q_id stringlengths 6 6 | title stringlengths 4 294 | selftext stringlengths 0 2.48k | category stringclasses 1
value | subreddit stringclasses 1
value | answers dict | title_urls listlengths 1 1 | selftext_urls listlengths 1 1 |
|---|---|---|---|---|---|---|---|
lvnzp5 | How were syringe needles first made? | These types of needles are pretty small and also hollow. From what I could find, they were invented in the 1840's so technology was already advancing, but I don’t understand how were they made without modern means. | Technology | explainlikeimfive | {
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"gpcv4r8"
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"text": [
"> An Irish physician named [Francis Rynd]( URL_2 ) invented the hollow needle and used it to make the first recorded subcutaneous injections in 1844. This link has a picture of His form of hypodermic syringe if you want to look at it. It appears as though this would not... | [
"url"
] | [
"url"
] |
lvqgie | why does a tv make small purple dots when in contact with a finger | Technology | explainlikeimfive | {
"a_id": [
"gpd80vl"
],
"text": [
"Liquid Crystal Displays or LCDs work by polarizing or not-polarizing (passing or blocking) the light coming through from the backlight. When you press on an LCD, you are deforming the crystals (bending them), which causes them to change their polarization a little. [Her... | [
"url"
] | [
"url"
] | |
lw0la3 | Is Open Source Encryption really more secure than Close Sourced Encryption | And how so? It feels like because everyone can see the code, it would be less secure, but many people say that programs like signal and bitwarden which use open source encryption are far better than other closed sourced alternatives. | Technology | explainlikeimfive | {
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"text": [
"They are, not from a technical perspective (both open and closed source software can be great, and both can be trash), but from a philosophical perspective. Encrypti... | [
"url"
] | [
"url"
] |
lw2cj3 | When you turn a cable television on with a remote, is the TV or cable box actually responding directly to the remote, and how is the other triggered? | Technology | explainlikeimfive | {
"a_id": [
"gpexach",
"gpexdbu"
],
"text": [
"They are both always listening for a signal. When they receive a signal they are programmed to respond to in a certain state then they act. Example: Your TV recognizes when you hit the volume button even when off, but will only turn the volume down when t... | [
"url"
] | [
"url"
] | |
lw7gmc | Why is it that when mixing colors on computers/phones, the maximum “amount” you can use of each is specifically 255? | Technology | explainlikeimfive | {
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"gphk9et",
"gphkpf4",
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"text": [
"When you have a byte ( 8 bits ) to represent the color, the values are between 0 and 255 because in binary that’s the maximum value 11111111",
"Rgb are historically store as 6 hexadecimal Numbers (2 for each color). 2x16=256 possibiliti... | [
"url"
] | [
"url"
] | |
lwa69s | What’s the difference between A.I and a really clever piece of software or computer? | We are seeing a lot these days about A.I but I have seen a few things where I’ve thought, that’s just something a piece of software can do...why are we now calling it A.I? | Technology | explainlikeimfive | {
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"gpg8ed5",
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"text": [
"Well, \"AI\" means so many things that it doesn't mean much, it's very like \"software\" in that regard. The best chess and Go players are programs, but their \"intelligence\" is very, very narrow. The better term might be AGI, artificial general intellig... | [
"url"
] | [
"url"
] |
lwean5 | Blu-ray resolution | Why do some remastered films released on Blu-ray mention a “4K Scan” when the blu-ray resolution output is limited to 1080p? | Technology | explainlikeimfive | {
"a_id": [
"gpgvsoh",
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"text": [
"What they have done is scanned the original film in 4K format and then digitally downsampled it to HD. Normally the digital downsampling process is able to do this process smarter and are able to preserve a lot more features then if you were to scan the f... | [
"url"
] | [
"url"
] |
lwgavj | What's the difference between measuring a person's temperature and an object's temperature? | I got a contactless thermometer, one of those ones that you just hold near your forehead for a sec. It has different modes for measuring your body temperature and measuring object temperature (plus a room temperature one), and doing a reading on my own forehead in each mode gives different numbers. Why is there a need ... | Technology | explainlikeimfive | {
"a_id": [
"gph7v1d"
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"text": [
"Some surfaces radiate heat better than others, just like some surfaces reflect light better than others. When the thermometer only registers a small amount of heat being radiated by whatever you're pointing it at, that may indicate that the object is cold. But the objec... | [
"url"
] | [
"url"
] |
lwk51n | Why did 16:9 become the standard widescreen format despite 21:9 being the normal aspect ratio for cinema and optimal for content consumption? | Technology | explainlikeimfive | {
"a_id": [
"gphv88t",
"gphv938"
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"text": [
"It was the only ratio that fit neatly in all existing standards at the time. see this [image]( URL_0 ) There are numerous sites on the topic. URL_1",
"There were a lot of different sizes being experimented with. First of all 21:9 isn't some magic stan... | [
"url"
] | [
"url"
] | |
lwk6tr | What makes headphones "high quality"? | Bassy headphones, noise canceling, what makes them sound better then a pair in walmart on a technological level? Edit because I couldnt explain properly: Im asking what makes the sounds and why cheap headphones less great. | Technology | explainlikeimfive | {
"a_id": [
"gphzej4",
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"gpi1vkb"
],
"text": [
"The strength of the magnets used to make the sound. Rare earth elements are required to make magnets strong enough to make \"high quality\" sound. That's why those knock off airpods don't sound quite as good as the real thing... | [
"url"
] | [
"url"
] |
lwth5v | Is there a difference between a high end CPU running at 5GHZ and a low end (overclocked) CPU running the same speed? Without counting the obvious CORE count | Technology | explainlikeimfive | {
"a_id": [
"gpj3xow",
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"gpjl8k3"
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"text": [
"Your CPU is not only the clock speed. There are other factors, like cache size, PCIe version, drivers, and so on. If your CPU runs at 5GHz standard it is probably much newer and has not only a better clock speed, but is bette... | [
"url"
] | [
"url"
] | |
lwttvb | What is the difference between Stack and Heap Memory? | Technology | explainlikeimfive | {
