q_id
stringlengths
5
6
title
stringlengths
3
301
selftext
stringlengths
0
39.2k
document
stringclasses
1 value
subreddit
stringclasses
3 values
url
stringlengths
4
132
answers
dict
title_urls
list
selftext_urls
list
answers_urls
list
5b7nr2
Can electricity wear down conducting media, like wires?
I know transistors can be worn down by flowing current, but can wires/cables too?
askscience
https://www.reddit.com/r/askscience/comments/5b7nr2/can_electricity_wear_down_conducting_media_like/
{ "a_id": [ "d9mky3k" ], "score": [ 24 ], "text": [ "Yes, it can!\n\nWe typically think of electronics failures as a mystery, just throw it away and replace it if it fails. But electronic failure mechanisms is a growing research field, and the physics behind many electronics failures is quite fas...
[]
[]
[ [] ]
a5xb1t
why are game updates so big when the code is probably just a few hundered mb?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/a5xb1t/eli5_why_are_game_updates_so_big_when_the_code_is/
{ "a_id": [ "ebpz1eo", "ebpz23s", "ebq47ae" ], "score": [ 8, 2, 2 ], "text": [ " > Why is Fallout 76's day one update 51GB?\n\nBecause Bethesda screwed up, same reason their beta had people clicking the play button in the launcher and the whole game deleted itself. Fallout 76 is a ...
[]
[]
[ [], [], [] ]
1lkmxp
Why do newer eggs sink and older eggs float? Is this phenomenon common in species other than chickens?
askscience
http://www.reddit.com/r/askscience/comments/1lkmxp/why_do_newer_eggs_sink_and_older_eggs_float_is/
{ "a_id": [ "cc0ccvp" ], "score": [ 2 ], "text": [ "Eggs have air sacs, and are porous. As time goes by, air from outside enters the air sac, making it float in water more readily. I imagine this is the same for all birds, but I'm not sure about reptiles." ] }
[]
[]
[ [] ]
159sbt
plank time and plank distance - how do they work?
A friend and I are having a debate about whether or not it is possible to travel a finite distance for an infinite amount of time. During the course of this discussion we realized it's important if time/space are infinitely divisible or not, which led us to wonder how anyone ever came up with the plank distance or plan...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/159sbt/eli5_plank_time_and_plank_distance_how_do_they/
{ "a_id": [ "c7kibq8", "c7kjmxn" ], "score": [ 4, 2 ], "text": [ "They're just combinations of various constants that happen to have dimensions of length and of time. They don't mean anything.", "May I direct you to the search function? These topics have been discussed several times:\n...
[]
[]
[ [], [ "http://www.reddit.com/r/explainlikeimfive/search?q=planck&restrict_sr=on&sort=relevance&t=all" ] ]
3x9vwx
why does space shuttles fly kind of "backwards" when they are starting?
Is this just that they can use the roation of the earth for their advantage and reach the first cosmic speed with lower energy output? Here is a video of what i mean (mobile version): _URL_0_ The relevant scene of the video starts at 2:20 Thank you.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3x9vwx/eli5_why_does_space_shuttles_fly_kind_of/
{ "a_id": [ "cy2s2yu" ], "score": [ 3 ], "text": [ "To get into orbit you need to go up, but also sideways. Turns out the most efficient way to get that done involves taking a very slanted trip up, not just burning straight up then burning directly sideways.\n\nYou also, with the STS, need to acco...
[]
[ "http://youtu.be/OnoNITE-CLc" ]
[ [] ]
3zf2ef
Does it matter from which plant pollen comes from when creating a seed?
Will pollen from a rose pollinate a lily just the same as any other plant?
askscience
https://www.reddit.com/r/askscience/comments/3zf2ef/does_it_matter_from_which_plant_pollen_comes_from/
{ "a_id": [ "cylm5fd", "cym6avm" ], "score": [ 10, 2 ], "text": [ "Pollen is what's called a 'gametophyte' and is one of the reproductive cells from a plant and as such holds 1/2 of the genetic material needed to form a viable seed. it forms on the stamen of the flower, the (usually) longe...
[]
[]
[ [], [] ]
m0y4k
Is there any way of discharging static electricity without getting 'zapped'?
askscience
http://www.reddit.com/r/askscience/comments/m0y4k/is_there_any_way_of_discharging_static/
{ "a_id": [ "c2x6akf", "c2x6rxc", "c2x6akf", "c2x6rxc" ], "score": [ 3, 4, 3, 4 ], "text": [ "Hold something conductive, such as a key, and discharge the spark through that.", "The \"zap\" you feel is often the static electricity arcing between your body and another sur...
[]
[]
[ [], [], [], [] ]
ly00i
Are there any scientific studies that support corporal punishment of children as helpful or conducive to their mental and emotional maturity?
askscience
http://www.reddit.com/r/askscience/comments/ly00i/are_there_any_scientific_studies_that_support/
{ "a_id": [ "c2wjowj", "c2wkesg", "c2wlwrg", "c2wm4vq", "c2wm6sl", "c2wm6xg", "c2wma26", "c2wmy09", "c2wntnp", "c2woij6", "c2wjowj", "c2wkesg", "c2wlwrg", "c2wm4vq", "c2wm6sl", "c2wm6xg", "c2wma26", "c2wmy09", "c2wntnp", "c2woij6" ], ...
[]
[]
[ [ "http://en.wikipedia.org/wiki/Parenting_styles" ], [], [], [], [], [ "http://www.reddit.com/r/askscience/comments/hssng/is_there_any_scientific_consensus_on_the/" ], [ "http://www.endcorporalpunishment.org/pages/pdfs/Gershoff-2002.pdf" ], [ "http://www.wiley.com/bw/journal.asp?...
g46dg
I have some questions about phosphorescence
I want to actually understand the physics behind phosphorescence (glow-in-the dark phenomena). Yes, I have read the Wikipedia page but I want more than a layman’s understanding and I don’t understand all the details on the page such as the concept of forbidden states. Specifically, I am interested in phosphorescence in...
askscience
http://www.reddit.com/r/askscience/comments/g46dg/i_have_some_questions_about_phosphorescence/
{ "a_id": [ "c1kt1t1", "c1kwrsl" ], "score": [ 2, 3 ], "text": [ "A textbook on physical chemistry is a good place, particularly the sections of molecular bonding. I might suggest Atkins. That will get you the most technical info on just what a forbidden state is, as well as clear definiti...
[]
[]
[ [], [ "http://minsocam.org/MSA/collectors_corner/arc/color.htm" ] ]
uagvb
difference between university system schools, state system schools and universities that only mention a city
I go to a university system school, and I have always been curious as to the differences between schools in those systems and schools in the "state system." I have always heard about the stigma of "state schools" and wonder what the BFD is? Ex: University of Colorado, Colorado State University, and University of Denve...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/uagvb/eli5_difference_between_university_system_schools/
{ "a_id": [ "c4tp0l6", "c4tp0l9", "c4tqgly" ], "score": [ 5, 2, 2 ], "text": [ "There are private and public schools. Public schools are (generally) known as \"state\" schools, because they are funded by the state and carry the name \"University of [State]\" or \"[State] Universit...
[]
[]
[ [], [], [] ]
b0u40v
why is paying a chartable organization money to pay staff/people to allow your child into a college a crime, but donating directly to that college to allow your child to attend not?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/b0u40v/eli5_why_is_paying_a_chartable_organization_money/
{ "a_id": [ "eih5zwm", "eih6k4c", "eih93sg" ], "score": [ 10, 2, 2 ], "text": [ "If you're talking about the recent scandal, they didn't donate to a charitable organization to get their children in. What happened in the current scandal is various bribes were paid to people at the c...
[]
[]
[ [], [], [] ]
hofib
Could dark matter consist of magnetic monopoles?
askscience
http://www.reddit.com/r/askscience/comments/hofib/could_dark_matter_consist_of_magnetic_monopoles/
{ "a_id": [ "c1x0sqe" ], "score": [ 19 ], "text": [ "No. Because then it would interact electromagnetically, which dark matter doesn't do." ] }
[]
[]
[ [] ]
4ujp0b
With antibiotic resistance becoming more and more widespread and some drugs maybe becoming obsolete, is it possible that after we've stopped using a drug for a while it becomes effective again?
askscience
https://www.reddit.com/r/askscience/comments/4ujp0b/with_antibiotic_resistance_becoming_more_and_more/
{ "a_id": [ "d5qzeuy", "d5rfozn" ], "score": [ 2, 4 ], "text": [ "Yeah, but this would take decades. The antibiotic resistance (ABR) genes are stored in plasmids of bacteria that linger in the cell. Unless the population has never encountered the drug in a very long time such that damage o...
