q_id stringlengths 6 6 | title stringlengths 4 294 | selftext stringlengths 0 2.48k | category stringclasses 1
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73qlca | When deleting data off hard drives to cover your tracks, why do we often see the drives physically destroyed? | I'm talking about in movies and TV shows, like Mr. Robot, when trying to delete evidence or something on a hard drive/usb drive, often simply deleting it isn't enough. I am aware that simply 'deleting' something doesn't necessarily remove it, (it just sets that chunk of data as available to be written over) and forensi... | Technology | explainlikeimfive | {
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"text": [
"Think of a hard drive like a notebook. Imagine writing important stuff on that notebook really hard. If you do a simple ... | [
"url"
] | [
"url"
] |
73qywf | How did my new HP printer connected itself to my wifi network without me giving it its name and password? | My new HP printer (deskjet 3630) connected itself to my Wifi network. I just installed the HP software on my computer, it searched for printers and found the 3630 and connected it to my computer. I never had to specify which SSID to use or the password. The 3630 has its own SSID, so I can understand how the software fo... | Technology | explainlikeimfive | {
"a_id": [
"dnsp4mf",
"dnsg7iz"
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"text": [
"The printer uses something called [HP Auto Wireless Connect]( URL_0 ). When you install the software on your computer, it obtains your current wireless configuration from Windows and sends it to the printer via its own wireless network. (This may temporar... | [
"url"
] | [
"url"
] |
73qzxl | when you cancel a download where does the data already downloaded go ? | Technology | explainlikeimfive | {
"a_id": [
"dnsg0zf"
],
"text": [
"The space allocated for the entire program, it just becomes unmarked and available for rewriting."
],
"score": [
7
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[]
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} | [
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73rr4z | Why do we need IP address to be connected to internet? Don't we have MAC address already? | I know my question is pretty basic, but what I don't get is **why do we need both addresses to locate a single computer?** In real world, we always have one address, right? So c**ouldn't internet be possible using only MAC address?** MAC addresses are already too many, so there would be no problem like IP address delet... | Technology | explainlikeimfive | {
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"dnsl7uv",
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"dnslaao"
],
"text": [
"The MAC address is just an identifier for your computer (well, your network device, to be exact), but it can't be used to locate it. If I take my computer and fly halfway around the world, I'll still have the same MAC address but I'll be in... | [
"url"
] | [
"url"
] |
73sti6 | Why do some applications hide, often rudimentary, settings behind an 'Advanced' section. | Google Chrome does this for example. | Technology | explainlikeimfive | {
"a_id": [
"dnssl6u",
"dnsu9iu"
],
"text": [
"So technologically-inept people (e.g. your grandma) won't accidentally mess with them and then call you in a panic: \"I've deleted the internet!\"",
"One key element of effective interface design is restricting the number of immediately visible option... | [
"url"
] | [
"url"
] |
73sv7k | Why do TV series' from cable/streaming services like HBO, Netflix or Hulu seem to be so much higher quality than network TV? | Technology | explainlikeimfive | {
"a_id": [
"dnstdzo",
"dnstz3z"
],
"text": [
"Because of advertisers. Since on subscription services most of their revenue comes straight from the consumer they are willing to create more diverse content. So they might not have as many viewers but they're getting more money from less viewers. On netw... | [
"url"
] | [
"url"
] | |
73vzag | Why aren’t we accessing Dark Fiber? | Technology | explainlikeimfive | {
"a_id": [
"dntj36u",
"dntjn7t"
],
"text": [
"The dark (unused or underused) fibers in question usually run between telecom hubs, such as phone company office locations. The big problem in telecom infrastructure is the \"last mile\" -- connecting thousands of buildings to a local telecom hub is expen... | [
"url"
] | [
"url"
] | |
73w2ro | Why was there such a debate between Edison's DC and Tesla's AC? | I have seen so many quarrels over the years, and still we use both, but one was there such a debate and why can't we decide on one? | Technology | explainlikeimfive | {
"a_id": [
"dntk1oz",
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],
"text": [
"you seem a bit confused. We do not use direct current for power transmission over distance, which was the focus of the war of the currents. There is too much loss due to resistance, too much risk of fire, and too much risk of electrocution. Edison was hea... | [
"url"
] | [
"url"
] |
73wmqm | Why does single-serve water typically come in plastic bottles, single-serve soda typically come in aluminum cans, and single-serve beer come in either aluminum cans or glass bottles? | Technology | explainlikeimfive | {
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"dntqocl",
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"text": [
"Beer comes in glass bottles or cans because certain wavelengths of light can damage ingredients in the beer and make it taste bad, and plastic doesn't block those wavelengths like aluminum and gl... | [
"url"
] | [
"url"
] | |
73wzio | Why does it always feels like gaming graphics can't get any better? | Technology | explainlikeimfive | {
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"dntugio",
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"dntrles",
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"text": [
"Because you can’t imagine what they would look like if they could be better, until you see them being better. Then you can’t imagine th... | [
"url"
] | [
