q_id stringlengths 6 6 | title stringlengths 4 294 | selftext stringlengths 0 2.48k | category stringclasses 1
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|---|---|---|---|---|---|---|---|
i9xbn2 | why bathroom scales give an initial reading that is about 1.5kg higher than second and subsequent readings? | This has happened to me consistently with 2 completely different brands of bathroom scales. I store the scales vertically when not in use. | Technology | explainlikeimfive | {
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"Are you zeroing the scale every time first? Whenever you set it on the ground after storing it vertically, you're supposed to step on it for just one second until it wakes up, then step off and wait for it to show zero. Then step on and you should get a consistent, accu... | [
"url"
] | [
"url"
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i9xzyf | Why do some appliances/devices require 6 AA batteries instead of 2 C batteries? | Or whatever the equivalent would be. I'm not a battery guy obviously. | Technology | explainlikeimfive | {
"a_id": [
"g1i8uem"
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"text": [
"AA, AAA, C, and D batteries all have the same voltage (1.5 V) but have different amounts of total charge and different maximum current. If you use 6 AA batteries in series you can get 9 volts but with more charge than a single 9V battery. With 6 AA batteries in parallel... | [
"url"
] | [
"url"
] |
i9zmz0 | How would you explain Cloud computing to someone who has no knowledge about it? | I'm trying to explain to my grandparents but it's really tough because they can't seem to understand the complex terms. Any advice on how to break down Cloud in layman terms using an analogy? | Technology | explainlikeimfive | {
"a_id": [
"g1ijcge"
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"text": [
"The Cloud simply means: someone else’s computer. You are just connecting to someone else’s computer to do whatever you were going to do."
],
"score": [
35
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ia13se | Why Factorio doesn't burn everyone's cpu? | Today i Fired up factorio again and i loaded up one of my older saves. And then, i had sudden realization. I know that object collisions are very taxing and take a lot of processing power. Then i zoomed out and watched Factorio handle more than 10k objects moving and colliding with each other on my screen and my cpu wa... | Technology | explainlikeimfive | {
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"g1kaazt"
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"text": [
"The processing required for object collisions really depends on how optimized the game is. Since factorio is a 2d game and the majority of interactions are locked to conveyors, they can be extremely optimized and hardly use a... | [
"url"
] | [
"url"
] |
ia2bqs | Why do traffic cameras begin to malfunction? Could they not just be set on a standardized timer to offset the blinking malfunction indicator? | Why do traffic LIGHTS (not cameras) begin to malfunction? Could they not just be set on a standardized timer to offset the blinking malfunction indicator? 4 way stops are horrendous when considering traffic density for certain times of the day. Why would a short-term timer not work? | Technology | explainlikeimfive | {
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"g1je8jy"
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"text": [
"I think you are talking about traffic signals not traffic cameras. That blink when they malfunction making the intersection into a 4 way stop. Originally, traffic signals were just on timers. 50 seconds for each light, then move on to the next (or whatever time). But as... | [
"url"
] | [
"url"
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ia2n36 | () Why are there so many "sexbots" on Instagram? What makes them profitable? | Technology | explainlikeimfive | {
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"g1jldgs",
"g1jm02y",
"g1k2uf0"
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"text": [
"Low ongoing cost once the system for automatically creating them is set up. Difference in cost between running one and 1000 is minimal. So if you can make one, why not make 1000? Even if each one only generates the equivalent of 10 cents of... | [
"url"
] | [
"url"
] | |
ia37zl | Why are infantry still relevant in modern war despite all of the advanced weapons available to militaries? | Technology | explainlikeimfive | {
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"g1jngj4",
"g1jqzdd",
"g1jn0db"
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"text": [
"Infantry is slow and unprotected, but highly versatile and can traverse complicated terrain like cities and the inside of buildings. Infantry can detain or kill individual persons with high precision. This is important because if you want t... | [
"url"
] | [
"url"
] | |
ia46ch | Why can't we connect two computers directly using an Ethernet cable ? | Technology | explainlikeimfive | {
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"g1l0azv"
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"text": [
"You can. Obviously you can't connect to the internet that way, so it has a limited use. But for example for gaming this is still quite common. That's what people are doing at a lan party, everybody connects their pc to each other and everybody can play together, even wi... | [
"url"
] | [
"url"
] | |
ia53rt | How does frequency turn into sound? | Human ears can hear 20 - 20000hz frequency, if you were to listen one of those [frequency test videos]( URL_0 ) they go from very low pitch to very high, then how exactly do these sounds represent different instruments in songs or voices? I messed around with with EQ in DAWs and they depict that different instruments h... | Technology | explainlikeimfive | {
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"text": [
"It’s not meant to represent anything or any sound in particular, it’s bunch of different frequencies being played in sequence, it’s pure tones that you don’t really hear normally, music instruments don’t sound like that, they sound like man... | [
"url"
] | [
"url"
] |
iabnr9 | How do studios remaster productions in 4K/High Definition if they were filmed 10+ years ago? | Technology | explainlikeimfive | {
"a_id": [
"g1mhuf4"
],
"text": [
"If they were shot on actual film they can rescan the films. Film itself is a physical medium, and just like scanning a sheet of paper, you can scan it at whatever resolution your scanner will allow. Naturally it can only scan what's present, so if you're scanning an old... | [
"url"
] | [
"url"
] | |
iaclpe | why are the graphics of new games that were made from 2018-now is so bad when it's set to low? Why can't it look like a 2014 game set on ultra. | If I can play a 2014 game on ultra settings and there's this new game that came out this year. Why does it look so terrible when it's set to low? Can't they improve it to make it look like a 2014 gane set on ultra? Same graphic level. Nothing fancy | Technology | explainlikeimfive | {
"a_id": [
"g1mqxuo",
"g1mr3oa"
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"text": [
"Graphics don't improve THAT much in 4 years. You're asking quite a bit considering Moore's Law doesn't apply anymore.",
"Because textures, lighting, shaders, and the number of pixels are what mainly change when switch from ultra to low. A 2014 game ha... | [
"url"
] | [
"url"
] |
iad5qu | PC Tech Pricing | Why do new and more powerful graphics cards and proccesors cost so much more? Do they actually cost more to manufacture or is it the same materials as cheaper parts just rewired for more performance and power? Like the most powerful parts from a few years ago go down drastically in price? | Technology | explainlikeimfive | {
"a_id": [
"g1n2bbo",
"g1n7pfv"
],
"text": [
"I believe the slow price creep on high-end GPU and CPUs has to do with the expansion of the enthusiast market as well as increased manufacturing costs. When I started building PCs around 8 years ago, the best consumer GPU you could buy was the GTX 680 ($5... | [
"url"
] | [
"url"
] |
iage4a | How is it possible for a phone to be charged with a charging pad and not a cable? | Technology | explainlikeimfive | {
"a_id": [
"g1nvc1l"
],
"text": [
"Do you mean Qi wireless charging? Its a magnetic field. Magnetic fields can pass wirelessly through the case and when a magnetic field is turned on it pushes on the electrons. All you need to do is switch the magnetic field back and forth and it can induce a current. It... | [
"url"
] | [
"url"
] | |
iahdod | How come the technology used for household batteries (AAA, AA, etc.) has been the same for decades while we’ve made so much progress in other areas? | Technology | explainlikeimfive | {
"a_id": [
"g1o6vvq",
"g1ok5b4",
"g1ocj98",
"g1oee2z"
],
"text": [
"Because they work really well. The technology behind toilets is the same. Super old but gets the job done. Besides some advancements have been made. Many devices that use to require alkaline batteries use lithium ion now.",
... | [
"url"
] | [
"url"
] | |
iajwxj | How does an iphone mic pick up your voice, but not your friends voice coming out of the speaker, on facetime? | Technology | explainlikeimfive | {
"a_id": [
"g1p0kxg"
],
"text": [
"The phone knows what sound is coming out of its own speaker. It can intelligently prune that out from the microphone input."