[]
[]
[ [], [] ]
4bxk63
what's happening when you get the feeling like when you get to the bottom of an elevator?
Like your body sinks for a second. It seems like it happens randomly. Edit: Sorry for bad wording. I'm not talking about actually being on an elevator. It happens to me randomly sometimes. It lasts for a second and the best way I can describe it is the feeling of getting to the bottom of an elevator. I also thought ...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4bxk63/eli5_whats_happening_when_you_get_the_feeling/
{ "a_id": [ "d1d9v0y", "d1d9y2t" ], "score": [ 3, 3 ], "text": [ "No, it is not a special thing for you.\n\nPhysics says force equals mass times acceleration. When the elevator is getting to the bottom, it obviously slows down. Slowing down means acceleraring, and this means you feel a for...
[]
[]
[ [], [] ]
2kc365
how is putting an out facing open-palm in front of your face while giving a nod became "thank you/parden me"?
While driving, if you let someone pass through, they usually do the geusture I described in title, and it just feels like "thanks". Then the other driver usually just slightly palms without nodding for "no worries". But out facing open-palm usually mean "stop!". Is there some psychology behind this?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2kc365/eli5_how_is_putting_an_out_facing_openpalm_in/
{ "a_id": [ "clju5rj" ], "score": [ 3 ], "text": [ "It's a wave. It's short enough so that it's not too distracting, but still noticeable." ] }
[]
[]
[ [] ]
g1xxl9
during the time where the light bulb was invented, how did they have accessible electricity? did they have power plants like they do now? did they use some sort of battery?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/g1xxl9/eli5_during_the_time_where_the_light_bulb_was/
{ "a_id": [ "fni9r3q", "fniajjj" ], "score": [ 8, 2 ], "text": [ "The answer is, \"the same way they do now.\" That is, electricity was generated by a generator, which could be powered by a water turbine, a windmill, a gas engine, etc.\n\nThe generation of electricity came before the inven...
[]
[]
[ [], [] ]
5ean02
how do broken gifs work ... or don't work... ?
[Example (warning: creepy)](_URL_0_) [another example from my frontpage](_URL_1_) Theres also a subreddit about it /r/brokengifs
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5ean02/eli5_how_do_broken_gifs_work_or_dont_work/
{ "a_id": [ "daaxaz9", "daayw82" ], "score": [ 2, 5 ], "text": [ "do you have any example of what you mean?", "[There's a link in the sidebar](_URL_0_) of the subreddit you linked to.\n\nTL;DR videos are compressed by storing only the difference between subsequent frames, instead of st...
[]
[ "https://gfycat.com/BogusHonoredDogwoodtwigborer", "https://i.imgur.com/zcuAETF.gifv" ]
[ [], [ "https://www.reddit.com/r/brokengifs/comments/1l5fk8/brokengifs_request_mileys_vma_performance/cbwvcs5/" ] ]
5kouoc
why are people obsessed with collecting antique things?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5kouoc/eli5why_are_people_obsessed_with_collecting/
{ "a_id": [ "dbpinwc", "dbprw8c" ], "score": [ 3, 2 ], "text": [ "the quest for something authentic and unique in a world that has mastered mass manufacturing to the point that handmade has become a derogatory term.\n\nantiques have a providence that cannot be reproduced, even better if it...
[]
[]
[ [], [] ]
66mmas
why is enforcing illegal immigration in the usa so controversial?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/66mmas/eli5why_is_enforcing_illegal_immigration_in_the/
{ "a_id": [ "dgjobh5" ], "score": [ 3 ], "text": [ "why is enforcing pot laws so controversial? its enforcing the law.\n\nthe issue is that many dont like the law and how difficult it is to immigrate legally. \n\nThere is a practical economic arguement as well, immigrants are the only reason our...
[]
[]
[ [] ]
87zamd
why do symptoms of a cold sometimes go away overnight and sometimes take several days to fade away?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/87zamd/eli5_why_do_symptoms_of_a_cold_sometimes_go_away/
{ "a_id": [ "dwgprmz", "dwgpsn4", "dwgpz53", "dwgpzke", "dwgqgiy", "dwgqhzj", "dwgr3ds", "dwgsu1m", "dwgu6i2", "dwgvhwv", "dwgvodd", "dwgvqaw", "dwgvw40", "dwgx4xe", "dwgy865", "dwgy9d6", "dwgzija", "dwh6ul0", "dwhczc4", "dwhhx72", "d...
[]
[]
[ [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [] ]
am210f
AskScience AMA Series: We are vertebrate paleontologists who study crocodiles and their extinct relatives. We recently published a study looking at habitat shifts across the group, with some surprising results. Ask Us Anything!
Hello AskScience! We are paleontologists who study crocodylians and their extinct relatives. While people often talk about crocodylians as living fossils, their evolutionary history is quite complex. Their morphology has varied substantially over time, in ways you may not expect. We recently published a [paper lookin...
askscience
https://www.reddit.com/r/askscience/comments/am210f/askscience_ama_series_we_are_vertebrate/
{ "a_id": [ "efip9gf", "efiqxfr", "efirvf9", "efit18s", "efite0p", "efiuodr", "efiv6x1", "efiv9cs", "efivlwx", "efiwd9a", "efiwflo", "efiwm4e", "efiwnw6", "efiwrj8", "efix1gm", "efiy8i4", "efiyct5", "efiyl9x", "efiymh1", "efiyx7m", "e...
[]
[ "https://www.nature.com/articles/s41598-018-36795-1", "https://renaissance.stonybrookmedicine.edu/anatomy/people/faculty/wilberg", "https://clas.uiowa.edu/ees/people/christopher-brochu", "https://renaissance.stonybrookmedicine.edu/anatomy/people/facultypage/turner" ]
[ [], [], [ "https://www.cbsnews.com/news/alligators-frozen-north-carolina-swamp-with-noses-above-ice/" ], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [...
25c2nw
pharmacuticals are too expensive. why can't a motivated individual synthesize thier own?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/25c2nw/eli5_pharmacuticals_are_too_expensive_why_cant_a/
{ "a_id": [ "chfps08", "chfq1gb", "chfq68y" ], "score": [ 3, 2, 2 ], "text": [ "They could, but the problem is also that the components for making any drugs are hard to come by (evident when they need to either work with Smurfs or find more methylene).\n\nThrow in that making the m...
[]
[]
[ [], [], [ "https://www.ted.com/talks/lee_cronin_print_your_own_medicine" ] ]
2ntv99
does drinking chocolate milk give the same benefits as drinking regular milk?
I love chocolate milk, and was wondering if it's the same as regular milk. Like does it make your bones stronger and all that good stuff. Also, are there some downside to chocolate being part of the milk? (Excess chocolate consumption?) Bonus: what about milk with chocolate cereal turned into chocolate milk?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2ntv99/eli5_does_drinking_chocolate_milk_give_the_same/
{ "a_id": [ "cmgtqsj", "cmgtsgo", "cmgui1m" ], "score": [ 2, 2, 5 ], "text": [ "compare nutrition facts. I'm not relly sure what benefits you are referring to. I'm pretty sure \"making your bones stronger\" is a selling gimmick. A lot of adults eventually become lactose intolerant ...
[]
[]
[ [], [], [] ]
24snq3
what happens to a roach when you spray raid on it?
How does it kill it?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/24snq3/eli5_what_happens_to_a_roach_when_you_spray_raid/
{ "a_id": [ "chac37h", "chag2pw" ], "score": [ 8, 2 ], "text": [ "It's basically the equivalent of nerve gas on a human or other mammal. The reason it doesn't hurt us like that is because we are physiologically different enough that it doesn't react the same way (although note they can be ...
[]
[]
[ [], [] ]
44tsgl
airplanes flying against the earths rotation
Ok, so, if an airplane is flying the opposite direction of the earths rotation (flying east to west while the earth rotates west to east), would it arrive at the destination faster than if it was flying in the same direction the earths rotation? If not, what altitude would you have to be flying for the earths rotation ...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/44tsgl/eli5airplanes_flying_against_the_earths_rotation/
{ "a_id": [ "czstxxl", "czsu12w" ], "score": [ 2, 3 ], "text": [ "Well, the whole atmosphere rotates with the earth, so the bigger concern would be flying with/against the wind.", "No, the atmosphere is encompassed in the earth's rotation. \n\nSame as if you throw a ball straight up wh...
[]
[]
[ [], [] ]
1nm50t
if economics is a science, then how can there be such opposing theories within the field itself?