"url"
] | |
747qjb | why are unmanned planes/helicopters named after male bees? | Technology | explainlikeimfive | {
"a_id": [
"dnw4gc6",
"dnwc6xe"
],
"text": [
"In the 1930s there was a kind of British plane called the [de Havilland Tiger Moth]( URL_0 ). They made version that was a remote controlled plane to practice shooting at it. They called this the Queen Bee. The Americans saw this was nice, so as a play on... | [
"url"
] | [
"url"
] | |
749f4m | Why do PCs make a beeping sound whenever you press 3 or more keys down? | Technology | explainlikeimfive | {
"a_id": [
"dnwigwt",
"dnwjdr9"
],
"text": [
"> Why do PCs make a beeping sound whenever you press 3 or more keys down? A standard keyboard saves cost by not having individual wires connected to every key but instead conveying a key press as a combination of several signals. To picture how this can w... | [
"url"
] | [
"url"
] | |
74alwt | Why do electronics which have gotten wet, stop working even when they completely dry? | Technology | explainlikeimfive | {
"a_id": [
"dnwsq09",
"dnwrphg"
],
"text": [
"In addition to the damage being done on contact (i.e. creating short circuits leading to immediate or near-immediate failure); tap water, rain/flood water, etc contain a lot of impurities. The evaporated water leaves these behind which may create a delaye... | [
"url"
] | [
"url"
] | |
74bbl5 | Why do websites require complex passwords when anyone trying to brute-force guess your password would get locked out after a few failed attempts? | Technology | explainlikeimfive | {
"a_id": [
"dnwzih5",
"dnwxmli",
"dnxk95l",
"dnwxwm2"
],
"text": [
"You usually dont brute force the website. You use a security hole to steal the hash database and bruteforce that. There you have as many attemepts as you like.",
"Because early data breeches have shown that when passwords... | [
"url"
] | [
"url"
] | |
74f7sk | What is a DDoS? | Technology | explainlikeimfive | {
"a_id": [
"dnxskg1",
"dnxs4bc"
],
"text": [
"Imagine a call center. It has a lot of phones to help ordinary customers. Most of the time only a portion of available phones are being used so everyone who calls in will likely be served. Now imagine you really dislike this call center, maybe you had hor... | [
"url"
] | [
"url"
] | |
74f8k4 | When connecting to a public Wi-Fi hotspot, why is it often necessary to try to go to an http://, and not an https://, webpage to get the sign-in screen to show up? | Often, when I attempt to access public Wi-Fi hotspots - in places such as coffee shop chains - that feature sign-in pages or require the user to click "I Agree" or "OK" to begin using the Wi-Fi, the sign-in page will not be triggered until I have typed in and attempted to visit an unsecured (http://) webpage. If I try ... | Technology | explainlikeimfive | {
"a_id": [
"dnxs7k8",
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"dnxryf5"
],
"text": [
"The sign up page works by directing your request for http:// URL_0 / to a server controlled by the wi fi provider. That server then responds pretending to be URL_0 , telling your browser to go to URL_2 instead. That works fine for HTTP, but... | [
"url"
] | [
"url"
] |
74g43g | Would a fully 1 to 1 life-like virtual reality ever be possible? | Technology | explainlikeimfive | {
"a_id": [
"dny56eu"
],
"text": [
"Hypothetically, yes. Assuming we have no limitations on processing power, it's already quite common for graphics to be realistic enough (just check any trailer for a First Person Shooter to see what I mean). Projecting this in a fully 3d space is hard, but let's stick t... | [
"url"
] | [
"url"
] | |
74gfe5 | What prevents video game developers that have digital content get sold by third parties from creating the content themselves and selling it? | Technology | explainlikeimfive | {
"a_id": [
"dnz5iaa"
],
"text": [
"If you mean officially, why would they conceal it? They could simply sell any skins they wanted through an official store. IF you mean an individual developer, that would be at minimum a breach of their employment contract at at worse a fraud charge."
],
"score": [
... | [
"url"
] | [
"url"
] | |
74hqg8 | Whats the difference/distinction between semi-automatic and automatic weaponry and what are/how do Bump Stocks turn Semi-Autos into Automatic weapons? | Technology | explainlikeimfive | {
"a_id": [
"dnyd9oj"
],
"text": [
"A semi-automatic firearm fires one bullet each time the trigger is pulled. To fire a second shot the trigger has to be released and pulled again. An automatic will keep firing as long as the trigger is pulled and isn't released. Bump Stocks don't turn semi-auto's into a... | [
"url"
] | [
"url"
] | |
74i7un | Why is it necessary for generator engine size to increase as output voltage increases? Is it possible to run a 50Kw generator with a tiny 1000cc engine? | Technology | explainlikeimfive | {
"a_id": [
"dnyhjq2",
"dnymvqo"
],
"text": [
"Voltage has nothing to do with generator size, power does It is totally possible to run a 50 kW generator off a 1000 cc engine, 50 kW is only 67 HP. It's a very different story if you want a 50 MW generator, that'd be 67,000 HP so you're going to need a r... | [
"url"
] | [
"url"
] | |
74imvb | How do online games run? | When you install a video game on your PC or Console, the sounds, textures, models, etc. are saved to the hard drive and the game loads them up when you run it. How do flash games and things like that run? Does it need files? | Technology | explainlikeimfive | {
"a_id": [
"dnyn1av"
],
"text": [
"Your computer cannot show you anything from the internet without downloading what it wants to show you from it first. Online games run like every other game. The game logic and all accompanying assets such as sounds, models, textures, sprites, whatnot, are downloaded an... | [
"url"
] | [
"url"
] |
74jbq9 | Why is it so difficult to stop spam phone calls? | Technology | explainlikeimfive | {
"a_id": [
"dnyqzhc"
],
"text": [
"Because (mostly) they come from countries where they don't have to follow your laws. So they don't, and there's nothing you can do about it."