"a_id": [
"gpj5axr"
],
"text": [
"The way things are added and removed is the main difference. Heap is like a pile of leaves where you can add leaves and remove them as needed. Stack memory is a FILO(First In Last Out) queue. It's like a can of Pringles. You can only take out the top chip. If you want t... | [
"url"
] | [
"url"
] | |
lwxxzm | Why are car's external temperature reading so wildly inaccurate for the dust few minutes of driving? | Edit: first, autocorrect changed it to dust 50F out, I get in my car and it's reading 64F out, drive for 5 minutes and it's reading 50F. Why is this? | Technology | explainlikeimfive | {
"a_id": [
"gpjsgzm"
],
"text": [
"The sensor is traditionally located somewhere on the bottom of the engine compartment. It has to be outside of the main body of the car, and it also can't be above the engine or it would pick up engine heat as it rises. The problem then is that it's really measuring the... | [
"url"
] | [
"url"
] |
lx077z | where is my cloud storage based? Like physically? | Hey ELI5! I was wondering today where the physical storage for cloud storage is. Like actually located? For specifically OneDrive from Microsoft | Technology | explainlikeimfive | {
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"gpk61zh",
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"text": [
"In some data center, somewhere, and for redundancy reasons, likely in more than one location. So what the hell are these? Basically they are just immense warehouses on some random plot of land so... | [
"url"
] | [
"url"
] |
lx1m1r | How do camera stabilizers work? | Technology | explainlikeimfive | {
"a_id": [
"gpkkvzs"
],
"text": [
"There are two main types of camera stabilizers. The simple version has the camera on a rod that can move freely and weights at the other end. The more weight, the more movement is dampened between the handhold and the camera. Gyro stabilisers like the ones for hobby dro... | [
"url"
] | [
"url"
] | |
lxbbn4 | Why is lithium so important for electronic vehicles? | Technology | explainlikeimfive | {
"a_id": [
"gpm3619"
],
"text": [
"Electric vehicles, unlike internal combustion engine vehicles, cannot generate power on demand. They have no fuel to burn. Instead, they must be charged and must store energy for when they need to drive. We use batteries to store energy. We're much better at generating ... | [
"url"
] | [
"url"
] | |
lxf7v1 | In a world full of VPNs, how do governments and corporations point a finger at a certain country for hacking their infrastructure? | Technology | explainlikeimfive | {
"a_id": [
"gpn7gd3",
"gpmroe6"
],
"text": [
"Some methods of identifying the origin of the attackers could include looking at the code of the malware; what languages are used? Although this has been used by attackers in the past to pose as another nation (the creator of the Mirai botnet wrote \"i lo... | [
"url"
] | [
"url"
] | |
lxi0at | How can themeparks snap a crystal clear picture of you on a rollercoaster going 70mph | Technology | explainlikeimfive | {
"a_id": [
"gpn3gfj",
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],
"text": [
"Motion blur occurs when the camera takes too long to generate the image. By the time the last bit of information is taken, the image has changed noticeably. So if all the information is taken in a very short mo... | [
"url"
] | [
"url"
] | |
lxjwb8 | what does Spring Boot do? | Reading about the framework Spring and having trouble understanding what Spring Boot and Spring Batch does if someone has a simple analogy and what was the old way of doing things and what Spring solves? | Technology | explainlikeimfive | {
"a_id": [
"gpndpr5",
"gpnem7y"
],
"text": [
"I don't have extensive experience in it so I'm sure others can explain some of the finer points, but one of the major things it does is it's a standalone web application. You don't need to configure a web server, or manage server settings, or anything lik... | [
"url"
] | [
"url"
] |
lxl5kc | Why do computers slow down, but then you restart them and they work again? | Could you explain in the form of an analogy? Also, has this improved over time? Does it have anything to do with registry and defrag? Is it different for Mac vs PC? Thank you :) | Technology | explainlikeimfive | {
"a_id": [
"gpnldiv",
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"text": [
"* Think about a computer like this: * You are sitting at a large desk next to a huge set of bookshelves. * You are the CPU * The table is the system memory (RAM) * The bookshelves are the system storage (Hard Drive, SSD, external drives etc... | [
"url"
] | [
"url"
] |
lxm1yp | Why is Tom Cruise typically used as the deep fake model? | Technology | explainlikeimfive | {
"a_id": [
"gpno34p",
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"gpnonj0"
],
"text": [
"Because Tom Cruise is both instantly recognizable and *just* ~~crazy~~ unpredictable enough that you’ll likely believe the deep fake for at least a moment.",
"Deepfake and other image stitching technologies like it require a good amount... | [
"url"
] | [
"url"
] | |
lxq171 | Why are SSDs reliable for long-term storage, but USBs fail within a few years? | Since both SSDs and USBs use flash storage. I tried searching online and found [this thread]( URL_0 ) and [this video]( URL_1 ), which were somewhat helpful but not entirely. Does anyone have a great analogy or digestible summary? | Technology | explainlikeimfive | {
"a_id": [
"gpod06k"
],
"text": [
"Different levels of reliability in the controllers and how they're built. The basic storage technology is the same but SSDs use a much more robust construction that can withstand more read/write cycles before they accumulate too much damage to function, more sophisticat... | [
"url"
] | [
"url"
] |
lxw1k0 | Our brain uses about 10W of power, when a computer can use 100W. With our brain doing significantly more than a computer, how is it so much more efficient? | Technology | explainlikeimfive | {
"a_id": [
"gppaaan",
"gppc5j2",
"gppjuiu"
],
"text": [
"Your brain is nothing like a computer, architecture-wise. Computers use programs that are millions of simple instructions from a set of a couple hundred instructions. The brain is parallel, executing a few hundred instructions from a set of... | [
"url"
] | [
"url"
] | |
lxzker | How does a phone/computer process the power button being pressed if it’s off? | I tried google and all I got was “pressing the power button to turn it off won’t damage it anymore.” | Technology | explainlikeimfive | {
"a_id": [
"gppxtiq",
"gppy3s2",
"gppvgiz"
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"text": [
"There are two basic solutions, but in both the button is really just a signal, it’s not the actual source of power to the entire device. In the first, the device is not 100% off, but rather there is a tiny circuit still awake drawing a **ve... | [
"url"
] | [
"url"
] |
lxzyk7 | What is an NFT? | Technology | explainlikeimfive | {
"a_id": [
"gppyggl"
],
"text": [