Economics is a science with formulas, data, laws, calculations, models, theories, etc. These ideas have been tested by various economists, and a lot of economists seem to be in agreement over the veracity of these economic laws and concepts. So why then are there so many different theories and ideas that often contradi...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1nm50t/eli5_if_economics_is_a_science_then_how_can_there/
{ "a_id": [ "ccjult3" ], "score": [ 5 ], "text": [ "Just because economics is a science doesn't mean there isn't more than one way to look at it. You find opposing theories in other sciences as well. Physics is also a science, yet nobody knows exactly why our universe works the way it does, and th...
[]
[]
[ [] ]
b1icsf
why do some young kids have potbellies and others have flat adult bellies?
Some kids that are say 4/5 years old (myself included) have/had protruding, beer belly, kid bellies. But I always remembered there would be other kids with flat non protruding bellies. I thought is was an organs too big for the torso kind of thing but does that mean kids with flat bellies have organs that are too small...
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/b1icsf/eli5_why_do_some_young_kids_have_potbellies_and/
{ "a_id": [ "eimbfm2", "eimvv6n", "ein6huk", "einr92u" ], "score": [ 8, 2, 9, 4 ], "text": [ "I was one of the flat tummied littles. I always chalked it up to my country upbringing full of activities that developed my abdominal muscles, therefore holding my innards in. I th...
[]
[]
[ [], [], [], [] ]
6na7nv
if telomeres prolong life, why can't we create more for our body, eventually achieving immortality?
[deleted]
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6na7nv/eli5_if_telomeres_prolong_life_why_cant_we_create/
{ "a_id": [ "dk7we5y", "dk7weyn", "dk7wft4" ], "score": [ 3, 2, 12 ], "text": [ "There's a massive catch with that plan: there's a telomere limit for a reason.\n\nBy setting the maximum number of divisions back to \"infinite,\" there's nothing to stop damaged or mutated cells from ...
[]
[]
[ [], [], [] ]
2wdvh8
why does honey, and some jams, tickle the back of my throat the more i eat it?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2wdvh8/eli5_why_does_honey_and_some_jams_tickle_the_back/
{ "a_id": [ "copxbh7" ], "score": [ 2 ], "text": [ "If it's a pineapple, [its enzymes are digesting your mouth](_URL_0_). If it's another fruit, I'd go with allergies." ] }
[]
[]
[ [ "http://blogs.unimelb.edu.au/sciencecommunication/2012/10/07/the-flesh-eating-pineapple/" ] ]
6erdw7
What exactly causes particles to produce a magnetic field?
I know what a magnetic field is, and how magnetic fields interact with each other, but I'm not sure on what actually causes them in the first place.
askscience
https://www.reddit.com/r/askscience/comments/6erdw7/what_exactly_causes_particles_to_produce_a/
{ "a_id": [ "dicuxwu" ], "score": [ 3 ], "text": [ "You naturally get magnetic fields in two ways:\n\n1. You have current, e.g moving charges.\n\n2. You have a fundamental magnetic dipole, e.g charged particles with spin (otherwise known as fundamental angular momentum).\n\nYou can make also make ...
[]
[]
[ [] ]
2spgpr
why don't they just land the spacex rocket into the water?
_URL_0_ So there's the landing from spaceX that exploded. I'm just wondering why they don't land it in the water, and have a net cast between two ships to hoist it up?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2spgpr/eli5why_dont_they_just_land_the_spacex_rocket/
{ "a_id": [ "cnrojs2", "cnrovjg", "cnrpwk2" ], "score": [ 3, 2, 3 ], "text": [ "First... \"having a net cast between two ships\" is extraordinarily dangerous. For various reasons having to do with fluid mechanics and naval engineering, ships traveling in very close proximity have a...
[]
[ "http://www.reddit.com/r/videos/comments/2sn6a6/footage_of_the_almost_successful_spacex_barge/" ]
[ [], [ "https://www.youtube.com/watch?v=Gbtulv0mnlU" ], [] ]
6ep77m
if an ambulance is already en route to an emergency, and an event such as a traffic accident happens in front of them, which emergency does the ambulance go to?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6ep77m/eli5_if_an_ambulance_is_already_en_route_to_an/
{ "a_id": [ "dibyra7" ], "score": [ 2 ], "text": [ "UK: Assuming the incident directly in front of them is significant, you stop and attend that. We call it a \"running call\", and in fact a registered paramedic is legally obliged to treat the patient in front of them. A new ambulance is despatche...
[]
[]
[ [] ]
jhsrh
rise of the planet of the apes through planet of the apes(2001) story line. including all of them?
Not sure if the story line makes perfect sense and I couldn't find an easy answer online. Go!
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/jhsrh/eli5_rise_of_the_planet_of_the_apes_through/
{ "a_id": [ "c2c8q0m", "c2c8q0m" ], "score": [ 3, 3 ], "text": [ "If you mean all of the movies, there are some conflicts - Conquest of the Planet of the Apes (the fourth movie) is also about how the apes finally took over the world, but it's a little more convoluted than the Rise of the P...
[]
[]
[ [], [] ]
15s94e
When I shake my water bottle, how significant is the temperature change since I'm adding kinetic energy?
I realize its not that significant because it obliviously doesn't change the temperature drastically but I've always wondered just how much temperature change occurs.
askscience
http://www.reddit.com/r/askscience/comments/15s94e/when_i_shake_my_water_bottle_how_significant_is/
{ "a_id": [ "c7pcr2e", "c7pisa7" ], "score": [ 2, 2 ], "text": [ "The friction of water when rubbing against other water particles or the plastic bottle is extremely low. The heat from friction would be almost none", "The specific heat of water is 4.186 joule/gram C. This means that it...
[]
[]
[ [], [] ]
v294y
Does a stereo or radio consume more power when at a higher volume?
askscience
http://www.reddit.com/r/askscience/comments/v294y/does_a_stereo_or_radio_consume_more_power_when_at/
{ "a_id": [ "c50nwwq" ], "score": [ 7 ], "text": [ "The answer is yes. If you want to output more power, you have to consume more power. \n\n(I am an electrical engineer.)" ] }
[]
[]
[ [] ]
3xfc0x
How effective was Nazi Germany at Counter Insurgency Operations during the Second World War?
-Were the Nazi's able to effectively quell Partisan Groups? -Did they rely on locals to do the Fighting? Or were special units put together? -Was it a "Hearts and Minds" campaign or one of complete "annihilation"? -Did they rely on massive sweeps or focus on infiltration?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/3xfc0x/how_effective_was_nazi_germany_at_counter/
{ "a_id": [ "cy4evdj" ], "score": [ 6 ], "text": [ "Well, the answer for that depends heavily on where and when but as a general reply, no, the Germans were not very good at counter-insurgency.\n\nWhere the Germans encountered the heaviest Partisan resistance, in the Soviet Union and Yugoslavia, t...
[]
[]
[ [] ]
6cqnsm
why does your car move sometimes after you put it into park?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6cqnsm/eli5_why_does_your_car_move_sometimes_after_you/
{ "a_id": [ "dhwtrqk" ], "score": [ 7 ], "text": [ "When you bring the car to a stop with the brakes you've stopped it at the wheels\n\nWhen you shift into park a lever puts a pin into the transmission to keep it from turning anymore, but this pin goes into a good sized slot with a bit of slop. W...
[]
[]
[ [] ]
1nmvbn
why are there no conservative hosts on npr?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1nmvbn/eli5_why_are_there_no_conservative_hosts_on_npr/
{ "a_id": [ "cck4f0i", "cck4gem", "cck4ib2", "cck5xho", "cck5zpi", "cck8v1o" ], "score": [ 35, 14, 3, 9, 28, 5 ], "text": [ "If you listen to NPR you find that politics is a very small portion of their programming.\n\nThey play news morning noon and night fo...
[]
[]
[ [], [], [], [], [], [] ]
2grqej
Were there every any large Welsh rebellions against the English?
I figured this would be an appropriate day to ask this. So the various rebellions of the Irish and Scots against the English are fairly well known, but there seem to be no such events regarding the Welsh, at least not that are widely known. I know the Welsh and English alignment goes back a lot further than that with...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/2grqej/were_there_every_any_large_welsh_rebellions/
{ "a_id": [ "cklx13n", "cklxhnz" ], "score": [ 2, 22 ], "text": [ "Owain Glyndwr led the last major Welsh uprising from 1400 to 1415. At the time there was definitely a current of Welsh nationalism, the previous king Richard II had supported and rewarded his Welsh followers in an attempt t...