],
"score": [
34
],
"text_urls": [
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} | [
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74kfp8 | why can modern wall adapters be plugged in either way? | most wall outlet plugs only fit one way here in the US due to one being wider than the other, however all of my USB to wall adapters are reversible. when did this happen and how does it work? | Technology | explainlikeimfive | {
"a_id": [
"dnz0cpn"
],
"text": [
"UL rules are if you can prove neither prong can accidently electrify anything outside the charger you don't need a polarized plug (a plug that fits one way). Generally that would be devices with an entirely plastic case (so a lose wire can't electrify anything) and full... | [
"url"
] | [
"url"
] |
74l1qd | What is the advantage of having "custom silicon" on your hardware products (like that popular smartphone does)? | Technology | explainlikeimfive | {
"a_id": [
"dnzcweu"
],
"text": [
"Custom silicon is smaller, better, and more power efficient than building electronics out of more generic building blocks. Just like injection molded plastic is superior to building your product out of LEGO. The only reason we don't build everything out of custom silico... | [
"url"
] | [
"url"
] | |
74l25n | Does Moore's law protect us from the singularity? I understand both a little, but not enough to know the answer. | Technology | explainlikeimfive | {
"a_id": [
"dnz7fw1",
"dnz5z84"
],
"text": [
"Moore's law is hardly a \"law\". He essentially saw a historical trend for the number of transistors on a processor and made a statement about what he thought was going to happen in the future. Generally speaking though, it's not a sound argument to extra... | [
"url"
] | [
"url"
] | |
74m14p | how do telescopic sight or scope in sniper rifle work? The scope is few inches higher than the bullet line so how are the bullet hit the mark in the scope? | Just like the title. And super sorry for my english. my Third language | Technology | explainlikeimfive | {
"a_id": [
"dnzdj4u"
],
"text": [
"[Here is a helpful diagram]( URL_0 ), that shows an exaggerated view of what's going on. Bullets don't travel in a straight line, despite what it might look like. They travel up and then down in an arc, called a ballistic arc or path, just like throwing a football. Ligh... | [
"url"
] | [
"url"
] |
74mprl | If font 'points' are a fixed size (1/72"), why does one font at 10 pt (e.g. Calibri) look appreciably smaller than another (e.g. Verdana) at the same point size? | [This is what I mean]( URL_0 ). | Technology | explainlikeimfive | {
"a_id": [
"dnzrfkn",
"dnzljt6",
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],
"text": [
"The point size is the overall height of the space where the letters are drawn. The letters don't actually need to completely fill that height (some letters can be shorter than others and they might not even fill the space). [This is what I ... | [
"url"
] | [
"url"
] |
74n5co | Why can’t/don’t ATMs give you money in denominations smaller than $20 these days? | Technology | explainlikeimfive | {
"a_id": [
"dnzkw32",
"dnzmg8s",
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],
"text": [
"It's how they are setup . Every ATM has canisters in them filled with cash and only so much can fit in them so the people who own the ATMs decide to put only 20s in there so they can fit more money in there. The ATM at my old job had one th... | [
"url"
] | [
"url"
] | |
74o7r2 | If spiders' webs are the strongest fiber in the world. Why are not used as a material to build or create artifacts? | Technology | explainlikeimfive | {
"a_id": [
"dnzt8oc",
"dnzt43r",
"dnzy42m"
],
"text": [
"It is really stretchy, like insanely stretchy, it may stop a bullet, but it will be behind you after passing through you. Spider silk is an amazing material, but it is insanely hard to get hold of, it took four years to get enough for a clo... | [
"url"
] | [
"url"
] | |
74oru6 | SMB vs FTP | What's the difference between SMB and FTP? We're doing this in class and we just finished doing both protocols but I still can't wrap my head around these 2 subjects. Thank you in advance! | Technology | explainlikeimfive | {
"a_id": [
"do00oza",
"do0g2cv"
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"text": [
"This isn't *exactly* what ELI5 is for, as you probably want something a bit technical. The ELI5 is that FTP is meant for plain old transferring files. SMB is more robust than that, and while you *can* transfer files you can also use it as a remote filesys... | [
"url"
] | [
"url"
] |
74py7b | How do programmers incentivize AIs | I often see it stated with little explanation in articles about AI research that programmers use incentives to get Artificial Intelligences to do certain tasks. They never say what the incentive is or how it works. How exactly does one go about giving an AI an incentive and what would that incentive be? | Technology | explainlikeimfive | {
"a_id": [
"do07wtu",
"do07wr2"
],
"text": [
"Incentive is a misleading word. It's just a weight. Let's say it can do action A, or action B 50/50. If it picks right, you up the score +5, if wrong, -5. So if an answer should be A, and the AI picks A, it becomes 55/45, with a stronger weight towards A ... | [
"url"
] | [
"url"
] |
74rqjg | Does having a random alpha+numeric+symbol password reduce exposure in compromised email data breaches? | Just received notice from haveibeenpwned that my email is part of multiple data breaches. when email info is compromised, what are the capabilities? I assume the hackers gained access to the salted hash password file. does having a random string strong password reduce exposure of brute forcing via rainbow? does a passw... | Technology | explainlikeimfive | {
"a_id": [
"do0svks",
"do0si2m"
],
"text": [
"Brute forcing isn't the only way hacker try to guess passwords massively. One of the most common ways is through \"dictionary attacks\", and could be refined through word association. In your example, the password \"jD02j-#2Ao\" has 10 characters, and you... | [
"url"
] | [
"url"
] |
74wto6 | Cell Phone Reception | My question is, why does cell phone reception always suck when there are a lot of people in one area? I was just at the expo for the Chicago marathon and couldn’t call my brother that I needed to talk to. Thanks in advance! | Technology | explainlikeimfive | {
"a_id": [
"do1oz79"
],
"text": [
"Think of it as a noisy room. Think of the situation like this. In an empty room, you and your friend can talk to each other just fine. Then another two people walk into the room and also start having a conversation, but no problem because you and your friend can still u... | [
"url"
] | [
"url"
] |
74wvlx | why does the higher number of Frames per second equal to slow motion. Like why is 60fps a “normal speed” but 240fps considered Slow Motion. Why is 120fps not slower motion than 60? | Technology | explainlikeimfive | {
"a_id": [
"do1o0ok",
"do1nzt1",
"do1oaku"
],
"text": [
"What makes something slow motion is when it's recorded at a higher frames per second than it's played back at. We normally play video back at 60 FPS. So if you record at 120 FPS and play at 60 FPS, the video is twice as slow, since every fr... | [
"url"
] | [
"url"
] | |