"Nft stands for non fungible token. It is a way to digitally represent ownership of something digital (NBA topshots is a good example of this) backed by the same technology that underpins crypto currencies. It's called a block chain, and uses encryption and distributed c... | [
"url"
] | [
"url"
] | |
ly3sen | How does touch-screen work? | Technology | explainlikeimfive | {
"a_id": [
"gpqlqwr",
"gpqlvqx"
],
"text": [
"(I hope this doesn’t sound condescending or pretentious, I’m literally gonna try explaining like you’re five, not that this is an easy or intuitive thing to understand) Throughout our bodies we have nerves and they send electricity to our muscles and make... | [
"url"
] | [
"url"
] | |
ly4xyg | how does remastering old videos which had a lower resolution into HD or a higher resolution work? | Technology | explainlikeimfive | {
"a_id": [
"gpqrywl",
"gpqs5lv"
],
"text": [
"It was shot on physical film. Film doesn't have a resolution the same way that digital video does. And it captures a lot of detail, so you can scan it in 4K no problem.",
"URL_0 If the original was only on video then nothing you can really do since th... | [
"url"
] | [
"url"
] | |
ly66ae | What is the crunchy sound you are hearing when a hard drive is reading and writing data? | Technology | explainlikeimfive | {
"a_id": [
"gpqyfel",
"gpqydod"
],
"text": [
"Take a look at this diagram of a hard drive. URL_0 The hard drive consists of spinning metal platters, a read head that overs over those platters and an arm that moves the head into position. The crunching sound you're hearing is the arm moving the read h... | [
"url"
] | [
"url"
] | |
ly6f1c | How do VPNs work? | I understand there are general concepts like Full and Split tunnel, I just can’t grasp the concept according to textbooks. What makes different models...well, different? | Technology | explainlikeimfive | {
"a_id": [
"gpr01hp",
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"text": [
"i'magine your computer is your home. regular, unprotected connection to the internet is done by using your front door or window... everyone can see when you come, when you go, and if you have visitors or deliveries. using vpn's is like digg... | [
"url"
] | [
"url"
] |
lyex9p | How do those walk-through scanners in libraries know if you're taking a book without borrowing it, especially if those books don't have metal inserts or anything like that? | How does the library borrowing system work? and how come even if there is no obvious metal insert in the book those gates still know when and when not to beep if the book has or hasn't been borrowed? & #x200B; EDIT: Thank you all so much for the answers!! : D | Technology | explainlikeimfive | {
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"gpsad2q",
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"gptdkn6",
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"gpu7l25",
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],
"text": [
"> especially if those books don't have metal inserts or anything like that? Because it DOES have metal inserts. They are... | [
"url"
] | [
"url"
] |
lyispi | How do the wave making machines at pools work | Technology | explainlikeimfive | {
"a_id": [
"gpswxyq",
"gpu06hf",
"gpt71hy",
"gptd88l"
],
"text": [
"Pretty simple, really. They have a mechanism that moves large pieces in the bottom of the pools, like the floor or a section in the back. The faster they move those sections, the more energy is put into the water, and the big... | [
"url"
] | [
"url"
] | |
lyjvhy | Cryptoart and NFT being bad for environment | I tried to read an article and google, but I still don't get it. Also, as a freelance artist should I make this? Is this a fad? Is it like pixel art? | Technology | explainlikeimfive | {
"a_id": [
"gpta4uh",
"gpt3zyj"
],
"text": [
"> Is this a fad? Probably yes, it is certainly a bubble. But it will probably stick around like a bad rash like cryptocurrency. > Is it like pixel art? No. > I still don't get it. It is “art” where ownership is secured by blockchain. Blockchain is a kind ... | [
"url"
] | [
"url"
] |
lyrb97 | How does a polygraph measure whether someone is lying? | Technology | explainlikeimfive | {
"a_id": [
"gpujuqc",
"gpugy5x",
"gpukusb",
"gpuofiq",
"gpujmjl"
],
"text": [
"They don't. It measures things like breathing rate & pulse. It only detects their body's functions. They ask questions to which the individual is instructed to tell the truth or lie so they can calibrate it. Lo... | [
"url"
] | [
"url"
] | |
lyw998 | How are so many bits stored in a terabyte hard drive? | If I understand this correctly, a terabyte has 8 trillion bits. What amazes/confuses me is how we can fit *8* *trillion* individual little switches on such a small space and on top of that, accurately read data from it in the blink of an eye? I've tried my best to look into the topic online but can't find any (helpful)... | Technology | explainlikeimfive | {
"a_id": [
"gpvso6q",
"gpwkqw7"
],
"text": [
"Different for HDD and SSD. HDD is just a very thin magnetic layer, the trick is to magnetize just a very small area by applying a short impulse of magnetic field with your read/write head. So it's pretty much like a CD, a bit is like a tiny \"hole\" but i... | [
"url"
] | [
"url"
] |
lyzq21 | What the heck is Cryptoart? | I feel so dumb cause I've been reading so many explanations about it but I just can't seem to get it! | Technology | explainlikeimfive | {
"a_id": [
"gpyg8yn"
],
"text": [
"I'm going to skip all the math because it's not really important and other people have done really good explanations. Cryptocurrency works a lot like regular-cash-currency - if you have some, nobody else can take it from you without you spending it, you can easily trans... | [
"url"
] | [
"url"
] |
lz1kr7 | how is my electronic device able to control the flow of electricity to parts such as camera without there being actual physical switches | Technology | explainlikeimfive | {
"a_id": [
"gpy4b1e",
"gpy78rq"
],
"text": [
"Transistors are electronic switches, when you apply a voltage to them they allow current to flow. This means you can use electricity to control how electricity flows, by connecting transistors together you can use them to do logical operations and eventua... | [
"url"
] | [
"url"
] | |
lz2fql | The "buzz" sound happens when you got phone near your speakers and someone is about to call you. Why does the sound sometimes happens even if noone is calling you? | Technology | explainlikeimfive | {
"a_id": [
"gpyesp8",
"gpyh53a"
],
"text": [
"Phones regularly communicate with towers to know what they're in range of. Sometimes you can be within similar range of 2 towers and your phone will switch back and forth. I havent noticed this sound since pre-3G services were discontinued in Australia. W... | [
"url"
] | [
"url"
] | |
lza0rn | How can you match up two light switches for one light bulb? | Technology | explainlikeimfive | {
"a_id": [
"gq0bsyu"
],
"text": [
"Your hallway light is connected to a three-way switch circuit. It uses an extra pair of wires called traveler wires to allow two switches to control a single device. The only way to do what you want is to rewire the second switch and switch the traveler wires."