],
"score": [
19
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iakigk | How does someone get crazy drone footage flying super high, across town, and through buildings? Isn't there range and lag issues? | [Like in this post,]( URL_0 ) they are flying all over the city and through doorways and windows without hitting anything. I can barely even get a smooth video on my phone when I'm in the same room as my WiFi router. How do they do that? | Technology | explainlikeimfive | {
"a_id": [
"g1p4zbp",
"g1pdix2"
],
"text": [
"There are sometimes lag issues and latency. But skilled pilots can handle it (to fly in a lot of public spaces you’re actually supposed to get a certification). For connection issues yea for cheaper drones. But some High end ones I know are able to handle... | [
"url"
] | [
"url"
] |
ial8h6 | Why can't a secure, hard-to-undermine online voting system be developed for elections? | Technology | explainlikeimfive | {
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"g1pa4j7",
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"text": [
"It's a matter of risk. You could make an online voting system that is harder to breach, but a single breach could lead to vast manipulation. Our current systems might be easier to breach, but the impact is smaller and more ea... | [
"url"
] | [
"url"
] | |
iao63t | How does the OS virtualize memory? | Also curious about how virtualization works in general -- stuff like virtual machines, containers, etc... Thanks! | Technology | explainlikeimfive | {
"a_id": [
"g1psrc1"
],
"text": [
"You are mentioning two different things: 1. Virtual memory - functionality built into the OS so that it can use hard drive space as working memory when RAM memory is low. This is inefficient and VERY slow, but allows processes to continue running instead of crashing alb... | [
"url"
] | [
"url"
] |
iattnj | What goes into rendering a font? | There seems to be a lot going into just displaying a font on a computer screen, e.g. Cleartype. What other things go into rendering a font? | Technology | explainlikeimfive | {
"a_id": [
"g1qubn2"
],
"text": [
"When rendering text, it first needs to be split into chunks based on left-to-right and right-to-left languages. This is to make sure that you can mix both kinds in a single paragraph, without some words appearing to be backwards. One library which can take care of this ... | [
"url"
] | [
"url"
] |
iaua3z | How do noise cancelling headphones work? | Technology | explainlikeimfive | {
"a_id": [
"g1qsl32",
"g1qtsy1"
],
"text": [
"Do you know how sound is a wave of energy? Well imagine a flat horizontal line, representing a sound wave. When it’s flat, let’s say there’s no energy so we hear silence. Now imagine a sound, and we see the sound represented as big hill-shaped bump of ene... | [
"url"
] | [
"url"
] | |
iaw4hy | Recursive and Iterative DNS lookup | I can't get the grasp of the concept! they all sound the same | Technology | explainlikeimfive | {
"a_id": [
"g1r2x85"
],
"text": [
"Recursive - the dns server you contacted will search through all the resources it has. Iterative, it looks in its own list and tells you where else you can check. Imagine if you called a school secretary and said “I am looking for Joanie Cunningham, she’s in grade 9”. I... | [
"url"
] | [
"url"
] |
iazfyj | I understand that, in computers, a '1' can be represented as a pulse. Be it light or an electric charge. But how us a '0' communicated? | How does a system differentiate between a 0 and a gap between two 1's? Like, if you have the strung '11010001' flashed onto a wall by an optical cable, how would this look if we could slow it way down and how does a receiving device interpret this? | Technology | explainlikeimfive | {
"a_id": [
"g1rnlju",
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],
"text": [
"Clock timing. You are likely familiar with GHz rating of processors. This is the speed at which it operates and modern processors can \"throttle\" up or down within a range as needed. This will all fall back to a quartz clock on the motherboard that oscil... | [
"url"
] | [
"url"
] |
ib0bz5 | Why is it faster to copy things from a USB to my computer rather than from the computer to the USB? | Making backups and I noticed this happening, wondering what the difference is | Technology | explainlikeimfive | {
"a_id": [
"g1rtpn0"
],
"text": [
"On most mediums, write speed is slower than read speed. USB sticks tend to be slower than most hard drives, so that'll be the limiting factor."