74xn9k | What's the big hurdle in getting people to Mars? Haven't the major obstacles to doing so already been solved? | I mean, we have: * Rockets to get materials to orbit * Capsules that can keep astronauts in space for a long time (i.e., ISS) * Relatively frequent unmanned missions to Mars That is: we can get people into space, in capsules that will *keep* them in space, and the ability to shoot those packages to Mars. I *feel* like ... | Technology | explainlikeimfive | {
"a_id": [
"do1v00a",
"do1ul4m",
"do1ub2b",
"do1uogj"
],
"text": [
"Mars lines up with the earth about once every two years, so any mission would have to last at least that long, and would have to bring all the food, water, and oxygen needed for a stay that long. We don't have a rocket capabl... | [
"url"
] | [
"url"
] |
74yixg | how did clocks and time pieces work before batteries/electricity? | Technology | explainlikeimfive | {
"a_id": [
"do21qxj"
],
"text": [
"You may have seen a pendulum swinging under a [grandfather clock]( URL_1 ). One neat thing about pendulums is that the period of the swing (that is, how long it takes to swing back and forth) depends on the length and weight of the pendulum, not how far it's swinging, s... | [
"url"
] | [
"url"
] | |
74yvtb | How are we able to manufacture super small objects? | Like the transistors in a cpu for example. | Technology | explainlikeimfive | {
"a_id": [
"do25819",
"do25ekl"
],
"text": [
"1) Print a pattern of the thing you want to make on a piece of photographic film. 2) coat a piece of silicon with a special material (called \"resist\") that hardens when light strikes it. 3) use a reducing lens to project that image, smaller, onto the si... | [
"url"
] | [
"url"
] |
74z16q | What is happening when a website goes down because of too many people try trying to access it? | Technology | explainlikeimfive | {
"a_id": [
"do26w0h"
],
"text": [
"Somewhere within the computers the website runs on, some resource is being exhausted and can't handle the volume of work demanded of it. The rest only other components have to slow down, web requests get more and more backed up unlike the site comes unusable. The exact ... | [
"url"
] | [
"url"
] | |
751is6 | eSIM, the tech behind Google Fi | Read this [article]( URL_0 ) which says how Pixel 2 is equipped with eSIM and would be able seamlessly switch between networks, thanks to Google Fi project. How does this eSIM works in real? | Technology | explainlikeimfive | {
"a_id": [
"do2so0a"
],
"text": [
"At the heart of it, a SIM card is basically a unique identifier that is used to tie your account to a device. Your SIM card is actually just a number that boils down to something like this... FG567-56721-65431-124AB-1212Z That's not the exact format of a SIM identifier ... | [
"url"
] | [
"url"
] |
751qnk | How does coding actually work? | So, from what I understand a code is a line of instructions that build websites, games, programmes on computers etc. To do this you use a coding programme. That coding programme will have been built with a code, using a coding programme. That coding programme would have also been built with a code using a coding progra... | Technology | explainlikeimfive | {
"a_id": [
"do2uujw",
"do2qfbu",
"do2qxdi"
],
"text": [
"Here is my explanation, from a computer engineering perspective. Sorry about the wall of text, hopefully it's helpful. Reducing it all the way down, code maps to transistors. Think of transistors like little on/off switches in a circuit. Ap... | [
"url"
] | [
"url"
] |
751ro0 | The location methods used by explorers like Columbus to record their findings and navigate home | Technology | explainlikeimfive | {
"a_id": [
"do2qnew"
],
"text": [
"[Columbus was the first sailor who kept a detailed log of his voyages. We therefore know how Columbus navigated, and that he was a dead reckoning navigator. On the first voyage westbound, Columbus sticks to his (magnetic) westward course for weeks at a time. Only three ... | [
"url"
] | [
"url"
] | |
751sdn | Why does resetting my phone often fix bad signal strength? | Technology | explainlikeimfive | {
"a_id": [
"do2qnnk",
"do3ncz8",
"do38quc"
],
"text": [
"Doing a reset wipes the cache files. These can cause random software issue. In the case of signal, resetting the phone forces it to restart searching for signal.",
"1. When restarting your phone, or toggling airplane mode on or off, it ... | [
"url"
] | [
"url"
] | |
7524x4 | Electricity and the difference between volts, amps, watts, etc. | Technology | explainlikeimfive | {
"a_id": [
"do2tn7w"
],
"text": [
"A good metaphor for electricity is water flowing through a river. So, voltage is the speed of the water flowing through the river, amperage is how much water is flowing trough the river and resistance (Ohm) is the resistance of the flow. There are always some obstacles ... | [
"url"
] | [
"url"
] | |
752b1f | What exactly are "frames" in video games, and how do you quantify them? | I hear so much talk about the amount of frames per second in video games and I understand roughly that more frames per second=better graphics, but how can you tell the amount of frames per second a game has without explicitly being told, and why are they so important? | Technology | explainlikeimfive | {
"a_id": [
"do2uo1c",
"do2uu4a",
"do37ohs"
],
"text": [
"A video is just a rapid sequence of pictures, or frames. Once you get too few pictures per second, the movement doesn't seem smooth anymore. By increasing the number of pictures shown to you every second, you decrease the probability of tha... | [
"url"
] | [
"url"
] |
752bwn | what is Ngnix ? when and why should you use it for your app? And how would you integrate it with the cloud-hosting services such as heroku? | I keep running into Nginx everywhere I go, I read its a web server and all but it was slightly confusing and I didn't understand when I would need to use it or if I should And more importantly how? Something about all the examples stumped me. | Technology | explainlikeimfive | {
"a_id": [
"do2xovt",
"do398ey"
],
"text": [
"It is a solution to the C10K problem. With a typical web server, each HTTP request is a thread, and most computers start have serious performance problems once they reach a certain number of threads (sometimes, but not always about 10,000 threads). At tha... | [
"url"
] | [
"url"
] |
752mam | The artificial nose technology used in food processing | Recently, I heard that there are machines which can differentiate between ripe and damaged foods by SMELLING them and they are used in food processing and manufacturing. Can anyone explain me what is the machinery and how it can do such a complex task? | Technology | explainlikeimfive | {
"a_id": [
"do2z1yp",
"do31589"
],
"text": [
"Most foods give off some very specific chemicals when rotting. So the \"artificial nose\" is not very fancy -- it's just a gas chemical detector, and when too much of one indicator chemical is present, it marks that this item is rotting.",
"It probabl... | [
"url"
] | [
"url"
] |
7550rg | If hackers are using "brute force" password guessing, why can't websites lock them out after too many guesses like they do legitimate users? | Technology | explainlikeimfive | {
"a_id": [
"do3hfuh",
"do3i936",
"do3icuo"
],
"text": [
"That's exactly what happens. However, when there is a leak (data security breach) and they get their hands on the encrypted password file, then they get infinity tries to decrypt it.",