[]
[]
[ [], [ "http://en.m.wikipedia.org/wiki/Owain_Glyndŵr", "http://www.reddit.com/r/AskHistorians/comments/2dev9t/marcher_lords_in_england/", "http://www.reddit.com/r/AskHistorians/comments/240phs/why_was_wales_so_rarely_united_under_a_single/" ] ]
68hspw
History as a subject can be perceived as a dead subject. What's the higgs boson of History, the coal face, the untapped seam. Where are Historians breaking new and exciting ground today?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/68hspw/history_as_a_subject_can_be_perceived_as_a_dead/
{ "a_id": [ "dgyt8q3" ], "score": [ 19 ], "text": [ "It seems rather strange to think of history as a dead subject, since there have been multiple revolutions in historical thinking since the 1950s. \n\nTo give the briefest overview of that, top down political history and diplomatic history was re...
[]
[]
[ [] ]
6v9jre
Is there conjecture on what the American continent would look like uninfluenced? Would it have seen industrialization anyhow?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/6v9jre/is_there_conjecture_on_what_the_american/
{ "a_id": [ "dlykm4h" ], "score": [ 2 ], "text": [ "Sorry, but your submission has been removed because we [don't allow hypothetical questions](_URL_1_). If possible, please feel free to rephrase the question so that it does not call for such speculation, and resubmit. Otherwise, this sort of thin...
[]
[]
[ [ "https://www.reddit.com/r/AskHistorians/comments/4mtauf/rules_roundtable_no_12_dont_play_the_whatif_game/", "http://www.reddit.com/r/AskHistorians/wiki/rules#wiki_is_this_the_right_place_for_your_question.3F" ] ]
blwd9j
specificity vs sensitivity in medical testing.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/blwd9j/eli5_specificity_vs_sensitivity_in_medical_testing/
{ "a_id": [ "emrxcou" ], "score": [ 2 ], "text": [ "Specificity is to identify that there is no disease when there is no disease, while sensitivity is to identify that there is a disease when there is a disease. When we talk about specificity and sensitivity, let's throw in Accuracy in the mix. A...
[]
[]
[ [] ]
6b4231
how are we able to determine things such as wind speeds and temperatures on planets outside of our solar system?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/6b4231/eli5_how_are_we_able_to_determine_things_such_as/
{ "a_id": [ "dhjmc6q", "dhk56o5" ], "score": [ 108, 6 ], "text": [ "It's actually not determinations, but rather predictions based on environment. \n\n\nEverything on a planetary scale is very hard to judge. Since the objects are so small and doesn't have the aspects of stars. For example,...
[]
[]
[ [], [] ]
g2wh39
what is allowing us to fit more information into smaller spaces as technology advances? how can a microchip achieve what a room full of computers couldn’t 30 years ago?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/g2wh39/eli5_what_is_allowing_us_to_fit_more_information/
{ "a_id": [ "fnnxraa", "fnq5w7l", "fnrjtsx" ], "score": [ 6, 2, 2 ], "text": [ "At the lowest level, a computers memory is made up of bits, which are little things that can represent either 1 or 0-on or off. The very simple answer is that we’ve been able to gradually find new ways ...
[]
[]
[ [], [], [] ]
4jxnck
why is music written as letters instead of numbers?
Just seems like it would be simpler and more geographically universal for other alphabets. Thanks!
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4jxnck/eli5_why_is_music_written_as_letters_instead_of/
{ "a_id": [ "d3af61f", "d3ak5j1" ], "score": [ 5, 2 ], "text": [ "So it doesn't confuse the number of beats with the note. As a 4 beat 2 sharp note would be confusing", "Have you ever seen guitar tabs? Many people who play the guitar learn to read tabulature, which uses numbers to ind...
[]
[]
[ [], [] ]
1qwop5
Monday Mysteries | The great accidents (and "accidents") of history -- important moments and events that came about by mistake, or which were purported to but with some sort of sinister possibility lurking behind.
**Previously:** - [New and controversial ideas in your field](_URL_21_) - [Meetings between historical figures](_URL_23_) - [Historical one-offs](_URL_5_) - [Historical historical misconceptions](_URL_14_) - [Secret societies and cults](_URL_4_) - [Astonishing individuals](_URL_26_) - [Suggestion thread](_URL_11_) - [...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/1qwop5/monday_mysteries_the_great_accidents_and/
{ "a_id": [ "cdhbns2", "cdhdsk0", "cdhhaw1", "cdhi44c", "cdhlpmw" ], "score": [ 34, 24, 26, 7, 13 ], "text": [ "I am relying on the \"moderation will be light\" bit here, as I am not a historian, but I find Amy Robsart's death to be an interesting topic. It falls so...
[]
[ "http://www.reddit.com/r/AskHistorians/comments/1gz7ac/monday_mysteries_your_family_mysteries/", "http://www.reddit.com/r/AskHistorians/comments/1g1we7/monday_mysteries_lost_lands_and_peoples/", "http://www.reddit.com/r/AskHistorians/comments/1cvbaz/monday_mysteries_missing_documents_and_texts/", "http://www....
[ [ "http://en.wikipedia.org/wiki/Edward_VI_of_England", "http://en.wikipedia.org/wiki/Elizabeth_I_of_England", "http://en.wikipedia.org/wiki/John_Dudley,_1st_Duke_of_Northumberland", "http://en.wikipedia.org/wiki/Mary_I_of_England", "http://en.wikipedia.org/wiki/Robert_Dudley,_1st_Earl_of_Leicest...
16qzeo
Sound question
Assuming the microphone that captures the sound of Big Ben is 1metre away from the bell, and that the sound is broadcast live without using satellite to a listener 2000km away, how far away would I have to stand before the radio listener hears the sound before I do?
askscience
http://www.reddit.com/r/askscience/comments/16qzeo/sound_question/
{ "a_id": [ "c7yj3ad", "c7yq6id" ], "score": [ 4, 2 ], "text": [ "Radio waves travel at the speed of light, so if we assume that signal transfer from the microphone to the radio receiver is instantaneous, and that travelling 2000km for light is (nearly) instantaneous, then as long as you s...
[]
[]
[ [], [] ]
8lfqco
what would happen to the world if all the water (read: salt, fresh, bottled, etc) on earth disappeared for one day and came back the next?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/8lfqco/eli5_what_would_happen_to_the_world_if_all_the/
{ "a_id": [ "dzf7td5", "dzf80e8" ], "score": [ 2, 4 ], "text": [ "Well, the first thing that happened, would be about 7 billion people freaking the fuck out that some supernatural event occurred beyond any reality humankind can conceive of in our 10,000 years of educated civilization about...
[]
[]
[ [], [] ]
2frrd5
why is it highly illegal to destroy currency but perfectly legal to hoard it?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2frrd5/eli5_why_is_it_highly_illegal_to_destroy_currency/
{ "a_id": [ "ckc4av1" ], "score": [ 6 ], "text": [ "It's not illegal to destroy money, it's illegal to destroy it for fraudulent purposes. Like, when pennies were still made of copper people would melt them down and sell them for scrap, or bleach $1 bills and reprint them as $20s." ] }
[]
[]
[ [] ]
86ch7f
how do laser guided missiles work?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/86ch7f/eli5_how_do_laser_guided_missiles_work/
{ "a_id": [ "dw3yf1t", "dw46ab6" ], "score": [ 6, 2 ], "text": [ "The laser illuminates the target with a frequency of light not typically abundant in ambient light. The missile has sensors to detect this frequency and thus can look for the bright spot, adjusting its fins to aim for it.", ...
[]
[]
[ [], [] ]
mepcw
How did an ancient quarry work?
Essentially I'm curious about how they would have separated whatever chunk of stone they are removing from the rest of the stone it was previously attached to. Did they just swing at big rocks with pickaxes until they broke away a roughly rectangular piece? It seems like with all of the nifty innovations ancient people...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/mepcw/how_did_an_ancient_quarry_work/
{ "a_id": [ "c30bs1h", "c30bs1h" ], "score": [ 18, 18 ], "text": [ "Very complex question, as it depends massively on the period you're interested in and what kind of stone. To summarise very briefly:\n\nDuring the prehistoric period and Bronze Age people used 'hammer stones' as hammers, b...
[]
[]
[ [ "http://www.ancient-wisdom.co.uk/egyptunfinishedobelisk.htm" ], [ "http://www.ancient-wisdom.co.uk/egyptunfinishedobelisk.htm" ] ]
988vls
how can some airlines be consistently late or delayed? what contributes to these delays? i've noticed especially towards end of day flights, they're always running late on spirit or sun country.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/988vls/eli5_how_can_some_airlines_be_consistently_late/
{ "a_id": [ "e4e7itq" ], "score": [ 2 ], "text": [ "Workers and equipment cost money to operate. \n\nFor example United might have 10 sets of baggage handling crews and tractors plus carts to load and unload baggage off a plane. So at any given time 10 planes are being loaded or unloaded. Plus cre...