],
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4
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ib12mu | My fan has an “ion” setting, what is it actually doing and how does it create ions? | Bonus points if there’s an ELI5 for benefits for ions. | Technology | explainlikeimfive | {
"a_id": [
"g1ry6bx"
],
"text": [
"What your fan is doing is using comparatively high voltage to ionize the air around it (strip off electrons from air molecules). The fan then sends those ions into the air nearby, where, so the claim goes, the ions attach to dust particles and other contaminants. These ... | [
"url"
] | [
"url"
] |
ib1gd4 | how does data recovery work from a hardisk | Like how isn't anything deleted permanently and how do softwares recover it | Technology | explainlikeimfive | {
"a_id": [
"g1s0eyr"
],
"text": [
"When data is deleted by the OS on mechanical hard drives, the hard drive isn't instructed to go to where the data is physically stored and overwrite it, instead it just goes to what is essentially a giant table of contents and deletes the entry there. From here, that sp... | [
"url"
] | [
"url"
] |
ib28wi | Do adjacent browser tabs know about each other? | Technology | explainlikeimfive | {
"a_id": [
"g1s5pg0",
"g1s5qnd"
],
"text": [
"Short answer, no. Long answer to not get deleted. There is no information that is sent between tabs. All your communications are addressed to the destination. Caveat: if you somehow got infected with some kind of packet sniffer or something through that l... | [
"url"
] | [
"url"
] | |
ib3tdf | Why is night vision footage always green? | Technology | explainlikeimfive | {
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"g1seu5x",
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"g1so5gv",
"g1slhun",
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"text": [
"The human eye is most sensitive to differences in light wavelengths (colors) in the green band. By using green it is easiest to distinguish between the slightest variations.",
"The human eye ... | [
"url"
] | [
"url"
] | |
ib58m2 | Why is Flash Player a dying/dead program, is it just obsolete? | Technology | explainlikeimfive | {
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"g1so5vt",
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],
"text": [
"Pretty much, yeah. When Flash came out, it got popular because there was nothing like it. But Flash is not very secure, even back then. Nowadays, there are simply more, better and safer alternatives, like HTML. EDIT: It's worth noting that ... | [
"url"
] | [
"url"
] | |
ib8qzr | How do self-healing cutting mats work? | Are they like some special high viscosity plastic or something? Also, are there any microscope video of these mats healing? | Technology | explainlikeimfive | {
"a_id": [
"g1tkrvq"
],
"text": [
"From what I have read they are made of a bunch of tiny particles squished together and when you cut into it the blade goes between the particles and then back out instead of through. As if a hair brush were squished together into a solid form and the bristles were creat... | [
"url"
] | [
"url"
] |
ib9tj5 | How come the sense of sight and sound can be transmitted through technology while the other senses are not able to? | Hello! I just noticed while using my laptop that sight and sound are converted into code, transferred to the internet, then it reaches me. How come the other senses, especially smell, can't be converted into code? | Technology | explainlikeimfive | {
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"g1tqt3f"
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"text": [
"Not the expert so I’ll let some one else answer but if I’m not mistaken sounds and light(responsible for vision and colors) travel by invisible waves which we can detect replicate and broadcast, but smell are just particles t... | [
"url"
] | [
"url"
] |
ibb9fk | How can modern aircraft fly on just one engine if the other one fails? Shouldn't the torque produced by the functioning engine make the aircraft yaw? | Technology | explainlikeimfive | {
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"g1tueyn",
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"g1v34qv",
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"text": [
"Yes, the aircraft will naturally want to yaw due to the asymmetric thrust. However, this can be compensated for by the controls turning into the yaw to keep it going straight. There is a speed, called minimum c... | [
"url"
] | [
"url"
] | |
ibdmuv | Why do smartphone batteries discharge over time even if the phone is turned off? | I heard that leaving the accumulator empty for a long period of time is very bad for the capacity of the accumulator, so I charge my devices fully before turning them off. But I've noticed that when I turn them on again after one month they are almost always completely discharged. Could anyone please explain why this h... | Technology | explainlikeimfive | {
"a_id": [
"g1uyscz",
"g1upzyn",
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],
"text": [
"(Almost all) batteries will lose charge when not being used. As a rule of thumb, the higher the energy density, the quicker this happens. In the end, this is a consequence of thermodynamics. You could say it's unnatural for energy to be acc... | [
"url"
] | [
"url"
] |
ibg3oc | How an adblock block the ads? | Technology | explainlikeimfive | {
"a_id": [
"g1vb9qu",
"g1vbxk1"
],
"text": [
"All the ads come form pretty much the same handful of companies, so an adblock just needs to block access to those companies websites and that stops the ads from downloading, a blank box for the ads still remains, but since the code of the box is pretty r... | [
"url"
] | [
"url"
] | |
ibk3yr | How do computers calculate pi to a million digits if floating point numbers are limited to about 6 digits? | Technology | explainlikeimfive | {
"a_id": [
"g1w5mkd"
],
"text": [
"How many digits you get in a standard floating point number varies with the computer hardware, programming language, and some other things, so it can be bigger, but you're right that no current system natively supports floating point numbers with millions of digits. The... | [
"url"
] | [
"url"
] | |
ibk90t | How is my ISP able to "clear blocks" or magically pump more internet into my modem when I'm on the phone with tech support. What can/are they doing on the other side of the phone? | After having issues with internet outages and super slow speeds, my ISP tech support is able to do something that makes speed checks seem moderately acceptable, albeit temporary. | Technology | explainlikeimfive | {
"a_id": [
"g1w7246",
"g1w6hkh"
],
"text": [
"1). Never, ever use the speed test site that is run by your cable company. It will lie to you. 2). They probably just reset your modem. Shitty modems with shitty firmware run fine right after a reboot but eventually have issues with memory leaks and what ... | [
"url"
] | [
"url"
] |
ibl2n8 | How does internet data travel so quickly internationally? e.g. Discord, Skype, instant messaging | Technology | explainlikeimfive | {
"a_id": [
"g1wd0m9"
],
"text": [
"When you access a site overseas, you are almost certainly routing some of your traffic through the giant underwater fiber optic cables that connect the Internet between the oceans. For a significant portion of the journey of your data, it travels at the speed of light. ... | [
"url"
] | [
"url"
] | |
ibmqis | How can mail in voting be secure when the mail can be intercepted and possibly destroyed? (I am all for mail in voting, I just don’t understand how it is secure) | Technology | explainlikeimfive | {
"a_id": [
"g1wsatp",
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"g1x993k"
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"text": [
"That is just as secure as paper ballets, which get handled by volunteers/lower rung staffers. Those can also easily get lost or destroyed, but we have trusted those for a long time. The argument isn’t that Mail In ball outs a... | [
"url"
] | [
"url"
] | |