"Generally speaking, websites do have timed lockout... | [
"url"
] | [
"url"
] | |
755m4f | Why are audio jacks round while charging and other ports are rectangular? | Technology | explainlikeimfive | {
"a_id": [
"do3mpja",
"do3mvl7"
],
"text": [
"Audio jacks and *some* charging ports use so few wires that they were able to use a \"coaxial\" round design. This enables them to be connected in any orientation, and to rotate freely in the socket, both of which are advantages. These connectors don't wo... | [
"url"
] | [
"url"
] | |
756le4 | why do we have 4k monitors and 144 Hz monitors, but not 4k 144 Hz monitors? | Technology | explainlikeimfive | {
"a_id": [
"do3w8z6",
"do3x7bv",
"do400k6"
],
"text": [
"144 Hz 4K video requires so much data that only the DisplayPort version 1.4 can support it and it was only published in March 2016. Even that requires use of Display Stream Compression which is a mostly lossless form of data compression. Ba... | [
"url"
] | [
"url"
] | |
7577ap | With all the stuff happening around YouTube’s policy towards content creators, why can’t they move/create a new alternative to YouTube? | Technology | explainlikeimfive | {
"a_id": [
"do40r0j",
"do4c77x",
"do43ohb",
"do407f0"
],
"text": [
"They can move, there are other sites that you can host videos on. Dailymotion, Vimeo, or their own website, are all viable options. However, there's a pretty big downside. They don't have large audiences. For every successful... | [
"url"
] | [
"url"
] | |
759ohg | Why deploy all 10 Iridium-3 Satellites in the same location? | I'm referring to the launch this morning: URL_0 I've played KSP a bit, so that may be getting in the way of me understanding this. I would think, the satellites are going the exact same speed as the delivery vehicle they're attached to. During separation, they aren't being propelled away more than the separation force ... | Technology | explainlikeimfive | {
"a_id": [
"do4g7hg",
"do4itst",
"do4httz",
"do4gr2y"
],
"text": [
"The satellites presumably have a small amount of fuel on board. It doesn't take much fuel to tweak your orbit a bit to get the satellites all following the same orbit but spaced out around the orbit. Just dumping a satellite ... | [
"url"
] | [
"url"
] |
75bn7o | If the human brain is such an incredible computer, why is a humble calculator quicker and more accurate? | *at math... | Technology | explainlikeimfive | {
"a_id": [
"do4w32u",
"do4x7b6",
"do4w9mw",
"do4waih",
"do4wdj8"
],
"text": [
"The human brain is *not* an incredible computer at certain tasks, such as math calculations. I mean, it's incredible compared to many other brains, and even some of the earliest electronic computers. But it isn... | [
"url"
] | [
"url"
] |
75e2mr | why dont they make a USB connected laptop charger? | Technology | explainlikeimfive | {
"a_id": [
"do5hd6o",
"do5hb7b"
],
"text": [
"They did, and they have. The primary reason usb wasn't used is because people are prone to killing their usb cables by constantly putting it in the wrong way, that's just the last thing you want from a cable. But, with the advent of USB-C quite a few lapt... | [
"url"
] | [
"url"
] | |
75gcyc | How do countries with multiple timezones have different TV channels? | I'm from New Zealand, which has one timezone, so it's just one TV broadcast. However, countries with multiple timezones, like Australia, USA/Canada, Russia etc have multiple timezones. Suppose I live in New York, on the East Coast, and I have a friend in Los Angeles, on the West Coast. How would TV channels and station... | Technology | explainlikeimfive | {
"a_id": [
"do5zxmi",
"do601vt"
],
"text": [
"First lets talk about network TV. In the US there are 4 major networks. NBC, CBS, ABC and FOX. These networks have affiliates in different markets. NBC has 222 affiliates which show the national feed, and also run their own programming for local news, loc... | [
"url"
] | [
"url"
] |
75idsk | Are Rechargeable Batteries Better Fiscally/Environmentally vs. Disposable Ones? | Technology | explainlikeimfive | {
"a_id": [
"do6eh78",
"do6eu2a",
"do6gj2a"
],
"text": [
"Fiscally no question they are better. Environmentally I am unsure. But the energy required to charge a AA battery costs pennies so assuming you use them regularly they will make their money back quickly.",
"Because you only buy them onc... | [
"url"
] | [
"url"
] | |
75kr2z | Why do "download speeds" and actual update/install speed differ drastically? | I'm sure many people have experienced this - but I'm so fed up with these installs and updates taking hours. When installing that includes a "MB/s" counter, the install begins with something like "5MB/s" and then slowly slips into the "8KB/s" range. This is all while my speeds, according to URL_3 , are somewhat high. S... | Technology | explainlikeimfive | {
"a_id": [
"do6xiwt",
"do6xb2q"
],
"text": [
"There are three major factors that determine the speed of a connection to a given website or server. * Your connection speed to the internet via your ISP * The website/server's connection speed to the internet via *their* ISP * The amount of traffic on th... | [
"url"
] | [
"url"
] |
75muje | How are those who use card skimmers and other means of fraud not immediately traced and prosecuted? | Technology | explainlikeimfive | {
"a_id": [
"do7ewda"
],
"text": [
"It can be extremely difficult to determine who placed a skimmer, especially if the placement was done stealthily. The skimmer itself should contain little to no personal details about who placed it. Some skimmers can communicate wirelessly and may never be physically re... | [
"url"
] | [
"url"
] | |
75qiho | is it possible to see within pixels? | Technology | explainlikeimfive | {
"a_id": [
"do84qjh"
],
"text": [
"The results you are seeing are errors introduced by the image compression process. Pixel-based digital image files have a maximum number of pixels, and smaller that that there is actually nothing. There *are* images described in ways other than pixels, using math. Some ... | [
"url"
] | [
"url"
] | |
75rkii | How is a timetable for frequent rail service (e.g. the London Tube) made, with trains arriving every few minutes and sometimes different lines? | Technology | explainlikeimfive | {
"a_id": [
"do8ivlw"
],
"text": [
"Well they know exactly how long it should take for a train to do the run, how long it is between each station and how long they need to stay at each station. They'll typically measure these numbers and record all of them (for new lines this might be done by running empt... | [
"url"
] | [
"url"
] | |
75t265 | Whyvare some digital watches faster or slower than others? | Technology | explainlikeimfive | {
"a_id": [
"do8qzw0"
],
"text": [
"Nothing is perfect, there is always some error. In digital clocks there is a circuit called an oscillator. It's the electronic equivalent of a pendulum, but instead of an object moving the same path at a fixed rate there is a voltage that swings up and down at a fixed r... | [
"url"
] | [
"url"
] | |
75t4nf | Does water in spaceships short circuit anything? | Technology | explainlikeimfive | {
"a_id": [
"do8q7nu"
],
"text": [
"Yes and no. The vast majority of exposed electronics on the ISS are carefully sealed and protected, just in case there's an inadvertent water spill. The stuff needed to maintain normal function is safe, and so is the really expensive equipment used for experiments. Howe... | [