[]
[]
[ [] ]
7obw1g
How do scientists teach Gorillas sign language, and how complex is their speech?
askscience
https://www.reddit.com/r/askscience/comments/7obw1g/how_do_scientists_teach_gorillas_sign_language/
{ "a_id": [ "ds9fouk", "ds9h7ng" ], "score": [ 6, 6 ], "text": [ "Koko it is said, has the IQ of a five year old human. \nThey teach them just like you teach a human baby, by pairing signs with the most important things that a gorilla wants or needs first, like food and water, etc. \n\nIIR...
[]
[]
[ [], [ "https://en.m.wikipedia.org/wiki/Facilitated_communication", "http://flum.blogspot.com/1998/08/transcript-of-live-chat-session-with.html?m=1" ] ]
3rs3re
if smoking/nicotine directly increases your blood pressure, why is it such a relief to have a cigarette when you're stressed out or tense?
Can't quite figure this out
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/3rs3re/eli5_if_smokingnicotine_directly_increases_your/
{ "a_id": [ "cwqt7co", "cwqtgru" ], "score": [ 5, 3 ], "text": [ "Because nicotine directly effects the pleasure center in your brain, making you feel better despite the negative things it might do to your blood pressure. Your brain is chemically induced to think \"ahh, things are good\"....
[]
[]
[ [], [] ]
31knfw
what involvement/role did south africa have in the cold war?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/31knfw/eli5what_involvementrole_did_south_africa_have_in/
{ "a_id": [ "cq2i93q" ], "score": [ 3 ], "text": [ "[The Border War](_URL_3_), mainly.\n\nAngola had a communist government at the time, and a communist (at the time) rebel group called SWAPO [was trying to take Namibia (South-West Africa)](_URL_0_). The ANC was also seen as communist terrorists b...
[]
[]
[ [ "https://en.wikipedia.org/wiki/Namibian_War_of_Independence", "https://en.wikipedia.org/wiki/Cuban_intervention_in_Angola", "https://en.wikipedia.org/wiki/South_African_Commando_System", "https://en.wikipedia.org/wiki/South_African_Border_War" ] ]
1u9j3b
If D-Wave is really confirmed to be a quantum computer, does it mean that it can crack any code that would otherwise take billions of years to be decoded ?
Modern (classical) cryptography is based on the multiplication of large prime numbers to get a big number. To be able to decode the secret message, one must be able to factorize this big number into the two prime numbers. With classical computers, this would take a time larger than the age of the universe. However, I...
askscience
http://www.reddit.com/r/askscience/comments/1u9j3b/if_dwave_is_really_confirmed_to_be_a_quantum/
{ "a_id": [ "ceg3upr" ], "score": [ 3 ], "text": [ "No, D-Wave is not a general quantum computer, it can performs a process which is known as discrete optimization. Algorithms which can solve certain barriers in cryptography, i.e. prime factorization exist, but require a more general quantum comp...
[]
[]
[ [] ]
28s3vr
- what made the first atom?
So I am having this conversation with one of my religious friend and this came up, he thinks there is a god because he thinks "someone" made the first atom... Is there logic behind this? Or is it a mystery?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/28s3vr/eli5_what_made_the_first_atom/
{ "a_id": [ "cidwor6", "cidwrbu", "cidwyk8", "cidx337", "ciefjc8" ], "score": [ 4, 2, 9, 15, 2 ], "text": [ "No matter who you ask or how they word it, the most accurate answer to this question is 'they don't know' ", "A few electrons, protons, and neutrons got ...
[]
[]
[ [], [], [], [ "http://en.wikipedia.org/wiki/Big_Bang_nucleosynthesis" ], [] ]
vt5it
Is there dwarfism in animals other than humans?
The [wiki on dwarfism](_URL_0_) gave me no answer. I saw an adult dog the other day that was kinda small, and I thought "Maybe it's a midget dog". But then I thought, "I've never seen an animal that's a midget/dwarf". Do they exist? If not, why not?
askscience
http://www.reddit.com/r/askscience/comments/vt5it/is_there_dwarfism_in_animals_other_than_humans/
{ "a_id": [ "c57ffm2", "c57fh2f", "c57g2on" ], "score": [ 2, 3, 2 ], "text": [ "There are cases of [horses with dwarfism](_URL_0_).", "Yes _URL_0_ \n\nWhole sub-species in isolated areas can exhibit dwarfism or gigantism. \n\nAnd many domestic species have dwarf breeds. The mut...
[]
[ "http://en.wikipedia.org/wiki/Dwarfism" ]
[ [ "http://en.wikipedia.org/wiki/Miniature_horse#Dwarfism" ], [ "http://en.wikipedia.org/wiki/Insular_dwarfism" ], [] ]
3k1gy1
What is an extremely aerodynamic shape?
I want to build a pinewood derby car for a physics class activity.
askscience
https://www.reddit.com/r/askscience/comments/3k1gy1/what_is_an_extremely_aerodynamic_shape/
{ "a_id": [ "cuu15v6", "cuu1vvt" ], "score": [ 5, 11 ], "text": [ "The best shape for supersonic flow is a [Sears-Haack body](_URL_1_). For subsonic flow, your best bet is to make your shape as [thin and pointed as possible.](_URL_2_) \n\nThere are two types of drag you will be fighting ...
[]
[]
[ [ "https://en.wikipedia.org/wiki/Parasitic_drag", "https://en.wikipedia.org/wiki/Sears%E2%80%93Haack_body", "http://exploration.grc.nasa.gov/education/rocket/shaped.html", "https://en.wikipedia.org/wiki/Nose_cone_design#/media/File:Nose_cone_drag_comparison.png", "https://en.wikipedia.org/wiki/N...
2nf4kl
what do muslim do for ramadan in places where the sun doesn't set for months on end ?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2nf4kl/eli5_what_do_muslim_do_for_ramadan_in_places/
{ "a_id": [ "cmd1ty7" ], "score": [ 5 ], "text": [ "I've asked my Moslem friends the same question. Best answer I got was they go by the sunrise and sunset time in Mecca. What did they do before the ability to google? That's the better question" ] }
[]
[]
[ [] ]
x67g9
Questions Regarding Wilhelm II, German Emperor.
The wiki article on Wilhelm II seems very contradictory to me so I was hoping to get some addition information on him. How much did his personal feelings affect his reign? The wiki on him seemed to really stress this point but doesn't everyones personalities affect their reign? Was he different than other rulers at t...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/x67g9/questions_regarding_wilhelm_ii_german_emperor/
{ "a_id": [ "c5jrc82", "c5jxolq" ], "score": [ 3, 2 ], "text": [ "These questions are not in my era of primary focus, and I'm very opinionated in my view of the Kaiser/German Empire, so I'll let others answer these. Following are a few books I can suggest:\n\n*George, Nicholas and Wilhelm...
[]
[]
[ [], [] ]
4elpa3
how does the water we drink become sweat even though we 'expel' the liquid through our pee?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4elpa3/eli5_how_does_the_water_we_drink_become_sweat/
{ "a_id": [ "d215bel" ], "score": [ 3 ], "text": [ "Your body is mostly water. Not all fluids go straight to your kidneys and gets urinated out. The water passes through your vessels along the way where it flows into your muscles and skin. " ] }
[]
[]
[ [] ]
3xsivw
Could multiple Earth-like planets form in the same band of a habitable zone?
Could Mars have turned out nearly exactly like Earth? Basically what would answer my root question is "How many Earth like planets could be crammed into a single habitable zone?"
askscience
https://www.reddit.com/r/askscience/comments/3xsivw/could_multiple_earthlike_planets_form_in_the_same/
{ "a_id": [ "cy7jqsv", "cy7vddz", "cy82jmh" ], "score": [ 55, 5, 2 ], "text": [ "I believe Venus and Mars are both technically inside of the sun's habitable zone, but Venus has a runaway greenhouse effect and Mars' core is dead and unable to generate a magnetic field meaning it is ...
[]
[]
[ [], [], [] ]
32bxgn
does abstaining from masturbation actually increase a person's energy?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/32bxgn/eli5does_abstaining_from_masturbation_actually/
{ "a_id": [ "cq9t02m", "cq9t9i3" ], "score": [ 24, 2 ], "text": [ "No, though it may cause a slight change in personality.\n\nPhysically your body will take care of everything else. \n\nFor men, they may experience nightfall or nocturnal emissions. Semen die off while in the testicles and ...