ibt08s | When you take a picture of a digital screen with a mobile device, and then slowly zoom in and out on the picture, why do the “scan lines” distort in crazy patterns? | Sorry I can’t post a video of this effect - my phone doesn’t have screen recording capabilities. Hopefully enough people have noticed this that someone can answer. Edit: [here’s the best video]( URL_0 ) I can get. It should show what I’m talking about pretty clearly | Technology | explainlikeimfive | {
"a_id": [
"g1y4fn7",
"g1yaqrt"
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"text": [
"That's called moire named from a fabric that has similar patterns woven into the material. It's an optical effect that arises when two sets of lines or grids move across one another. In this case, the grids are the screen's pixels and your phone camera's ... | [
"url"
] | [
"url"
] |
ibu7fr | Why do almost all consumer PCs aside from Macs come preloaded with Windows? | What made Windows the default and become ubiquitous and why didn’t more companies use their own OS/a different OS? How did Windows become essentially a monopoly on computers? It’s on everything from Dell to Acer to Lenovo, why did these companies choose to put Windows on their machines? | Technology | explainlikeimfive | {
"a_id": [
"g1y8k2i",
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"text": [
"A long time ago they were all sorts of different operating systems that were tied to specific hardware. You could get a Commodore, an Atari, a Tandy, or an Apple. IBM suddenly decided to get in on the game too. But instead of creating every... | [
"url"
] | [
"url"
] |
ibwamb | How does an electric meter know how much electricity is being consumed? | My understanding is that when you plug something in and turn it on, it completes a circuit, and let's say if it's a 600W appliance in the US, you'd get 120V 5A flowing through the hot wire into the appliance and then the same 120V 5A will flow back through the neutral wire, through the circuit breaker and back to the g... | Technology | explainlikeimfive | {
"a_id": [
"g1ykld2"
],
"text": [
"> you have the same amount of power flowing in and out of the appliance. You have the same amount of water flowing from the bottom of a hydroelectric dam, but is the energy state of that water the same as at the top? What flows back on the neutral is 5A - at close (but ... | [
"url"
] | [
"url"
] |
iby5iv | Where does unused electricity "go"? | Let's say I have a 100W solar panel outputting 5A at 18V DC under ideal conditions. If I connect a 18W load to it, I draw 1A. What happens to the other 4A? Or if I don't connect anything to it, where does the 5A go? I know that nothing flows through wires unless a circuit is completed so the electricity isn't stuck in ... | Technology | explainlikeimfive | {
"a_id": [
"g1yv3et",
"g1ytw79",
"g1ytv3u"
],
"text": [
"Amps are the equivalent of work that a circuit is capable of doing. It's doesn't necessarily do that work all the time. Your example system produces up to 5 amps. Think of it as Joe can having the ability to do up to 50 push-ups. If Joe onl... | [
"url"
] | [
"url"
] |
ic5cgj | What makes copying files slower or faster? | When copying or moving files (in Windows for this example) it shows you the speed at which the transfer is currently happening. However this is very rarely a constant rate and can vary wildly from second to second. What factors are involved in affecting this speed? | Technology | explainlikeimfive | {
"a_id": [
"g20ar3k"
],
"text": [
"How your computer is being taxed by running other programs. Your computer can only handle so many tasks at once, so when you have multiple programs running it sometimes has to juggle all those tasks, causing slow downs in your copying. It also has to do with file size, ... | [
"url"
] | [
"url"
] |
ic79qy | Why does Terminal show a "%" sign now instead of a "$" sign? | Technology | explainlikeimfive | {
"a_id": [
"g20ozoh",
"g22eu3t"
],
"text": [
"If you’re talking on MacOS, the default shell was changed from bash to zsh. The default prompt for zsh is %. Bash is $.",
"That symbol is simply an indicator that your terminal is ready to accept a new command from you. Which symbol it is in general d... | [
"url"
] | [
"url"
] | |
icatam | What does ejecting a flash drive or SD card from a computer do, and what happens if you don't? | Technology | explainlikeimfive | {
"a_id": [
"g21cxy8",
"g21d9ey"
],
"text": [
"Ejecting unmounts the drive from the file system. It ensures that no program is writing/reading data on the drive, so when you remove it no program will have issues and no files on the drive will be half-written. If you remove it without ejecting odds are... | [
"url"
] | [
"url"
] | |
icg48z | Why are AMD processors not, or less, vulnerable to Meltdown and Spectre? | All the answers at [this Stack Exchange post]( URL_0 ) are too abstruse and complex. Can someone please ELI5 by relying on, but variating, u/zoox101's [excellent analogy]( URL_1 )? | Technology | explainlikeimfive | {
"a_id": [
"g22k5ry"
],
"text": [
"AMD CPUs were just as vulnerable to Spectre as Intel CPUs were. AMD's initial denial was an attempt at damage control by their PR department. Once their legal department realized what the PR department said they retracted their claim. Meltdown is a specific vulnerabilit... | [
"url"
] | [
"url"
] |
icjh4t | How is computer code written onto Rom chips? (Like those used in old school video games.) | Back in the 8bit and 16bit era of video games, all the systems used came cartridges that consisted of rom chips. I kind of understand magnetic storage and optical storage, but I don’t understand how rom chips store code. Is the code written first and then the chips manufactured specifically for the code? | Technology | explainlikeimfive | {
"a_id": [
"g230hua"
],
"text": [
"It depends on the type of ROM chip. Modern ROMs are often [EEPROM]( URL_1 ), which can be erased and programmed electronically using an [EEPROM programmer]( URL_2 ), or [EPROM]( URL_3 ) which are erased by exposure to light. In the 8/16 bit era, most console cartridges ... | [
"url"
] | [
"url"
] |
icjrf8 | Mentall Ilness early stages or am I being watched? | Technology | explainlikeimfive | {
"a_id": [
"g22z7q9",
"g22z96m"
],
"text": [
"That is not how cameras work. They don’t have speakers. If they were hidden, why would they draw your attention with sound. Please, go get help. Even going to the hidden camera explanation is a sign. It’s okay, the brain is just another organ. If it messe... | [
"url"
] | [
"url"
] | |
icjvec | the thought process behind adding "last seen" to apps. Isn't it only really useful for crazy partners? | Technology | explainlikeimfive | {
"a_id": [
"g23041i",
"g236ylj"
],
"text": [
"True, but also to see if the user is still active on the app or not. and if they are active, when was it last time they were.. It is useful for a lot of scenarios, crazy partners will find their way eitherways",
"It's kinda useful to determine if an a... | [
"url"
] | [
"url"
] | |
icklrm | what does vram do and what happens when you increase it? | Technology | explainlikeimfive | {
"a_id": [
"g233qd6"
],
"text": [
"VRAM (RAM of your graphics card) mostly stores textures and various internal calculation stages. If you have more VRAM than the game (or the other task) needs, nothing will happen. If you have less, various issues may occur: say, if the graphics card is unable to store ... | [
"url"
] | [
"url"
] | |
icl67i | How do 3D glasses work? | Also, are there different methods so that they can work on all types of screens? | Technology | explainlikeimfive | {
"a_id": [
"g236i11"
],
"text": [
"It all depends on the general perspective you see an object. While seeing an object the right side of your eye sees the object in one angle and the left side with some different angle to see the same image, if in case you want it in the practical terms just close one of... | [
"url"
] | [
"url"
] |
icmm3y | why do electronics that are slightly malfunctioning work after we hit them? (E.g. remote controls, mice etc.) | Technology | explainlikeimfive | {
"a_id": [
"g23em43"
],
"text": [
"Usually it's some electric contact gone slightly loose, a piece of dust stuck between the contacting parts and other minor issues like that. When we hit the device, it shakes and things can get back to normal."