"url"
] | [
"url"
] | |
75u4jq | How do computer board designers change and update parts like GPUs and motherboards to be compatible with all types of new and old standards, and make them faster, so quickly? | Technology | explainlikeimfive | {
"a_id": [
"do8zob1"
],
"text": [
"In a word: Standards. If your part doesn't comply with the standards for that part, it won't work with anything else. Which means nobody will buy it. New standards are sometimes backwards-compatible. Sometimes they are not - so part manufacturers don't *always* make stu... | [
"url"
] | [
"url"
] | |
75yltj | How do you “crack” a game? Why can’t you just send the files of the game to someone so they can play it? | Technology | explainlikeimfive | {
"a_id": [
"doa0ahn"
],
"text": [
"Developers of games and other software don't want people to buy one copy then upload it online and have everyone else use it. To prevent it, there may be a number of different techniques implemented in the software that only allows the software to run under certain cond... | [
"url"
] | [
"url"
] | |
760h8m | How do domains work, like .com .ru? Why can sites like discord use a custom domain like .gg? | Technology | explainlikeimfive | {
"a_id": [
"doabppg"
],
"text": [
".gg isn't a \"custom\" domain. It's a top level domain registered to \"the crown dependency of Guernsey\" (I've never even heard of the place). The little small countries like Guernsey have TLDs allocated to them and then they can either hold on to them or turn around a... | [
"url"
] | [
"url"
] | |
762303 | If computer code is written in a software interface, what did the person who wrote the code for the interface use? | Technology | explainlikeimfive | {
"a_id": [
"doaqfyt"
],
"text": [
"The very first programs were written by physically setting switches by hand Then came punch cards and tape which could set switches automatically Once you move to \"writing\" you're talking about writing in assembly. There are basic instructions and how to execute them ... | [
"url"
] | [
"url"
] | |
7629pb | What does NASA use their 90Gb/s internet speed for, and why does it have to be so fast? | Technology | explainlikeimfive | {
"a_id": [
"doasd9l"
],
"text": [
"I am unsure as to the specifics, but no one can argue against NASA having an insane amount of data on hand. They also have a fair number of locations to which large amounts of data may need to be sent for various research purposes. They need it to be fast since very lar... | [
"url"
] | [
"url"
] | |
762d05 | A.I. "was never shown what walking looked like" and yet "taught itself to walk" | [This animation of an AI "learning" to walk.]( URL_0 ) * What does it mean that the AI was "never shown what walking looks like". Wouldn't the programmers have to provide a finite number of possible configurations of parts, or simple limitations, which would effectively feed the AI the answer to "this is walking"? * Wh... | Technology | explainlikeimfive | {
"a_id": [
"doatftd",
"doat19l",
"dob3tl4",
"doaz9er",
"doato8t"
],
"text": [
"The programmers start by setting up an environment--some sort of basic physics engine, much like you might find in a modern game. Within this engine, they design the physical structure of the model that they wa... | [
"url"
] | [
"url"
] |
762w7k | What prevents a penetration tester to simply not report a security weakness and then in the future uses it for his own unethical hacks? | Technology | explainlikeimfive | {
"a_id": [
"doawsxo"
],
"text": [
"The short answer is morals and reputation. \"White Hat\" hackers make ridiculous amounts of money doing what they do because they have good reputations and skills. If it's ever shown that they didn't report an exploit that means they are either not good at what they do ... | [
"url"
] | [
"url"
] | |
764jql | How do cell phone cameras adjust focus without any moving parts? | Technology | explainlikeimfive | {
"a_id": [
"dob782d"
],
"text": [
"They do have moving parts. A really, *really* tiny linear electric motor moves the lens forward and backward. URL_0"
],
"score": [
45
],
"text_urls": [
[
"https://www.westfloridacomponents.com/blog/how-does-a-smartphone-camera-autofocus/"
]
]... | [
"url"
] | [
"url"
] | |
765u0l | Why is it hard to implement a standard volume across various mediums like radio and television? | Differences in recording equipment and technology, conversion from analog to digital signals, processing/remastering and the disparity between mediums (radio vs. television vs. podcasts, etc.) lends itself to making a standard hard to define. Here we are, well into the 21st century and even within the same podcast I ha... | Technology | explainlikeimfive | {
"a_id": [
"dobqikk",
"dobjsqe",
"dobp1mj",
"dobv8ft"
],
"text": [
"Hey there I work for 2 major broadcasting companies in Canada, and in one (where I currently am, on a 10 hour shift) I am the person who ingests, quality checks, and approves all the commercials we air across all of our 7 cha... | [
"url"
] | [
"url"
] |
767kyu | How does a radio station send metadata like song name to my car's radio? | I was driving in my car, and for the first time noticed that the name of the current song on the radio was scrolling across the little LCD screen, and I wondered how that metadata works from the radio station's perspective. | Technology | explainlikeimfive | {
"a_id": [
"dobwoc6",
"doc0znu"
],
"text": [
"Modulation became more efficient, which opened up space in the guard bands to transmit digital information on a sub carrier. Edit : okay imagine that while recording the song the radio station was tapping out a special code in the background of the song t... | [
"url"
] | [
"url"
] |
76cybb | Why, especially in older software, does software load times not decrease significantly with a faster SSD? | Upgrade computer storage that is 100 times faster than your old one, but that program barely opens or loads any faster. Why? | Technology | explainlikeimfive | {
"a_id": [
"doczpjt",
"doczqd3"
],
"text": [
"The SSD only speeds up one aspect: retrieving the code storage. Starting a program often involves other steps -- computations that are limited by the CPU, or network communications, unaffected by the SSD.",
"I would have to guess probably the efficien... | [
"url"
] | [
"url"
] |
76f16z | What does it mean when a game or movie has been "remastered"? | Technology | explainlikeimfive | {
"a_id": [
"dodh0i8"
],
"text": [
"When a movie is shot, it used to be shot on a roll of film, in high quality. That roll of film is called the Master. Maybe you'll remember cassette tapes, they used to have a box for you to tick for Master and Copy. When you copy the master onto a new medium, or simply ... | [
"url"
] | [
"url"
] | |
76gida | Why do digital time displays, such as a microwave or oven, seem to flash constantly on video? | Technology | explainlikeimfive | {
"a_id": [
"dodwixv",
"dodtjmu",
"dodxfxv"
],
"text": [
"Those LED displays save money by sharing the wires between segments. So you'll have a 7 segment display and it has 7 wires each connected to one segment for all digits, and then 4 wires that are connected to all segments but one digit. They... | [
"url"
] | [
"url"
] | |