[]
[]
[ [], [] ]
7wcxrk
Why did the Old Norse language break up into the Danish, Swedish, Norwegian and Icelandic languages?
First of all, the Scandinavians were pretty good at sailing the northern seas and had good trade connections within the region. The regions that share a language and are not isolated from each other usually don't diverge into different languages. Second, when the split started occuring, the regions were held together ...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/7wcxrk/why_did_the_old_norse_language_break_up_into_the/
{ "a_id": [ "du0dfnh" ], "score": [ 3 ], "text": [ "Old Norse had already diverged into West and East Norse branches by the 10th century, and by the start of the Kalmar Union those had diverged further into Old Icelandic, Old Norwegian, Old Danish and Old Swedish. But the languages are not homogen...
[]
[]
[ [ "https://www.saob.se/artikel/?seek=BAGARE" ] ]
i81zk
If travelling in a train close to the speed of light, would you adjust to the speed or would you not be able to move?
I'm having a debate with some friends, they say that eventually you would adjust and basically be able to move freely, as if you were in a normal train that's moving at normal speed. My hunch is that you would have too much inertia at that speed and would not even be able to move (if somehow you survive arriving at tha...
askscience
http://www.reddit.com/r/askscience/comments/i81zk/if_travelling_in_a_train_close_to_the_speed_of/
{ "a_id": [ "c21mohg", "c21mop5", "c21mowd", "c21n0qq", "c21nna7", "c21v88t" ], "score": [ 10, 28, 6, 4, 5, 2 ], "text": [ "If you're moving at a constant speed, there would be no forces related to the moving that would hinder your movement. \n\nThe interest...
[]
[]
[ [], [], [], [], [], [] ]
3fplwx
How aware would the average Soviet Citizen have been of the outside world in 1945 - 1953?
Were the citizens of the USSR aware of what was going on elsewhere in the world at that time?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/3fplwx/how_aware_would_the_average_soviet_citizen_have/
{ "a_id": [ "ctqtapf" ], "score": [ 3 ], "text": [ "Major world events would be given an official spin but completely obscuring them wasn't seen as realistic and wasn't attempted. More obscure facts might be simply ignored, however. According to Wikipedia, [radio jamming commenced in 1948](_URL_0_...
[]
[]
[ [ "https://en.wikipedia.org/wiki/Radio_in_the_Soviet_Union#Radio_jamming" ] ]
3fd707
outdoor temperature changes in shade
Riding my Road Glide today I noticed again that the temperature drops about 15-20 degrees at certain portions of the road that are shady. With air circulation, how can this be? There are many areas around here that I can predict are going to be cool when I drive through them.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/3fd707/eli5_outdoor_temperature_changes_in_shade/
{ "a_id": [ "ctnjti3" ], "score": [ 3 ], "text": [ "Because direct sunlight heats things up, it heats the ground the trees and you. Each of thes things radiates heat back inti the air around it. In the shade it is not heating the ground, and that heat is not be radiated back up at you. The cooler ...
[]
[]
[ [] ]
1qxqqz
process of making an app
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1qxqqz/eli5_process_of_making_an_app/
{ "a_id": [ "cdhkykf", "cdhmyxi", "cdhpc2n", "cdhpym6" ], "score": [ 3, 2, 3, 2 ], "text": [ "1. Decide what you want to make.\n\n2. Create the backend. Example: the wire frame of a building. \n\n3. You create the frontend, which is what we see and interact with.\n\n4. Put ...
[]
[]
[ [], [], [ "www.GetCurrentConversionRate.com/?from=USD&to=EUR" ], [] ]
1isiji
sha256 hashing.
Hello ELI5, I'm trying to wrap my head around the following math & pseudocode: _URL_0_ Can someone take "Hello World" and turn it into a SHA256 hash step by step as shown in the above wiki please?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1isiji/eli5_sha256_hashing/
{ "a_id": [ "cb7rh9c", "cb7s7ga", "cb7t8du" ], "score": [ 4, 3, 4 ], "text": [ "It's not SHA2 and still above ELI5 level, but here's a [step by step breakdown of MD5 encoding \"Hello World\"](_URL_1_).\n\nIf you'd like to learn the basics about how hashing works then reading up on ...
[]
[ "https://en.wikipedia.org/wiki/SHA-2#Pseudocode" ]
[ [ "http://en.wikipedia.org/wiki/Cyclic_redundancy_check", "http://www.scribd.com/doc/35954574/MD5-With-Example" ], [ "http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA256.pdf" ], [ "http://www.reddit.com/r/explainlikeimfive/comments/1isiji/eli5_sha256_hashing/cb7rdxn", "http:...
5src7t
when people that got caught in the travel ban got sent back to their country of origin, who paid for the flight?
What happens if they didn't have any money? The airline isn't going to give them a seat for free. Also, I imagine that most of the flights were already fully booked. I can't imagine the airline would bump travelers just to accommodate the government.
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5src7t/eli5when_people_that_got_caught_in_the_travel_ban/
{ "a_id": [ "ddha09v" ], "score": [ 9 ], "text": [ "Standard Disclaimer: The answer will be as politically neutral as possible.\n\nThe short answer is, it's a mess. If you've ever travelled internationally, you've noticed that the airline--but not necessarily the government of the nation that you...
[]
[]
[ [ "http://fortune.com/2017/01/28/westjet-muslim-travel-ban/", "https://en.wikipedia.org/wiki/The_Terminal", "http://travel.stackexchange.com/questions/35998/what-happens-when-you-book-a-flight-to-a-country-you-dont-have-a-visa-for" ] ]
25efe7
Questions about the names of British monarchs
How would historic monarchs have pronounced their own names? Many of the names of the kings of England were Norman French in origin. Take *Henry*. I assume this would originally have been pronounced like the French, with a dropping of the initial H. But by the time of Henry VIII, Early Mordern English would have start...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/25efe7/questions_about_the_names_of_british_monarchs/
{ "a_id": [ "chgr84z", "chgs7jy" ], "score": [ 4, 2 ], "text": [ "I can't answer to all of them but George was a name that existed in the English Royal Family long before the the Georgian Kings with the brother of Edward IV and Richard III being George, Duke of Clarence", "As this has ...
[]
[]
[ [], [] ]
283nuz
How did the generals of the Spanish Civil War rate as military leaders?
I've got a healthy amateur interest in the Spanish Civil War (I've read Hemingway & Orwell on the conflict and Beevor's history). I feel like I hear a lot about the Spanish generals as political actors, but I can't recall much discussion on their abilities as commanders- were any of them particularly talented as mili...
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/283nuz/how_did_the_generals_of_the_spanish_civil_war/
{ "a_id": [ "ci768sg" ], "score": [ 4 ], "text": [ "Spain at the outbreak of the civil war did have a rather limited pool of experienced commanders, partly due to the neutrality through the first world war, and also partly because of Spain's quite aristocratic military class. Despite this, a few c...
[]
[]
[ [] ]
90qs09
Would a gay slave-owner in the antebellum southern US who sexually exploited his male slaves be regarded as more scandalous than a straight slave-owner who did it to female slaves, or was there an implicit "it's not the Sin of Sodom if it's just your chattels" type rule?
I've come across some claims that there was a kind of ritualized public rape of male slaves used as punishment, referred to as "breaking the buck," but I don't know whether the sources I've come across are reliable. Would a slave owner in the antebellum southern US who preferred men be regarded as particularly scandal...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/90qs09/would_a_gay_slaveowner_in_the_antebellum_southern/
{ "a_id": [ "e2sshze" ], "score": [ 33 ], "text": [ "While it doesn't directly address your question, [/u/sowser's answer](_URL_0_) is a particularly in-depth look at whether buck breaking existed (no) and why same-gender sexual exploitation of slaves is is probably not captured that well in the h...
[]
[]
[ [ "https://www.reddit.com/r/AskHistorians/comments/4vicrb/buck_breaking_of_slaves/" ] ]
2147bu
if the us dollar is most used currency in international transactions and the worlds most dominant currency reserve, why are other currencies such as the euro and the pound, worth more in the exchange rate?
Shouldn't the US dollar be the most valuable currency? Why is 1 dollar 0.73 Euros, or 0.61 Pounds?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2147bu/eli5_if_the_us_dollar_is_most_used_currency_in/
{ "a_id": [ "cg9fzce", "cg9g6fh", "cg9g81g", "cg9gev9" ], "score": [ 3, 3, 2, 7 ], "text": [ "probably because there are more us dollars?..", "So people mean the USD to be \"most valued\" in the sense that people around the world trust the US to not fall into anarchy an...