],
"score": [
7
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
icn8xm | How does a rectifier change AC to DC (and vice versa)? | I'm a guitarist with an interest in how my tube amps work. Some amps have solid state (SS) rectification, and some have tube rectification. Either way, I understand SS and tube rectification effectively does the same thing. My question is how it's able to do it at all. Thanks in advance! | Technology | explainlikeimfive | {
"a_id": [
"g23klvl",
"g23kn0z"
],
"text": [
"It starts with diodes Diodes only let current flow in one direction. AC flows in both directions and looks like a sine wave when you graph it out, where half the wave is above 0 volts, the other half is below. A half rectifier, really just a diode, will b... | [
"url"
] | [
"url"
] |
icrhe4 | what are machine learning algorithms ? Such as keras, tensorflow etc. ? Are they software ? Or some codes ? | Technology | explainlikeimfive | {
"a_id": [
"g24disf"
],
"text": [
"An algorithm is a series of steps to perform some calculation. Those can be written in words, eg: \"to find the arithmetic mean of a series of numbers, add them all together and divide by the amount of numbers\". If you want a computer to perform that, you need to write... | [
"url"
] | [
"url"
] | |
ics0ep | Why did old game cartridges need batteries to keep data? | As far as I know, modern hard drives, SSDs, and optical medias don’t need power to keep data on them. Why did old cartridges need to? In addition, if the cartridge lost power, why was only player progress lost? If data was lost, wouldn’t the whole cartridge be lost? Why was only the player progress lost, and not the ac... | Technology | explainlikeimfive | {
"a_id": [
"g24fee1",
"g24feq1"
],
"text": [
"The battery wasn't required to store the ROM data (ie the game itself), it was only needed to store player data. The manner in which these two things were stored was different, because the game data was written once, in a factory, where as the player data... | [
"url"
] | [
"url"
] |
ict3zo | What makes reproduction video game cartridges so bad? | Technology | explainlikeimfive | {
"a_id": [
"g24p4ak"
],
"text": [
"People who collect vintage games (like myself) want authentic products. If you just want to play the game, you can usually do so through other means- emulation, virtual console, everdrive, etc. The point of collecting physical copies is to have authentic versions. No mu... | [
"url"
] | [
"url"
] | |
icu5ly | How are 24 different satellites keeping track of around 4.5 billion people's technology? (That number being the ammount of the world that has access to the internet). | Technology | explainlikeimfive | {
"a_id": [
"g24su0g"
],
"text": [
"They're not. What 24 satellites are you talking about? GPS? That's a one-way technology. The satellites broadcast information but don't receive anything from the devices using the signals."
],
"score": [
16
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
icuxcc | Why programs just sometimes don't open | Technology | explainlikeimfive | {
"a_id": [
"g24yv86"
],
"text": [
"Think of your computer's hardware like a city highway system, there's data in the form of electricity (cars) going every which way. The routes are the same but the cars will be in different places on the road, parking lots will be full or empty,etc...etc...etc... This i... | [
"url"
] | [
"url"
] | |
icv1ov | Why is technology rapidly advanced in the past century? Why didn’t it happen before 1900? | Technology | explainlikeimfive | {
"a_id": [
"g250446",
"g250zym"
],
"text": [
"It did, honestly. The industrial revolution was a major major change. We may think that all the gadgets we have now are significant, but the massive change from agricultural to industrial-vmbased economies impacted EVERYTHING",
"There are countless ot... | [
"url"
] | [
"url"
] | |
icvpos | How barcodes work? | Please as simply as possible 🙏 | Technology | explainlikeimfive | {
"a_id": [
"g254nsr",
"g254cv5"
],
"text": [
"To add to the previous answer - the scanner reads each line as either a one or a zero and then this results in a unique number attached to the product being scanned. UPC codes were one of IBMs big inventions!",
"It reads them and each stripe represent... | [
"url"
] | [
"url"
] |
icxjob | When a plane takes off and the nose lifts up why does the tail not hit the ground? | 27 years old and flied on numerous planes and this has always bothered me. Even had it explained by family before and I still don't get it. I.e. If I lift my hand up my fingers go in the air but my palm would hit the table... Why do the tails of planes not hit the ground?!? | Technology | explainlikeimfive | {
"a_id": [
"g25ex74",
"g25fzsc"
],
"text": [
"They don't hit the ground because the pilots are not pulling all the way up. If they did then it'd hit the ground. Pilots usually go through hours and hours of training. When it does happen, it's called a tailstrike. URL_0 URL_1",
"The back of the pla... | [
"url"
] | [
"url"
] |
icxryl | How did "cheat" cartridges like Game Genie work and find cheats and hidden options in games? | Technology | explainlikeimfive | {
"a_id": [
"g25htyr"
],
"text": [
"Such cheat cartridges modified parameters in memory. The modern equivalent of this would be like Cheatengine for PC. As an example, let's say you're playing a beat 'em up and want infinite lives. While you're playing the game, the game needs to know how many lives you c... | [
"url"
] | [
"url"
] | |
icychw | How come phones often shutdown before the phone battery is truly dead? | Technology | explainlikeimfive | {
"a_id": [
"g25k0m6"
],
"text": [
"It's bad for the battery to be truly dead. Some lithium chemistries can't be recharged at all from that state. The phone software is trying to prevent that sort of \"bricked\" state, by shutting off to conserve charge. Just charge your phone, and you won't have the prob... | [