76htpp | What is the difference between a GPU and a CPU? Which would yield higher gaming performance? | I'm trying to upgrade my computer for the first time ever. It was a prebuilt one that is seven years old now. I'd like to think I am knowledgeable in the subject but I'm really not. I don't have a lot of money so if I were to buy one thing that would help me catch up to play better looking games I need to understand th... | Technology | explainlikeimfive | {
"a_id": [
"doe4y3p",
"doe4f63"
],
"text": [
"Both the CPU and GPU are used to process a \"frame\" of a game. Broadly speaking, the CPU works out where all the objects in the game are by taking your input, simulating physics, running game logic and so on. It then passes that information onto the GPU ... | [
"url"
] | [
"url"
] |
76hztw | What does the big machine for (i believe) asthma do? | So just to clarify, its this big machine thing where you have the little like drips of liquid that you put into the machine and then have this mask thing hooked up to your mouth. (details may differ from actual machine as i havn’t touched my machine in years and technology is advancing quite quickly) | Technology | explainlikeimfive | {
"a_id": [
"doe5998"
],
"text": [
"If you're talking about a Nebulizer, they vaporize medication into a mist that can be easily breathed into the lungs. Yes, the machines used to be large unwieldy things. But you are correct in that technology has improved quite a bit. My sister uses one that is only a b... | [
"url"
] | [
"url"
] |
76k17e | How can HDDs and SSDs delete data faster than they can write? | Technology | explainlikeimfive | {
"a_id": [
"doeivj1",
"doej5ks"
],
"text": [
"When you delete something, you're not actually removing it from the drive. Instead, the computer is just telling itself to recognize the space as free and writable. Once you start saving new documents, downloading new music, etc. the \"deleted files\" (wh... | [
"url"
] | [
"url"
] | |
76kpmx | how did humans even create computers ? | Technology | explainlikeimfive | {
"a_id": [
"doepjp6",
"doepm7n",
"doet4uq"
],
"text": [
"Computers weren't created all at once. It took baby steps and new technologies, like microtransitors, to be invented to progress them to where they are today.",
"The history of computers is a whole topic in itself, and the first \"compu... | [
"url"
] | [
"url"
] | |
76kr62 | Why does putting receipt paper over a debit card make it work when it wouldn't scan otherwise? | Technology | explainlikeimfive | {
"a_id": [
"doeprjp"
],
"text": [
"Oh boy, I can try to explain it to an adult but even that is somewhat difficult, a five year old is a lot harder. Magnetic strips contain information that is stored in small magnetized particles which the card reader detects. These particles are put into specific sectio... | [
"url"
] | [
"url"
] | |
76nfe1 | How do tape recorders adjust for the differences in spool sizes? | I just started watching Mindhunter on Netflix today (really good show btw). The opening title sequence shows an old tape recorder being nicely setup and turned on. Once the recorder turns on I immediately noticed that the winding spool is spinning faster than the unwinding one. Pretty obvious actually (the smaller spoo... | Technology | explainlikeimfive | {
"a_id": [
"dofdh1e",
"dofdsvm"
],
"text": [
"The speed of the tape isn't controlled by the speed that the reels turn, it's the other way around. Part of the tape path, usually just after the heads, is a cylindrical drive called the [capstan]( URL_0 ), and a pinch roller to hold the tape against the ... | [
"url"
] | [
"url"
] |
76q9rq | Telephone/Transmission/Utility Poles. What are the different components? | Driving to work and the thought crossed my mind. Besides the transformers what are all the other components on it? What all is carried data wise? Whats the ordering of cables? What are all the various boxes on it? Thanks in advance | Technology | explainlikeimfive | {
"a_id": [
"dofvvtt",
"dofx5hw",
"dofvrx5"
],
"text": [
"Can answer for Transmission towers at least. [I'll use this picture as a reference.]( URL_0 ) The uppermost single wire running across the top of the tower is a grounding wire, meant to keep towers at the same electric potential and to prot... | [
"url"
] | [
"url"
] |
76soxd | How companies track your browsing history. | For some background info, I'm at Uni and I was browsing through some products on my phone in my room. I went to the Computer lab and logged in. I found the same products i was looking at. Nothing NSFW i was just wondering how exactly they do that. I was on two different accounts. | Technology | explainlikeimfive | {
"a_id": [
"doggy7j"
],
"text": [
"The more relevant an ad is, the more likely you are to click on it. Relevance and high quality clicks are encouraged and prioritized by ad networks like Google and Facebook, and result in cheaper costs to the advertiser and a higher likelihood of the user completing a s... | [
"url"
] | [
"url"
] |
76v2q2 | is the computer ram's lifespan affected by the load | I run virtual machine, and the ram load is always at around 90%. Will this shorten the ram lifespan? | Technology | explainlikeimfive | {
"a_id": [
"dogy2gz"
],
"text": [
"No. First even if your computer shows 90% usage your OS will really be attempting to use 100% of your ram all the time, the other 10% is being silently used for things like caching files and file system data. Second the way that DRAM works means that every bit of ram is... | [
"url"
] | [
"url"
] |
76wxin | Why do android phones get slower over time even after a factory reset? | Often the common complaint would be of cache, data or new updated apps, but I've seen them get slower than a brand new phone even without any updated apps. | Technology | explainlikeimfive | {
"a_id": [
"dohbkyd"
],
"text": [
"This is just speculation tbh. Over time, the same applications on your phone consume more resources. This is because the rate technology improves is swift, and application devs are constantly keeping up. So say an app is currently built to run well on a phone with 1GB R... | [
"url"
] | [
"url"
] |
76xntl | Do larger camera sensor pixels capture more light, making the image brighter? | Actually, while thinking of this question, I suddenly thought of rain gauges, where the size of the gauge doesn't matter when measuring rainfall... does this apply to pixels as well? Or does larger pixels mean brighter images? | Technology | explainlikeimfive | {
"a_id": [
"dohhc50"
],
"text": [
"Larger pixels mean more light. Smaller pixels mean more amplification is required to achieve the same brightness and the result is noisier images. Both the sensor and the amplification electronics generate random noise and having a strong signal due to more light minimi... | [
"url"
] | [
"url"
] |
76zfcd | Why nearsighted people need glasses to see objects "far away" in virtual reality, even though the screen is very close. | I've wondered this ever since I got my vive. I'd think I wouldn't need to wear my glasses since the screen is right up to my face. | Technology | explainlikeimfive | {
"a_id": [
"dohsjw5"
],
"text": [
"Because the headset uses lenses to place the screen at an optical distance that is much further away. You'll notice that you don't have to focus your eyes in the same way as if you put your phone screen right in front of your face."