],
"... | [
"url"
] | [
"url"
] | |
lzc06g | What actually happens when a website undergoes scheduled maintenance? Why can’t they stay online to make the changes? | Probably a stupid question, but I’m a stupid person so ;-; | Technology | explainlikeimfive | {
"a_id": [
"gq0ycpo"
],
"text": [
"It depends on a lot of things. It is rarely the same thing twice. But today you usually only get downtime when something involves a database or storage. I have been part of scheduled maintenance on a website caused by the fact that the station wagon we were loading all ... | [
"url"
] | [
"url"
] |
lzfbua | How do noise cancelling headphones/earphones work? | Technology | explainlikeimfive | {
"a_id": [
"gq1sxsv",
"gq1xcyv",
"gq1zwcw",
"gq20hxn"
],
"text": [
"There’s electronics inside that listen to the ambient noises around you, then they do what’s called phase cancellation where it makes a sound similar to it and puts it out of phase. The two noises then cancel each other out c... | [
"url"
] | [
"url"
] | |
lzl9yn | Why does task manager close stuff so much faster than normal closing methods? | Technology | explainlikeimfive | {
"a_id": [
"gq2r57p",
"gq2ssy4",
"gq2r4kz"
],
"text": [
"When you use the normal method to close a program it's going to close that program from within the program itself and it's going to run very specific code. For example, in a video game if you were to close it the developer might make it so ... | [
"url"
] | [
"url"
] | |
lzsuwt | Cloud-native applications. | Technology | explainlikeimfive | {
"a_id": [
"gq3uely"
],
"text": [
"Depends slightly on context mostly a buzzword. If you see it as a consumer it could mean anything from it doesn't run on your machine to developed specifically for the cloud. In a technology sector (think your a developer, engineer, or operations guy looking for a job) ... | [
"url"
] | [
"url"
] | |
lzt806 | If the Ancients (Egyptians, Greek, etc.) figured out so many things about the world, why did it take figuring them out again to give them proper credit? Why wasn’t there progress based on the fact they figured it out? | Technology | explainlikeimfive | {
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"gq3vnpo",
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"gq4buht",
"gq4byvd",
"gq4jtk8",
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"text": [
"There were progress being made on their discoveries all the time. It was just slow. There is a continuous line of discoveries from the Egyptians, Babylonians, Greek, Romans, Egyptians again, Arab... | [
"url"
] | [
"url"
] | |
lztlau | How do software bugs and glitches develop over time if there is no organic matter? Does digital, intangible software also suffer from "wear and tear"? | Always seemed weird to me that perfectly functioning software can develop a glitch or an error over time, what causes it to degrade? I just don't understand how something intangible can become corrupt or broken over time. | Technology | explainlikeimfive | {
"a_id": [
"gq3wnm4",
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"gq3x6k6",
"gq3zxv6",
"gq4ywp3",
"gq4b196",
"gq414tt",
"gq3x29g",
"gq4002k"
],
"text": [
"Software glitches rarely develop over time. It usually just takes time to discover them because they’re often only replicated in certain circumstances... | [
"url"
] | [
"url"
] |
lzv5ti | What is the purpose of "buying" tweets ? Purpose of "owninig" NFTs? | You are still using it "digitally" (i.e seeing it digitally after buying) so why to spend money on it rather than just save those as images if you want on your computer ? | Technology | explainlikeimfive | {
"a_id": [
"gq4be0m"
],
"text": [
"There’s no purpose except enjoyment. The point is to make a digital version of baseball cards. Because there’s no scarcity in the digital realm, these companies hope that by releasing a limited number of tokens, the tokens will be seen as collectibles. So, for instance,... | [
"url"
] | [
"url"
] |
lzzre1 | How is hydrogen (fuel cell?) used as a fuel source and why isn’t it more widespread? | I’ve been looking into renewable energy and other options relative to nuclear (not a big fan because of the waste), solar, wind, and thermal. Hydrogen fuel cell technology has popped up a bit and I’m wondering how this works. With my basic understanding, hydrogen is used as input and water (two hydrogens and an oxygen)... | Technology | explainlikeimfive | {
"a_id": [
"gq51dqm",
"gq52ajx",
"gq52n92",
"gq5gl6r"
],
"text": [
"Because it's not really a fuel source as much of an energy storage system. The hydrogen needs to be created from water using electrolysis, and it will use as much electricity to do that as it would take to make an electric ca... | [
"url"
] | [
"url"
] |
lzzwxm | Why do streaming services care about the number of episodes viewed in a sitting. | I like to have background noise throughout the day which results in Netflix and Hulu continuously asking for me to “make sure I’m still here”. My question is why does it matter to them? | Technology | explainlikeimfive | {
"a_id": [
"gq5213h",
"gq526br"
],
"text": [
"Using their service costs them money for bandwidth or whatever. Streaming to an empty room or to a sleeping person costs them more.",
"You have to remember, they have millions of customers. Bandwidth (used to deliver the stream to you on demand,) isn'... | [
"url"
] | [
"url"
] |
m04nln | If a company or website gets hacked, why does it matter how strong my password is? Isn’t it more important that I don’t re-use a password? | If a site gets hacked, am I at any sort of advantage by having a complicated password, or does it not really matter at that point? | Technology | explainlikeimfive | {
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"gq5wtr4",
"gq5wrai",
"gq66jlf",
"gq62dhx",
"gq5ykn3"
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"text": [
"Any company worth its salt will store your password in a form called a hash. This is you password scrambled up and reduced in size with math, so it’s near impossible to get your original password back. The stan... | [
"url"
] | [
"url"
] |
m06wbq | What are NFTs, NFT art and how is it possible that someone can make money selling a JPEG or gif that is already viewable/downloadable by almost anyone? | Technology | explainlikeimfive | {
"a_id": [
"gq6f53y",
"gq6azxa"
],
"text": [