"url"
] | [
"url"
] | |
id3tzy | How secure are these password management programs really? | Technology | explainlikeimfive | {
"a_id": [
"g26m94a",
"g26p1n1",
"g26m3bg",
"g26n0mh"
],
"text": [
"With respect to security, a password manager is akin to a safe. Given enough time, someone could break into it and access all your passwords much in the same way someone could theoretically crack your safe and steal the deed ... | [
"url"
] | [
"url"
] | |
id61ev | what’s the difference between and Intel 5,7 and 9 processor? What do those numbers actually mean | Technology | explainlikeimfive | {
"a_id": [
"g26z5b6",
"g26zja3",
"g27m8q2"
],
"text": [
"The numbers themselves don't mean anything. It's just marketing, really. Depending on what task you are trying to perform, ones with lower numbers can out-perform ones with higher numbers, but usually it's the other way around. & #x200B; Th... | [
"url"
] | [
"url"
] | |
id7p14 | Pay to play games | Technology | explainlikeimfive | {
"a_id": [
"g2775uh"
],
"text": [
"Either plain lies or a pyramid scheme where you need to invite friends in the game and get a bit of a reward when they start spending money on microtransactions."
],
"score": [
5
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
ida3nh | What is a kernel? | Technology | explainlikeimfive | {
"a_id": [
"g27m2gw",
"g27lk4z",
"g27wnhl"
],
"text": [
"The kernel is the core of your operating system. What is an operating system you asked? Well it is a program designed to create an abstraction of your computer, for other programs to use. Basically computers are made from various part, with... | [
"url"
] | [
"url"
] | |
idbmk3 | Why are phone screen still made in breakable glass? | I broke mine yesterday and it occured to me that phone could be made of plexiglass or unbreakable glass or any other material than the weak material currently in use. Why is that? | Technology | explainlikeimfive | {
"a_id": [
"g27vbae",
"g27w0ot",
"g27ux0u",
"g27y6vw",
"g27xnsy",
"g283qoj",
"g27vjqr",
"g27w1wd"
],
"text": [
"Plexiglass isn't a glass, it's plastic: it scratches really easily. And there is no \"unbreakable glass\" so I'm not really sure what you're referring to. If you mea... | [
"url"
] | [
"url"
] |
idcc40 | Why do all media buttons look the same | Technology | explainlikeimfive | {
"a_id": [
"g280d70"
],
"text": [
"They are all based on the standard controls from the old magnetic tape players. Triangle indicated that the tape would move in that direction at normal speed: Play Double triangle would indicate the tape would move in that direction at double speed: Fast Forward Double ... | [
"url"
] | [
"url"
] | |
idcgei | how do people build those oil rigs on deep seas/ocean and how do they know that there is oil there? | Technology | explainlikeimfive | {
"a_id": [
"g28242z",
"g281g20",
"g282br4"
],
"text": [
"I’m not sure about the engineering and construction of offshore oil rigs, so I’ll answer the other part of your question. How oil and gas is searched for and found is known as the exploration side of the industry, and is the most costly asp... | [
"url"
] | [
"url"
] | |
ide0q2 | Why do video games make you press a button after loading before you can see the main menu? | Technology | explainlikeimfive | {
"a_id": [
"g28cpn6",
"g28gsuc",
"g28ma71"
],
"text": [
"It might just be a long standing convention that many developers continue without giving it much thought. Back in the days of arcade games, the title screen would have the prompt to insert coin(s), which would typically change to Press Star... | [
"url"
] | [
"url"
] | |
ide5ly | How are voltages synced up between chargers and devices? | For instance, when charging a phone with a 5V USB, you have the charger pushing 5V 2.4A into the phone's battery, but the battery is at anywhere between 3.7V and 4.2V depending on state of charge. So does the device tell the charger that it needs say 3.9V and then the charger gives it that, or does the charger push 5V ... | Technology | explainlikeimfive | {
"a_id": [
"g28dgqg"
],
"text": [
"There is a charge controller chip in the phone that takes a 5V constant voltage feed. It then imposes a voltage and current limit of it to feed it into the battery. For most of the charge cycle the battery charge is current limited to 1-2A (this inherently implies that ... | [
"url"
] | [
"url"
] |
idekgs | how an electric car is ecologically and ethically better when the electricity is produced by gaz, fioul, etc? | Technology | explainlikeimfive | {
"a_id": [
"g28eo4p",
"g28eprg",
"g28exra"
],
"text": [
"Even if an electric car is charged by a fossil fuel grid, it’s net emissions per mile driven is still much less than the emissions of a gasoline engine. It’s not perfect, and there are still a lot of issues with electric cars (like mining t... | [
"url"
] | [
"url"
] | |
idfm3w | Why are people hating on Apple for removing Fortnite? | Technology | explainlikeimfive | {
"a_id": [
"g28n7zi",
"g28ljna"
],
"text": [
"People hate on Apple because Fortnite is a popular game and now people can't play it on their Iphone. Apple is free to do whatever they want with their apps store, the problem is that you can't install an apps on an Apple product unless it's by the apps s... | [
"url"
] | [
"url"
] | |
idi9ld | Why is the game Go so difficult for computers to master? | Technology | explainlikeimfive | {
"a_id": [
"g296d20",
"g2962zu",
"g2971ux"
],
"text": [
"Several, but two are the most commonly brought up. Imagine playing chess. When evaluating a move, you usually follow this pattern: you want to move one piece, so you try to figure what the best move your opponent can do after yours, then ma... | [
"url"
] | [
"url"
] | |