],
"score": [
5
],
"text_... | [
"url"
] | [
"url"
] |
76zoh9 | Why is closing a crashed game on PC so difficult? | Technology | explainlikeimfive | {
"a_id": [
"dohuzxj",
"doi5p34"
],
"text": [
"Because you're telling the OS \"send this game a message telling it to shut down.\" If the game is responsive that's not a problem, the game hears the message and turns itself off. If the game crashed or in any other way is unresponsive you're talking to ... | [
"url"
] | [
"url"
] | |
7708v8 | How is this new forged carbon stuff stronger than traditional carbon fiber? | To me, it seems like the consistent, alternating layers of traditional carbon fiber would be stronger than the much more randomly oriented and spaced fibers of forged carbon. | Technology | explainlikeimfive | {
"a_id": [
"doi6ax3"
],
"text": [
"Without going and reading about this 'stronger' typically means a specfic type of strength - how hard you have to pull on both ends to tear it. In which case an obvious example is plastic. Plastic polymers look like a heap of tangled worms at an atomic level, and this g... | [
"url"
] | [
"url"
] |
770ab6 | Why does JSON seem to be replacing XML? | Technology | explainlikeimfive | {
"a_id": [
"doi1ks3",
"dohzm64",
"doi3jmh"
],
"text": [
"Xml is very verbose and requires more data to be transmitted. Specifically the ending tags. Xml: < Person > < handle > krystar78 < /name > < redditID > 12345 < /redditID > < /person > Json: { handle: 'krystar78', redditID:12345 }",
"XML... | [
"url"
] | [
"url"
] | |
771a2a | Why does it take 3-5 days for an email service to unsubscribe me from their list? | It just seems like this should be able to process within a few minutes and not a few days. | Technology | explainlikeimfive | {
"a_id": [
"doi8235"
],
"text": [
"It doesn't, they're just covering their asses in case there was an email being sent to you by some server somewhere in the pipeline. Unsubscribe requests filter into lists gradually."
],
"score": [
3
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] |
772mtd | What's the difference between a 32 bit operating system and a 64 bit? | Technology | explainlikeimfive | {
"a_id": [
"doindof"
],
"text": [
"The difference is 32 bits... bah-da-boom.. Seriously, you are limited to 4G of RAM with only 32 bit OS (address limit 'cause you only have 32 bits to use). This also translates into how much info you can pass through the computer - like drinking a slurpy through a narro... | [
"url"
] | [
"url"
] | |
773gfx | Why can't computers use storage devices as RAM? | Technology | explainlikeimfive | {
"a_id": [
"doirbax"
],
"text": [
"They can and do, it's called a swap space(unix)/paging file(windows). It can't be the main RAM source though due to speed limitations."
],
"score": [
3
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
775e0h | How do programs that are not for commercial use detect that they are in fact being used for commercial purposes? | Technology | explainlikeimfive | {
"a_id": [
"doj5qbx",
"doj69wd",
"doj7yjy"
],
"text": [
"Generally they don't, in most cases it's a legal rather than technical restriction. If you violate the restriction, you would lose your legal access to the program and possibly (depending on where the restriction comes from, the laws of the... | [
"url"
] | [
"url"
] | |
776kvr | Why can't we remove salt from seawater to solve water shortages? | Technology | explainlikeimfive | {
"a_id": [
"dojdft1",
"dojdgix",
"dojdgk6",
"dojdkg6"
],
"text": [
"we can, its called desalinization. huge pumps force water at super high pressures through special filters. Its very energy intensive though, and the plant is expensive to build, so typically, whenever there is a drought, it c... | [
"url"
] | [
"url"
] | |
776v4d | How does clearing browser cache fix a lot of website issues? | Technology | explainlikeimfive | {
"a_id": [
"dojhexd"
],
"text": [
"In the case of a web browser, sometimes temp files and cookies are not current, or even become corrupted. Either way, if changes were made in the browser when trying to load, if the browser is attempting to use what is cached and it is conflicting with what the website ... | [
"url"
] | [
"url"
] | |
777pyd | how does the Nintendo gun from Duck Hunt work? | Technology | explainlikeimfive | {
"a_id": [
"dojni94",
"dojn28d",
"dojpwne"
],
"text": [
"Think of the gun as a camera that is zoomed in all the way, and when you pull the trigger it turns the screen black for an instant, except for targets which are replaced with bright blocks, and then it takes the picture. If it captures ligh... | [
"url"
] | [
"url"
] | |
777vni | what’s the fundamental difference between a CPU and A NPU? | Technology | explainlikeimfive | {
"a_id": [
"dojrkrm"
],
"text": [
"Software developer here, A CPU has a fixed set of operations it can perform - there's physical circuitry for adding integers, for multiplying integers, for loading and storing, for shifting binary bits, etc. Each operation is enumerated, and a sequence of these enumerat... | [
"url"
] | [
"url"
] | |
778416 | Why does turning on airplane mode and turning it back off help your phone reestablish a connection in an otherwise bad area for cell reception? | Technology | explainlikeimfive | {
"a_id": [
"dojq7xm"
],
"text": [
"Phones establish linkages to specific cell towers and there's a cell tower 'handoff' when you move from one cell to another. What usually happens in this circumstance is that the handoff wasn't completed or was done improperly due to the bad reception, so your phone is ... | [
"url"
] | [
"url"
] | |
779em0 | Why do police/fire radios sound so staticky? How do these departments that rely on radio communications understand each other? | Technology | explainlikeimfive | {
"a_id": [
"dok557i",
"doklkxe"
],
"text": [
"Cop here: The main reason is that we develop \"radio ear\". Basically we get used to the static, codes, shorthand, etc. It takes awhile and is something that Rookies have to overcome. In the academy we were encouraged to listen to the radio as much as pos... | [
"url"
] | [
"url"
] | |
77btix | It seems like people are much more familiar with bytes rather than bits because we use them for data storage. Is there a push to use bytes to classify network speeds (i.e. 1MBps instead of 8Mbps), as opposed to bits? | Technology | explainlikeimfive | {
"a_id": [
"doktw5i",
"dokoak9",
"dokqti6",
"dokoj6z"
],
"text": [
"Your network cable doesn't know what a byte is. It doesn't care whether you are sending 8 bits at a time, or 8000, there is no inherent notion of a byte. Ethernet, for example, operates on octets, three bits at a time, so thi... | [
"url"
] | [
"url"
] |
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