[]
[]
[ [], [], [], [] ]
1nhi9b
why do dogs bury stuff?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1nhi9b/eli5_why_do_dogs_bury_stuff/
{ "a_id": [ "ccinuin" ], "score": [ 3 ], "text": [ "So they can find it later. " ] }
[]
[]
[ [] ]
82ecn0
How did civil war soldiers cross the country?
When soldiers from the west coast ended up in the east, does that mean they mostly marched across the entire country? How likely was a soldier to have used a horse at some point on the journey?
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/82ecn0/how_did_civil_war_soldiers_cross_the_country/
{ "a_id": [ "dv9rtg5" ], "score": [ 6 ], "text": [ "As far as I can tell, very, very few regiments (if any) raised on the west coast proper ever went east of New Mexico territory. California raised ten regiments and two battalions, and all either served in the Department of the Pacific on garrison...
[]
[]
[ [] ]
2cp3x4
why is ireland not in nato?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2cp3x4/eli5_why_is_ireland_not_in_nato/
{ "a_id": [ "cjhltxr", "cjhlu05" ], "score": [ 2, 2 ], "text": [ "Ireland initially refused to join NATO because Northern Ireland was still being held by the United Kingdom. They also tend towards a policy of neutrality, and did not align with either NATO or the Warsaw Pact. However, more ...
[]
[]
[ [], [] ]
68j2ae
is love a chemical reaction in the human brain?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/68j2ae/eli5_is_love_a_chemical_reaction_in_the_human/
{ "a_id": [ "dgyuih2", "dgyyfzp" ], "score": [ 22, 7 ], "text": [ "Everything you feel is chemical reactions in the brain and across the nervous system. From terror to love. ", "Yes, we are chemical reactions, birth to death, everything we do. But don't take that the wrong way. It's su...
[]
[]
[ [], [] ]
1y25zb
why are some people "ticklish" and others not?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/1y25zb/eli5_why_are_some_people_ticklish_and_others_not/
{ "a_id": [ "cfgqvpk", "cfgqwni", "cfgse7u", "cfgt1pg", "cfgt3lo", "cfgt4nj", "cfgt97x", "cfgt9hp", "cfgtprk", "cfgtwpu", "cfgu8td", "cfgub7u", "cfguob5", "cfguuc6", "cfguy52", "cfguzcg", "cfgw86f", "cfgwbbv", "cfgzcbm", "cfh0s55", "c...
[]
[]
[ [ "http://www.dailymail.co.uk/news/article-2331500/Researchers-discover-laugh-tickled--answer-funny.html", "http://www.nytimes.com/1997/06/03/science/anatomy-of-a-tickle-is-serious-business-at-the-research-lab.html" ], [], [], [ "http://en.wikipedia.org/wiki/Tickling" ], [], [], [], [ ...
5lubmc
Did all soldiers carry morphine in WWII? If so, was there a problem with soldiers using it to get high or for minor injuries?
I just rewatched band of brothers, and in the episode on the battle of the bulge the medic is asking everyone if they have any morphine left. So just curious about it.
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/5lubmc/did_all_soldiers_carry_morphine_in_wwii_if_so_was/
{ "a_id": [ "dbz7yq4" ], "score": [ 13 ], "text": [ "In the case of parachute wearers, yes, but in the case of regular infantry, no. The Army Air Forces issued the [parachute first aid packet](_URL_3_) (item no. 9778500) to all men issued with a parachute. When the United States activated its firs...
[]
[]
[ [ "http://imgur.com/a/oWP3p", "http://imgur.com/a/k6CSR", "http://militaryresearch.org/7-11%20Med%20Det%2026Feb44.pdf", "http://imgur.com/a/MoMdZ", "http://imgur.com/a/z5yDX", "https://www.med-dept.com/medical-kits-contents/medical-kits-contents-kits-of-medical-personnel/", "http://imgur...
14ucei
The moon's colour is said to be an uneven composition of a redish/dark blueish grey and slightly yellow tinge. However, in the Apollo images we see it is a bright grey/white. Why ? and Why does its true colour show up on the reflection of the astronauts helmet ?
_URL_0_ I understand that the type of shielding used on the helmet produces the colour shift, but that is still closer to the true colour of the moon, compared to what is shown in rest of the photo.
askscience
http://www.reddit.com/r/askscience/comments/14ucei/the_moons_colour_is_said_to_be_an_uneven/
{ "a_id": [ "c7gjx2y", "c7gjy1u", "c7gqbir" ], "score": [ 23, 8, 2 ], "text": [ "The true color of the Moon is merely mostly white/grey. You can see this easily just by looking at the Moon from Earth. It does have some slight coloration (typically a sort of ruddy dark orange-ish co...
[]
[ "http://history.nasa.gov/alsj/a17/AS17-134-20387HR.jpg" ]
[ [], [], [] ]
3gyp84
Why does the debris from comets stay in the same place each year, causing consistent meteor showers?
When a comet leaves behind a bunch of dust/ice/rocks as it passes through the inner solar system, it seems like those objects should be moving with respect to the sun--either orbiting or falling in. Yet, meteor showers happen on the same nights each year, which implies that those debris fields stay stationary with res...
askscience
http://www.reddit.com/r/askscience/comments/3gyp84/why_does_the_debris_from_comets_stay_in_the_same/
{ "a_id": [ "cu2o30g", "cu2oksw" ], "score": [ 14, 4 ], "text": [ " > Or does it orbit the sun in exactly the same orbital path as the comet itself?\n\nThat is exactly correct. Without any significant work done on the dust particles, they have no choice but to occupy the same orbit as the...
[]
[]
[ [], [ "http://www.scientificamerican.com/article/what-causes-a-meteor-show/" ] ]
c47nyp
I'm struggling keeping track of events and people in an extended time period, are there any methods or software you use to timeline while doing research?
I'm a visual learner, unfortunately, and I'm trying to do a bit of research of a long era and keep track of major and minor events that had a direct or indirect impact, as well as major players. I'm struggling to keep track of it due to aforementioned visual learning. Does anyone have any methods or tools they use whil...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/c47nyp/im_struggling_keeping_track_of_events_and_people/
{ "a_id": [ "ervb99z", "evm7ku0" ], "score": [ 6, 2 ], "text": [ "People have their own ways of organizing information-- what works for me won't necessarily work for you, but anyway:\n\nTechnique #1: Write practice answers with footnotes. The mere act of typing something up with sources te...
[]
[]
[ [], [] ]
5kjz3p
how do well known animals go extinct?
I just saw the post about cheetahs heading toward extinction. It seems like they are so well known, respected, cared for and protected. How is this possible?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/5kjz3p/eli5_how_do_well_known_animals_go_extinct/
{ "a_id": [ "dbofs5i" ], "score": [ 4 ], "text": [ "Because sometimes that protection is too little, too late. Relatively speaking we have only been concerned about the conservation of animals for a few decades but have been hunting and exploiting animals for millennia.\n\nFor whatever reason, Che...
[]
[]
[ [] ]
zc3ov
Do CPUs make noise?
I've always wondered what's the noise (something like crunching nuts) that PCs make during heavy load. That's particularly evident during Windows boot, but totally absent in OS X. I'm pretty sure that's not HD vibrations because I heard this sound coming from SSD PCs.
askscience
http://www.reddit.com/r/askscience/comments/zc3ov/do_cpus_make_noise/
{ "a_id": [ "c63a8ur", "c63aizf", "c63c9i4", "c63e882" ], "score": [ 4, 2, 7, 3 ], "text": [ "Nothing that you can hear from the actually CPU chip.\n\nThere are fans on the CPU and case fans that can be noisy, especially if the bearings are bad. Some power supplies can mak...
[]
[]
[ [], [], [], [] ]
dvcbnt
Any historians here know their Soviet Era uniforms?
Not sure if this is the right place to be asking this question, and if it’s not allowed then the mods should notify me to remove it, but anyway here it goes. I collect military uniforms and gear, and one of my sets I’ve found confuses me to say the least, i can not find any sources as to what type this is, Its a sovie...
AskHistorians
https://www.reddit.com/r/AskHistorians/comments/dvcbnt/any_historians_here_know_their_soviet_era_uniforms/
{ "a_id": [ "f7bu7ua" ], "score": [ 2 ], "text": [ "Would you be able to post a photo?" ] }
[]
[]
[ [] ]
4me7li
Why does ice melt so quickly on ceramics?