"An NFT is pretty much a certificate of authenticity for digital items. Let's say an artist paints a painting, and then also sends it to print (meaning you can have hundreds or even millions of copies). But there is only one original, that the artist herse... | [
"url"
] | [
"url"
] | |
m0bsyw | What does it mean that Google won't allow third party cookies in Chrome? No more third-party analytics firms collecting data on me while using Chrome? | Technology | explainlikeimfive | {
"a_id": [
"gq70be5"
],
"text": [
"No more third party analytics firms collecting your data *through cookies*. There are a bunch more ways they can identify you though. Also third party basically means \"anyone who doesn't have a contract with google\" wich is basically just them receiving a monopoly on ... | [
"url"
] | [
"url"
] | |
m0e71g | What is the difference between digital and analog audio? | Technology | explainlikeimfive | {
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"gq7t3ts",
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"gq7al5z",
"gq8fpfu",
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"text": [
"OK, here's a really ELI5: Soun... | [
"url"
] | [
"url"
] | |
m0f04g | How does reCAPTCHA know I'm human just because I ticked a box? | Technology | explainlikeimfive | {
"a_id": [
"gq7eik4",
"gq7elf3",
"gq7ht82"
],
"text": [
"It actually record the movement before ticking the box. If your movement are too \"robotic\" (pure straight lines, instant teleportation of cursor, miliseconds reflexes) the recaptcha consider you might be a bot.",
"Robots generally eit... | [
"url"
] | [
"url"
] | |
m0fwvc | How do USB Flash Drives store information? | Technology | explainlikeimfive | {
"a_id": [
"gq7kpuz"
],
"text": [
"Each bit is stored in a MOSFET transistor. A transistor have three terminals. A source and drain for the current and a gate which controls if the transistor will allow current through or block the current. So be charging or discharging the gate we can controll if a sign... | [
"url"
] | [
"url"
] | |
m0gzen | How do touchscreens work? | Technology | explainlikeimfive | {
"a_id": [
"gq7sp5h"
],
"text": [
"Touch screens are essentially a large surface of open electrical circuits. Your finger is electrically conductive so when it presses a part of a screen it completes a tiny circuit and the device registers this as a \"touch\" at that point. In order to register a touch y... | [
"url"
] | [
"url"
] | |
m0i0yd | How does resolution upscaling and remastering works in retro video games and movies? | Technology | explainlikeimfive | {
"a_id": [
"gq7yhvd",
"gq81ka3"
],
"text": [
"Imagine you have 5 dots on a piece of paper, in a line. You could take a pencil and draw that line through the 5 dots. Now, looking at your line, you could draw lots more dots on the same line - maybe 50 or 100! A computer can use math to look at an exist... | [
"url"
] | [
"url"
] | |
m0mlb0 | What is a computer actually doing when it fully deletes a file, and why are some files too big to go into the trash so they have to be "deleted permanently?" | Technology | explainlikeimfive | {
"a_id": [
"gq8nkdv",
"gq8netg",
"gq8ni5q"
],
"text": [
"When you \"fully delete\" a file, the computer doesn't automatically and instantly do anything - it just tells the hard drive \"hey you can write over that old data with new data if you need to\". That's why it's possible in some cases to r... | [
"url"
] | [
"url"
] | |
m0qvlo | Film is rearranged metal particles on tape which are read by an electromagnet. CDs are discs with burned pits in them which are read by a laser. What makes one analog and one digital? | Technology | explainlikeimfive | {
"a_id": [
"gq9cqpv",
"gq9cu97",
"gq9d1z4",
"gq9ctjk"
],
"text": [
"CDs pits represent binary data, on or off. Film's particles (or grain) can be any color, making it analog. A good way to determine if something is analog vs digital is how the smallest unit of measurement can be measured. If ... | [
"url"
] | [
"url"
] | |
m0zrwu | How do traffic lights work? Sensors, timing, connection with other traffic lights ... the whole shebang. | Technology | explainlikeimfive | {
"a_id": [
"gqarwtq",
"gqbi1uy"
],
"text": [
"At the most basic level, the traffic lights have a pre-programmed controller. The controller tells the light how long to show each colour to each direction. If the controller is a bit fancier, it will allow the program to be different at different times o... | [
"url"
] | [
"url"
] | |
m17w2b | Why are circuits on boards? | Technology | explainlikeimfive | {
"a_id": [
"gqbznwv",
"gqc1c0l",
"gqc014h"
],
"text": [
"Before circuit boards were a thing, designers had to scramble wires together in a big ugly mess. I don't have all the details of this organization, but imagine a bunch of tangled up wires, capacitors, etc. Circuit boards not only rid of tho... | [
"url"
] | [
"url"
] | |
m17y1p | What is exactly happening when AC power is being converted to DC energy? | Technology | explainlikeimfive | {
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"gqc35rq",
"gqcy1ip",
"gqc5689",
"gqdawyf",
"gqc1nyz",
"gqd5oxy"
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"text": [
"There are electronic components called diodes. These are sort of like one-way streets for electricity. If you try to pass AC through one of these, only half the wave will get through, say the pos... | [
"url"
] | [
"url"
] | |
m19zus | What are some of the problems that zinc-ion batteries have, over lithium ion? | I've read in an article that aqueous zinc ion batteries are better, safer, and can store up to 5 times the charge of lithium ion. What are some of the major concerns that has made zinc-ion batteries not so much popular? One thing that I was able to get from the article was that it can last for only 100-200 cycles? Edit... | Technology | explainlikeimfive | {
"a_id": [
"gqcg268",
"gqdv47m"
],
"text": [
"Where are you seeing this 5 times charge figure? According to Wikipedia (obviously not the be-all and end-all, but still) zinc-ion batteries are around 450 Wh/l energy density, while Li-Ion are between 250 and 693, which is pretty much the same ballpark."... | [
"url"
] | [
"url"
] |
m1ae5t | Why is there significant positional variation in mobile data speeds even inside a single room? | Technology | explainlikeimfive | {
"a_id": [
"gqcl4x8"
],
"text": [
"Mobile phone signals are typically in the hundreds of MHz to a few GHz range, which means the wavelengths are something like 10-40cm. Objects roughly that size can reflect or absorb the radio signal, causing blank spots and interference (both constructive and destructiv... | [