idl7fp | why we have over the counter painkillers but not OTC antidepressants or anti-anxiety meds? | Technology | explainlikeimfive | {
"a_id": [
"g29pwh1",
"g29rlg5",
"g29poh2",
"g2a2cy0"
],
"text": [
"OTC painkillers are pretty simple and hard to mess up. Their effects are very well-documented and consistent, and they have a relatively short half-life in the body. Wait a few hours and it'll all be gone, even if you have so... | [
"url"
] | [
"url"
] | |
idmjzd | - Why sites need to know that you're not a robot? What is the point with captchas? | And why some are fine with just a click and others require you to "defuse a bomb" puzzle? | Technology | explainlikeimfive | {
"a_id": [
"g29zfhu",
"g2adncx",
"g2aotwt"
],
"text": [
"Programmer here. The issue is that there exists things called \"browser automation tools\" such as Selenium. These allow a programmer, like me, to program in a set of rules that tell the browser how to behave. You can do all kinds of things... | [
"url"
] | [
"url"
] |
idr0nj | How does the pump at the gas station know when to stop putting fuel in your car? | Technology | explainlikeimfive | {
"a_id": [
"g2at72w",
"g2bl8sq",
"g2bn23u",
"g2ayotn"
],
"text": [
"Up inside the handle there's a venturi nozzle (a smooth restriction in the tube) that causes a low pressure spot in the fuel line. That venturi is connected by a small tube to a hole near the end of the nozzle. The hole is on... | [
"url"
] | [
"url"
] | |
idrnfw | How the quickly flashing green light on the back of a Fitbit/smart watch works to check your heart rate? | Technology | explainlikeimfive | {
"a_id": [
"g2avsj7",
"g2ax6sj",
"g2bo0wz"
],
"text": [
"> Photoplethysmography. It’s essentially testing how much red or green light it can see when looking at the skin on your wrist. Blood is red because it reflects red light and absorbs green light, so when your heart beats, there’s more blood... | [
"url"
] | [
"url"
] | |
idsoqx | How do contactless cards work? | Technology | explainlikeimfive | {
"a_id": [
"g2b1i3h"
],
"text": [
"The card reader emits a magnetic field via coil. The card has a tiny chip with a memory embedded in the plastic. The chip is connected to another coil embedded in the card. If the reader detects the magnetic response of the card's coil in its near field, it starts alter... | [
"url"
] | [
"url"
] | |
idvfrj | When talking about 3g,4g, 5g etc and internet getting faster, how does it actually get faster? | Technology | explainlikeimfive | {
"a_id": [
"g2bgwkz"
],
"text": [
"It's different modulation techniques. How much data you can transfer greatly depends on how you encode it on the electromagnetic wave you're transmitting. 5G and LTE for example use Orthogonal Frequency-Division Multiplexing (OFDM). This basically means we are transmitt... | [
"url"
] | [
"url"
] | |
idwlx0 | What are bitcoins? | Technology | explainlikeimfive | {
"a_id": [
"g2bmxfq"
],
"text": [
"Bitcoin is a new currency that was created in 2009 by an unknown person using the alias Satoshi Nakamoto. Transactions are made with no middle men – meaning, no banks! Bitcoin can be used to book hotels on Expedia, shop for furniture on Overstock and buy Xbox games. [Le... | [
"url"
] | [
"url"
] | |
idxpg1 | How can an oven that has a turbo mode cook food in half the time but at the same temperature? | Technology | explainlikeimfive | {
"a_id": [
"g2bua50"
],
"text": [
"A common way to speed up the cooking is to blow the hot air at the food so it heats up the same way wind feels colder. The air directly touching the food can cool down and if it’s not moved it can somewhat insulate it from cooking more."
],
"score": [
4
],
"... | [
"url"
] | [
"url"
] | |
idy7hg | how can we generate purely random numbers? Is there a way? | Technology | explainlikeimfive | {
"a_id": [
"g2bxftw"
],
"text": [
"Quantum mechanical events (such as how long it takes an individual radioactive atom to decay) are entirely random, and by measuring them, we can generate truly random numbers. Non-random but highly complex systems can also generate \"random enough\" numbers, such as \"t... | [
"url"
] | [
"url"
] | |
idyybo | Why can't Wi-Fi be transmitted the same why mobile service is, via a tower or satellite to make it widely available? | Technology | explainlikeimfive | {
"a_id": [
"g2c3eao",
"g2c353s",
"g2cepnm",
"g2cc7y6"
],
"text": [
"Wi-fi isn't good at penetrating things like walls and is pretty much line of sight, compared to cellular frequencies. Coverage comparable to the cellular network would require a lot of antennas.",
"Wifi is microwaves. If ... | [
"url"
] | [
"url"
] | |
ie56kq | Why is the glass panel of a PC case always on the left side of the case? | So I've been looking at getting a new PC case, typically I have my PC setup to my left. It seems that most PC cases are oriented to be placed on the "right" side of a desk or at least on the "right" side of the user. This isn't a huge issue, but I was wondering, is there a specific reason for this? & #x200B; Thank you ... | Technology | explainlikeimfive | {
"a_id": [
"g2d7hv6"
],
"text": [
"Motherboard positioning mainly. The ATX motherboard standard and it's related standards (nearly universal outside of some odd OEM prebuilts) has its I/O panel and expansion ports on the left side of the board, and it's uncommon (for reasons I am not fully aware of) to m... | [
"url"
] | [
"url"
] |
ie65tq | How does face recognition on smartphones and other devices work? How does the program differentiate between a picture of you and your real face when unlocking it? | Technology | explainlikeimfive | {
"a_id": [
"g2dlfij"
],
"text": [
"It differentiates between the 2 because face recognition software takes a 3D scan of your face where a picture is only 2D. This prevents the most obvious way of circumventing the technology."