Science teacher here - I conducted an experiment with my students to see how different surfaces affect the rate at which ice melts. (see video here: _URL_0_) Every time the ice on the ceramic has melted the fastest. I've been trying to work out why this is. I found this old question which I think explains why ceram...
askscience
https://www.reddit.com/r/askscience/comments/4me7li/why_does_ice_melt_so_quickly_on_ceramics/
{ "a_id": [ "d3uzgrf", "d3v4tya" ], "score": [ 6, 2 ], "text": [ " > Every time the ice on the ceramic has melted the fastest. I've been trying to work out why this is.\n\nI'm a little confused, because the video you linked to shows the ice melting fastest on the ceramic in the first trial...
[]
[ "https://www.youtube.com/watch?v=-92_EUklcMU", "https://www.reddit.com/r/askscience/comments/1b0bqt/why_are_ceramic_materials_such_good_thermal/" ]
[ [], [] ]
yynyn
Who is more closely related genetically, a mother and her sister, or a mother and her son?
My mom and I were trying to figure out if I or her sister (not a twin) had more in common genetically.. I'm not a biology kind of guy so I don't really know. Sorry if this is a simple question!
askscience
http://www.reddit.com/r/askscience/comments/yynyn/who_is_more_closely_related_genetically_a_mother/
{ "a_id": [ "c5zyicc" ], "score": [ 7 ], "text": [ "If we look at autosomal DNA only, a mother and her son shares 50% of their DNA. This figure doesn't change - 22 chromosomes must come from the mother.\n\nA mother and her sister will, _on average_, also share 50% of their autosomal DNA, but it c...
[]
[]
[ [] ]
3bhacj
Whenever you multiply 9 by any number, except zero, the sum of those numbers will also equal 9. Can you explain the relationship?
9 x 3 = 27, 2+7=9 9 x 5736=51624, 5+1+6+2+4=18, 1+8=9 It goes on like this with any number (except 0) **EDIT:** Thank you for the responses!! I've always wondered this but never been able to figure out where to start. You are all awesome!
askscience
http://www.reddit.com/r/askscience/comments/3bhacj/whenever_you_multiply_9_by_any_number_except_zero/
{ "a_id": [ "csm9ihx", "csmczmb", "csmipul" ], "score": [ 25, 2, 4 ], "text": [ "What you're really seeing is that for any number of the form 9k, where k is an integer, i.e. any number divisible by 9, the sum of the digits of that number is also divisible by 9. This can be best und...
[]
[]
[ [], [], [] ]
acqs4v
How can NSAIDs increase the risk of heart attack, yet aspirin therapy reduces it?
askscience
https://www.reddit.com/r/askscience/comments/acqs4v/how_can_nsaids_increase_the_risk_of_heart_attack/
{ "a_id": [ "eda8q1g", "edakd8q" ], "score": [ 3, 5 ], "text": [ "Disclaimer: I don't think anyone has a definitive answer yet. I think it's just observational studies that point out Aspirin does not seem to carry increased risk of heart attacks, myocardial infarctions.\n\nAspirin, or acet...
[]
[]
[ [], [] ]
101po5
how do websites like _url_0_ "sell" web domains?
Do they actually own them, or are they more like middlemen?
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/101po5/eli5_how_do_websites_like_godaddycom_sell_web/
{ "a_id": [ "c69mwoi" ], "score": [ 3 ], "text": [ "I asked my friend this and he said, \"a domain seller pre makes a shit ton of websites, so if some one wanted to make one with the same name would see a site that says \"domain for sale at _URL_0_\" and then would have to buy the name from them. ...
[ "godaddy.com" ]
[]
[ [ "xxxxx.com" ] ]
e6rx5v
the wigner effect
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/e6rx5v/eli5_the_wigner_effect/
{ "a_id": [ "f9su60j" ], "score": [ 2 ], "text": [ "The Wigner effect is seen in materials that are exposed to sources of high energy neutrons. Usually in reactors. The neutrons are of course smaller than individual atoms, but in a typical reactor there are literally billions of them shooting out ...
[]
[]
[ [] ]
2y0k3e
why can insurance companies blatantly rip off their customers by not paying out for what they're covered for?
I'm not the most educated in this field but I've heard countless tales of people being left stranded and without money after their insurer refused to compensate them for damages, why can they do this? Why hasn't a law been set up to counteract this? EDIT: Ok, I understand I was wrong about them ripping you off, I just...
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/2y0k3e/eli5_why_can_insurance_companies_blatantly_rip/
{ "a_id": [ "cp53gdu", "cp54fin", "cp55vr6", "cp56a0z", "cp5ayg7", "cp5iie4", "cpcx0ji" ], "score": [ 58, 15, 3, 8, 2, 2, 2 ], "text": [ "I work in the insurance claims industry (homeowners insurance), your premise is incorrect but I understand why p...
[]
[]
[ [], [], [], [], [], [], [] ]
5icgz4
What IS a wavefunction?
Engineering undergrad here who just finished his first course in introductory quantum mechanics. In my class, particles such as electrons were described as "being" probability amplitudes as described by the wavefunction. I'm aware that the particle isn't strictly a "particle" in the sense of a really tiny marble, but ...
askscience
https://www.reddit.com/r/askscience/comments/5icgz4/what_is_a_wavefunction/
{ "a_id": [ "db75t6l", "db77g8k", "db7emyl", "db7o486", "db8fcpy" ], "score": [ 53, 2, 2, 5, 3 ], "text": [ "The particle is its wave function. It's not secretly hiding, waiting for us to measure so it can tell us where it is, it is everywhere simultaneously. \n\nDo...
[]
[]
[ [ "https://en.wikipedia.org/wiki/Quantum_decoherence", "https://en.wikipedia.org/wiki/Measurement_problem" ], [], [], [], [ "http://hsm.stackexchange.com/questions/3631/when-was-the-measurement-problem-solved/3655#3655" ] ]
33z3e3
Did 'cavemen' ever get fat? If not, then what point in history did obesity or being overweight come into being?
AskHistorians
http://www.reddit.com/r/AskHistorians/comments/33z3e3/did_cavemen_ever_get_fat_if_not_then_what_point/
{ "a_id": [ "cqpsjmw" ], "score": [ 8 ], "text": [ "hi! you might want to x-post your first question to /r/AskAnthropology; \"cavemen\" are most definitely pre-history so they'll likely be more equipped to tackle that part" ] }
[]
[]
[ [] ]
dwp6p1
How is melanin produced in humans/how does tyrosinase produce melanin?
I'm trying to find a good resource that can explain the enzymatic activity of tyrosinase.
askscience
https://www.reddit.com/r/askscience/comments/dwp6p1/how_is_melanin_produced_in_humanshow_does/
{ "a_id": [ "f7m8v43" ], "score": [ 2 ], "text": [ "The synthesis of melanin is a multi-step synthesis, starting with L-Tyrosine. The first step is the conversion of L-Tyrosine to DOPA. This is an enzyme-catalyzed oxidation reaction in the presents of O2. Basically, Tyrosinase is catalyzing the...
[]
[]
[ [] ]
4abpo9
what is apr, interest, compound interest, principal interest?
explainlikeimfive
https://www.reddit.com/r/explainlikeimfive/comments/4abpo9/eli5what_is_apr_interest_compound_interest/
{ "a_id": [ "d0z0x2t" ], "score": [ 2 ], "text": [ "APR is the effective interest rate that includes every standard fee (it was intended to become a simple way for consumers to shop pricing with everything included, but isn't very well understood). I believe in some loans regulators are beginning...
[]
[]
[ [] ]
qb8rl
how our brain produces "pictures" such as when we are dreaming or remembering a past event
Just as the title says. I don't know if I worded it correctly though, but, when we imagine or dream, we see with our brains, not our eyes. How does this happen? Our mind creating the even again, or along those lines.
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/qb8rl/eli5_how_our_brain_produces_pictures_such_as_when/
{ "a_id": [ "c3w8eis", "c3w8gb3" ], "score": [ 13, 4 ], "text": [ "When you see things with your eyes, certain sets of neurons (or brain cells) are activated in response to certain inputs from your eyes. For example, a particular set of cells activates when you see horizontal lines, anothe...
[]
[]
[ [], [] ]
l6no8
- the impact and benefits, if any, of the dream act
explainlikeimfive
http://www.reddit.com/r/explainlikeimfive/comments/l6no8/eli5_the_impact_and_benefits_if_any_of_the_dream/
{ "a_id": [ "c2q7vz7", "c2q7vz7" ], "score": [ 3, 3 ], "text": [ "Having a bunch of ambitious, young and educated citizens would likely be of great benefit to our country. So would the opportunity to boost military roles and give a path to citizenship to those who are least at fault for t...
[]
[]
[ [], [] ]