"url"
] | [
"url"
] | |
m1aeqm | Regarding cookies on website: What is legitimate interest and how do companies get the status? | Also, what rights to store cookies do they have when you object to their regular cookies but do not tick off the legitimate interest option? | Technology | explainlikeimfive | {
"a_id": [
"gqco5wj"
],
"text": [
"Most companies don't actually do this correctly. There are two different data privacy laws in the EU which potentially govern cookies, and companies get these confused. The main data privacy law in the European Union is GDPR. Under GDPR, in order for data processing to ... | [
"url"
] | [
"url"
] |
m1cn3r | Why exactly are bitcoins solving problems when mining? | What are the use of the solution to these problems. It's just to verify other transactions? So bitcoins are earned from just maintaining itself? | Technology | explainlikeimfive | {
"a_id": [
"gqcv5mj",
"gqdcswq",
"gqcv1vz"
],
"text": [
"There are two uses...one is to secure the blockchain, the \"ledger\" of all bitcoin transactions that ensures that you can't duplicate them. The solution of the bitcoin mining problem is basically a \"key\" that takes a lot of work to find ... | [
"url"
] | [
"url"
] |
m1fhrf | How is a computer animated movie transferred to film? I'm thinking of Toy Story specifically. 1995 was before digital projection, so how did PIXAR get the final movie onto celluloid? | Technology | explainlikeimfive | {
"a_id": [
"gqdf1h1",
"gqdbupq",
"gqdhxiv"
],
"text": [
"Pixar developed a laser scanning and printing device called PixarVision. With it they can scan film into a computer and also print images from the computer to film. So the entire film was printed onto master negatives one frame at a time",
... | [
"url"
] | [
"url"
] | |
m1fnfq | How does cryptocurrency like Bitcoin contribute to climate change? | I've been seeing lots of articles about how Bitcoin and other cryptocurrencies are leaving massive carbon footprints that negatively affect the climate. But after doing a little research, I'm still not entirely sure how that connection is made? How is crypto more harmful to the climate than actual paper money, or even ... | Technology | explainlikeimfive | {
"a_id": [
"gqdmdr1",
"gqi2ny6",
"gqdnb5t"
],
"text": [
"Mining crypto takes a lot of power. As their value increases, and mining success rates decrease, the power investment required to find each new coin increases. The entire currency is based on burning through electricity to do maths problems... | [
"url"
] | [
"url"
] |
m1hq4c | How do 3d glasses work and what do the red and blue lines have to do with it? | I remember that when I took off the glasses, the movie appeared to be a red version overlapping a blue version, searched on the internet but it was too technical for me. | Technology | explainlikeimfive | {
"a_id": [
"gqdpny2",
"gqdpdsw"
],
"text": [
"You're able to see the world in 3D because your eyes see things from two different angles which your brain turns into a 3D image. Color filters absorb everything but a particular color. If you look through a blue filter, you'll see nothing but the shade o... | [
"url"
] | [
"url"
] |
m1nxp5 | What about using screens is bad for sleep? | I often hear that you shouldn't look at screens 30 minutes before bed to rest your eyes, which makes some inherent sense, but often paired with that is that you should read before bed. Is scanning ~450 wpm really all that different from watching TV? If so why? | Technology | explainlikeimfive | {
"a_id": [
"gqentas",
"gqepdem",
"gqer74z"
],
"text": [
"Screens give off a lot of blue light, just like the sun. Your body uses the light around you to determine when it's time to go to sleep. Too much blue light confuses your brain into thinking the sun is still out and prevents you from being ... | [
"url"
] | [
"url"
] |
m1ofk7 | Why does it take so long to change a channel on modern TVs? | Technology | explainlikeimfive | {
"a_id": [
"gqevfm8",
"gqeu5rq",
"gqf2dpa",
"gqf2o1t",
"gqfg2so"
],
"text": [
"Old TVs were analog. The signal was encoded in a simple way than needed just basic electronics to decode and display. This was fast, so old TVs changed channels quickly. However, such a method of transmission w... | [
"url"
] | [
"url"
] | |
m1ofuo | Why do audio mixers have plugins labeled as multiple channels and how are they utilized? | I look at a 12 channel audio board and I see that there's only 2 inputs; one for channels 9/10 and another for 11/12. What is this and how is it utilized. Its also almost always a 6.5mm input so what does that mean? Thanks. | Technology | explainlikeimfive | {
"a_id": [
"gqer2fp"
],
"text": [
"The 9/10 and 11/12 inputs are TRS stereo 1/4\" inputs. TRS stands for tip-ring-sleeve and carries a stereo signal. A 6.5mm connector is a standard 1/4\" cable. Oldschool headphones used 1/4\" connectors, while new headphones use 1/8\" TRS connection. Does that answer yo... | [
"url"
] | [
"url"
] |
m1uffm | How did they make ice before modern refrigerators? | before modern refrigerators and air conditioners people used ice but how was the ice made? | Technology | explainlikeimfive | {
"a_id": [
"gqfk8s2",
"gqfmtp4",
"gqfkke6",
"gqfnjwp",
"gqgef1t",
"gqfkvt3",
"gqfkpk6"
],
"text": [
"They waited for it to get cold and then harvested ice from bodies of water. They would then store the ice in insulated boxes so it would last for a longer time.",
"The classic ... | [
"url"
] | [
"url"
] |
m23wf4 | How does a car radio know the name of the station, and the song playing ? | Technology | explainlikeimfive | {
"a_id": [
"gqh2c5d"
],
"text": [
"There is a standard for this called the Radio Data System. It is a low bandwidth data signal that is sent on the audio but at three times the frequency of human hearing. So people can not hear it but a chip in the radio will be able to decode it. There is not much bandw... | [
"url"
] | [
"url"
] | |
m26qkq | How can objects like laundry machine buttons ‘beep’ when they don’t have a speaker to emit the sound? | Technology | explainlikeimfive | {
"a_id": [
"gqhisi2",
"gqhib2o"
],
"text": [
"A lot of consumer electronic devices do have a [piezo-electric speaker]( URL_0 ). It can't reproduce complex sound like human speech, but it can make beeps. The speaker may be hidden behind a plastic control panel and still be audible. There is a [microco... | [
"url"
] | [
"url"
] | |