],
"score": [
5
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
ie72ik | If our brains are somewhat analogous to computers, can computers become confused or mess up in math and other tasks like we do? | Technology | explainlikeimfive | {
"a_id": [
"g2dkpml"
],
"text": [
"Computers can occasionally mess up math due to things like supply voltage fluctuations or cosmic radiation particles hitting the wrong thing (this is why ECC -Error Correcting Code- RAM sticks exist: to recover the rare errors introduced into critical servers' memory by... | [
"url"
] | [
"url"
] | |
ieeuoi | Can Face ID differentiates between identical twins? | Technology | explainlikeimfive | {
"a_id": [
"g2frc2z"
],
"text": [
"People have done tests, and no, it still unlocks with identical twins, it cannot differentiate, however this isn’t true for Touch ID"
],
"score": [
6
],
"text_urls": [
[]
]
} | [
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] | [
"url"
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ieexv7 | Why do we have to point tv remotes towards the tv to get it to register, but not Xbox remotes? | Technology | explainlikeimfive | {
"a_id": [
"g2fpw7q"
],
"text": [
"TV remotes use a laser beam, and Xbox uses a radio antennae. Little less ELI5: TV remotes use infrared (IR), which is a kind of light that is not visible to the human eye. It acts kind of like a flashlight, but with different colors we can't see. When you push a button ... | [
"url"
] | [
"url"
] | |
ieit0s | when I’m installing programs on a computer what does the “setup wizard” or “installation wizard” actually do? | Technology | explainlikeimfive | {
"a_id": [
"g2gwe1j"
],
"text": [
"before the wizards you had to manually type in all the information. what do you want to do where is the file located now you have to find or mount the cd and the hard drive. and tell the pc where it is. then tell the pc where you will put it. then you have to find the e... | [
"url"
] | [
"url"
] | |
iej29p | Why haven't we managed to develop an easily-quantifiable unit for 'how much energy something has left' in rechargeable devices? For example "oh man, that phone call just cost me 5 Whatevers of phone battery" | Technology | explainlikeimfive | {
"a_id": [
"g2gxmjg",
"g2gznkr"
],
"text": [
"That does exist. We just don’t talk in amps and Volts unless you are an electrician, mechanic, scientist or electrical engineer.",
"Don’t you just use “percent”? “Can you pass me the charger? I’m on 12 percent”"
],
"score": [
16,
10
],
... | [
"url"
] | [
"url"
] | |
iejj2x | Why do wireless peripherals come with their own bluetooth dongle? Why can't my PC use one dongle to connect to multiple devices? | Technology | explainlikeimfive | {
"a_id": [
"g2h3hzz"
],
"text": [
"The dongles don’t USE Bluetooth, or they wouldn’t need the dongle. It, as far as I am aware, is a radio wireless receiver that also serves to decode the signal transmitted from the mouse. As to why each mouse needs their own, one may use slightly different frequencies o... | [
"url"
] | [
"url"
] | |
iekei3 | How do pulse oximeters guess the oxygen level in your blood? | Technology | explainlikeimfive | {
"a_id": [
"g2hfo3b",
"g2i7pet",
"g2hfxjp",
"g2hgq09"
],
"text": [
"It doesn't guess it, it's directly measured via light absorption. Oxygenated hemoglobin (HbO2) absorbs different wavelengths of light in different intensities than the non-oxygenated form (Hb). By using 2 LEDs with different ... | [
"url"
] | [
"url"
] | |
iepgm4 | Why cant we just have drones with infrared cameras alert california fire authorities the second brush fires start? | Technology | explainlikeimfive | {
"a_id": [
"g2ij2wm",
"g2ip1r3",
"g2iio9b",
"g2iiljk",
"g2iofhy",
"g2ijt6x"
],
"text": [
"I'm not sure you understand just how much forest and brush there is. Like, through the Sierras, there's a lot of places where you could walk in a straight line for a couple days, and not encounte... | [
"url"
] | [
"url"
] | |
ieq6g1 | How did bridge builders of old ensure both ends of the bridge would perfect meet in the middle before laser measuring was around? | Technology | explainlikeimfive | {
"a_id": [
"g2iogzr",
"g2j4599"
],
"text": [
"Guide poles and ropes. You set up either poles or ropes on either side of the space you want your bridge that stretch the distance you need to cover, and then you start building between the poles/ropes. You can remove the poles/ropes after completion, but... | [
"url"
] | [
"url"
] | |
ieqcb4 | How does your charger charge your phone battery? | Technology | explainlikeimfive | {
"a_id": [
"g2ir873"
],
"text": [
"Batteries use chemical reactions to create a voltage and pushes the current in a certain direction. For rechargeable batteries, the chemical reaction can be reversed. By plugging into a wall, an outside voltage is pushing the current in the opposite direction and forcin... | [
"url"
] | [
"url"
] | |
ieqfjr | How can different radio frequencies (HZ) broadcast the entire spectrum of audible sound frequencies (HZ) simultaneously? | Technology | explainlikeimfive | {
"a_id": [
"g2iq9b7",
"g2iqlyu"
],
"text": [
"Basically, because radio frequencies are much much higher than sound frequencies. If it’s digital radio, like cell phone signals, it’s basically transmitting instructions in binary that tell the receiver “now generate a 44kHz tone”. If it’s analog, like A... | [
"url"
] | [
"url"
] | |
ierffj | How does Windows Defender differentiate a virus from "safe" files? | I ask this because sometimes viruses can be "xyz.js" (javascript) files and it made me wonder, how Windows Defender scans and determines "This, this file right here is gonna mess things up". | Technology | explainlikeimfive | {
"a_id": [
"g2lam4c"
],
"text": [
"Antivirus software primarily compares files on your PC to known viruses. So if xyz.js looks an awful like the stuff used in abc virus, Defender will flag it as dangerous."
],
"score": [
3
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] |
iet055 | How does an automatic transmission shift gears? And what makes the gears shift back "down" once the speed decreases past certain points? | Technology | explainlikeimfive | {
"a_id": [
"g2ja4xh"
],
"text": [
"Vacuum pressure Most semi automated things in older automobiles were done using the manifold vacuum pressure as an indicator of engine load. Modern ones are going to use a computer that watches the pressure and engine speed, but the principles remain the same. Air comes... | [
"url"
] | [
"url"
] | |
ieunfv | How do touch screens know the difference between an object and your finger? | Technology | explainlikeimfive | {
"a_id": [
"g2jhaal"
],
"text": [
"Short answer:They don't. Long answer is that they work by generating an electric field and can detect when that electrical field is grounded when you touch it with something that can easily conduct current like your finger. Things that don't conduct current won't trigge... | [
"url"
] | [
"url"
] |
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