m29s6c | Why did we ran out of IPv4 addresses but not out of phone numbers? | Technology | explainlikeimfive | {
"a_id": [
"gqhz1e0",
"gqi1c78",
"gqhzojx",
"gqi15t7"
],
"text": [
"Let’s do some maths, there are 4 numbers in an ipv4 address and each one can be 0-255, so 256^4 is about 4 billion A phone number has between 9 and 11 digits, downing on where you are that might change, so let’s pick 10. Each... | [
"url"
] | [
"url"
] | |
m2f3nd | How do we track Mars rovers if there is no global positioning system (GPS) on Mars? | Technology | explainlikeimfive | {
"a_id": [
"gqk9wfz"
],
"text": [
"We compare the images from satelites surrounding Mars using things like HiRISE if you are interested here is a [link]( URL_0 )"
],
"score": [
3
],
"text_urls": [
[
"https://blogs.agu.org/martianchronicles/2011/09/28/how-do-we-know-where-rovers-are-... | [
"url"
] | [
"url"
] | |
m2jpoa | Why were IPV4 addresses so limited, when MAC addresses were made so much larger? | Technology | explainlikeimfive | {
"a_id": [
"gqjk5h3"
],
"text": [
"Because MAC addresses have 48 bits while IPv4 addresses have only 32 bits. This means that for every IPv4 address there are potentially 2^16 MAC addresses. Why? Because they were defined by two different organizations. The people who came up with IP thought that 32 bits... | [
"url"
] | [
"url"
] | |
m2n6i7 | What is the most simple device that can be considered to have "software"? Does it have to be digital? | Does a mechanical timer have software? What about a wooden marble adding machine? An analog watch? A musical box? A digital watch? A hand-held calculator? Where does software begin? | Technology | explainlikeimfive | {
"a_id": [
"gqk7y9c",
"gqk5b0j",
"gqkdsne",
"gqkqvk7"
],
"text": [
"Here is an analog [programmable device]( URL_0 ) that ha been around for a long time. The software was similar to the punchcards we used to use with mainframe computers. I wouldn't say that the device is \"simple,\" except in... | [
"url"
] | [
"url"
] |
m2ou22 | Why does Rendering a Movie takes so long but a video game can render within milliseconds? | Technology | explainlikeimfive | {
"a_id": [
"gqkdl5e"
],
"text": [
"Video game scenes are much, much less complicated than animated film scenes, in terms of detail, depth, resolution, lighting etc."
],
"score": [
7
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
m2r4sd | What is NFT Art Theft? | i'm reading a lot of complaints from other artists that art theft is now easier than ever thanks to crypto NFT tokens - as far as i understand, now art thieves can attach an NFT token to an artwork and claim it as their own? i don't really understand that, because just claiming it as you own doesn't automatically take ... | Technology | explainlikeimfive | {
"a_id": [
"gqksyfl"
],
"text": [
"If I claim a NFT on a piece of art and then I sell that token, I am still profiting from the artists work. If the person I sold the token to then sells it to someone else, who can say that exchange wasn't legitimate? If the original artist tries to sell their original a... | [
"url"
] | [
"url"
] |
m2s9kw | How do shopping bots exactly work and what’s the best way to get rid of them? | Technology | explainlikeimfive | {
"a_id": [
"gqkxh99"
],
"text": [
"It's usually just a form of automation. They watch the store page for an item to be in stock, possibly with some limits like max price or something, and complete the order form with pre-configured information (like address, payment info, etc). Because it's an automated ... | [
"url"
] | [
"url"
] | |
m2sv9x | Why do they make power adapters so large that it’s difficult/impossible to plug something into the adjacent plug? | Technology | explainlikeimfive | {
"a_id": [
"gql0ogi",
"gqkz2k3",
"gqkyvae",
"gqlpu83",
"gqn3yow",
"gqm3mvi"
],
"text": [
"Laziness and to save money. Adaptors are ubiquitous and very inexpensive and a well designed small adaptor need not cost a lot more. Most of these adaptors are sourced-in. Few companies bother to... | [
"url"
] | [
"url"
] | |
m2uf63 | How do holograms work? | Technology | explainlikeimfive | {
"a_id": [
"gqlanfa"
],
"text": [
"Light has wave-like properties. One of those properties is wavefront interference. That means two beams of light can combine to make either more light than the individual beams or less light. (Sound also does this, that's how noise-cancelling headphones work.) The most ... | [
"url"
] | [
"url"
] | |
m30xbe | how does vga, dvi,hdmi, displayport,usb control each pixel of a monitor if the cable doesn't seem to have a wire for each and every pixel? | Technology | explainlikeimfive | {
"a_id": [
"gqma8yi",
"gqma9f3"
],
"text": [
"The cable is carrying a mostly serial signal...it's not sending data for every pixel at once, it's sending one or several pixels at a time (but so fast that the monitor can draw the whole display 60+ times per second). It's like how we can read a novel de... | [
"url"
] | [
"url"
] | |
m32sim | How does TensorFlow work? | Technology | explainlikeimfive | {
"a_id": [
"gqmlb3d"
],
"text": [
"Tensorflow allows python and JavaScript developers to use optimized machine learning algorithms without having to write them themselves. I’m currently building my own neural network for a college class so if you have a more specific question I can try to explain, but th... | [
"url"
] | [
"url"
] | |
m3588y | When art is being sold with an NFT, how is the image and ownership transferred? | Technology | explainlikeimfive | {
"a_id": [
"gqn1tdx"
],
"text": [
"The NFT blockchain only records a chain of transactions and, in theory, ownership. It does not transfer the actual work of art at all, it is more of a way to create an irreversible receipt independent even of governments. In fact not only does an NFT not transfer the or... | [
"url"
] | [
"url"
] | |
m36132 | Why does TestOut tell me 4G internet is capable of speeds up to 1Gbps? | I'm doing online courses, and a TestOut LabSim video I just watched was going over mobile internet connections. They claim 4G can reach speeds of 1Gbps, though I find that incredibly hard to believe as that would make my cell phone internet speed 20 times faster than my home computer's. Is this some kind of laboratory ... | Technology | explainlikeimfive | {
"a_id": [
"gqnab4j"
],
"text": [
"From the LTE Advanced Wikipedia page \"Three technologies from the LTE-Advanced tool-kit – carrier aggregation, 4x4 MIMO and 256QAM modulation in the downlink – if used together and with sufficient aggregated bandwidth, can deliver maximum peak downlink speeds approachi... | [
"url"
] | [
"url"
] |
m3737g | In software, what exactly is a framework? | Technology | explainlikeimfive | {
"a_id": [
"gqnry4v",
"gqna6u6",
"gqneoef",
"gqnd1h7"
],
"text": [
"A lot of people here are merely defining what a library is, which is just a chunk of code that someone else wrote that provides useful utilities. A framework goes further and creates an entire way of doing things. Often, it f... | [
"url"
] | [
"url"
] | |
m3aeix | Why is media not formatted to 16:9? | Mainstream (all?) TVs these days are 16:9 displays. Why is media not? Movies aren't, lots of YouTube content isn't. If 16:9 isn't the ideal ratio for content, why are our TVs? Do the black bars at the top and bottom "add immersion" of some kind? School me. | Technology | explainlikeimfive | {
"a_id": [
"gqnskhv"
],
"text": [
"Like most things in life, 16:9 is a compromise. Movies started off as 4:3 back in the beginning. As a result, TVs ended up being 4:3 to be able to show movies and shows shot on 35mm film. As technology advanced directors started to use wider formats to be able to give m... | [
"url"
] | [
"url"
] |
m3aym7 | Why did people in Texas get really high electricity bills? | Technology | explainlikeimfive | {
"a_id": [
"gqnw7c2",
"gqnuqig"
],
"text": [
"Imagine that you wanted to buy a hamburger, and go to the local hamburger restaurant. Now this hamburger restaurant is special, it takes all of the hamburgers that are cooked everwhere in the city and sells them to anyone who wants a hamburger. We will ca... | [
"url"
] | [
"url"
] | |
m3c85o | What is camera obscura? How and When it happens? | Technology | explainlikeimfive | {
"a_id": [
"gqoaeuz",
"gqo13ef"
],
"text": [
"Imagine you have a large TV screen facing a wall 2m away. The light from the TV is hitting the wall, but you can see a picture on the wall. It's just all fuzzy. This is because the light from the TV shines out in all directions. The top of the wall is get... | [
"url"
] | [
"url"
] | |
m3co8n | How does a phone know when another phone is calling them? How do they not get interrupted by other phone signals? | Sorry if the question doesn’t make any sense, I’ll try my best to restate it if it’s unclear. | Technology | explainlikeimfive | {
"a_id": [
"gqosd8d"
],
"text": [
"The cell phone tower will issue each phone with a time slot and frequency when it is allowed to transmitt and when to receive. When the phone is in standby the time slots will be very small and far between. But when the phone starts using data or a phone call is made th... | [
"url"
] | [
"url"
] |
m3on4o | Why do we need to free up some space for software updates? | It’s just frustrating sometimes especially my watch requires 3gb of space for it to update. Now I have to delete apps and data. Doesn’t it feel like a rip off? Shouldn’t be the update space separate? | Technology | explainlikeimfive | {
"a_id": [
"gqpzmu3",
"gqpz66o"
],
"text": [
"You need space in the kitchen to bring all the groceries in, before you're able to unpack them and put them away. You need space on your device to get the updates, before it's able to unpack them and install them.",
"You need to have space to download... | [
"url"
] | [
"url"
] |
m3v58y | How Does LIGHT Carry Data? | Technology | explainlikeimfive | {
"a_id": [
"gqr27v2"
],
"text": [
"The light used in fiber optics is of very specific frequencies. Like your local radio station. It is sent just like an electrical signal in that it is digital, meaning there are high points and low points. The high points could represent a one and the low points a zero.... | [
"url"
] | [
"url"
] | |
m3viq4 | Why does oil and grease make phones have that weird glitchy look when on a screen? It doesn’t happen with water | Technology | explainlikeimfive | {
"a_id": [
"gqs0lci"
],
"text": [
"bends the light, oil has the ability for a smear to split the whole light spectrum into colour parts With light hitting it you see one effect, with phone screen light hitting it you see another from the other side, the two together make it look trippy and glitchy"
],
... | [
"url"
] | [
"url"
] | |
m3wdvp | why do game console developer kits look ugly? | Technology | explainlikeimfive | {
"a_id": [
"gqrcnbq",
"gqrbosi"
],
"text": [
"Because designing nice looking cases costs money. Developers don’t care about the aesthetics of the computer/console they’re developing for; they care about the internal hardware and the software development tools. Studios don’t want to pay more for dev k... | [
"url"
] | [
"url"
] | |
m3wp66 | why do games have so many dll files? | Technology | explainlikeimfive | {
"a_id": [
"gqrc6m6",
"gqs6zua"
],
"text": [
"They're called library files because they contain resources for programs to work. They are accessible by multiple programs to share the data, but only when needed so it saves on memory. Each library would have a specific functionality though, so that's wh... | [
"url"
] | [
"url"
] | |
m3z78o | How does the internet work? | Pretty sure I’m still going on Ted Stevens’ “series of tubes” metaphor. | Technology | explainlikeimfive | {
"a_id": [
"gqrxkun",
"gqrt97n"
],
"text": [
"A good analogy to understand the internet is by comparing it to mailing letters. You send a letter to a place requesting content. Maybe you send a letter to Sears asking for a catalog of all they have on sale. Your letter is delivered by your internet ser... | [
"url"
] | [
"url"
] |
m3zz0o | What does it mean for ETH to be more like "gas" than an actual currency? | Technology | explainlikeimfive | {
"a_id": [
"gqs4aal"
],
"text": [
"In short, it allows it to do, rather than to have. In analogy: gasoline can get you to the other side of the continent, money can't get you anywhere, unless you spend it to let someone else get you to the other side of the continent. The Ethereum network allows addresse... | [
"url"
] | [
"url"
] | |
m41l18 | Why do smaller rechargeable batteries (smartphones, power banks) use mAh to measure capacity, while larger batteries (laptops, EVs) use kWh? | How come some use Watt-Hours and some use Ampere-Hours? | Technology | explainlikeimfive | {
"a_id": [
"gqsbatm"
],
"text": [
"When you are comparing batteries of equal voltage, using Ah or Wh are basically the same because you can just multiply by voltage. For example standard car batteries are 12V and their capacity is quoted in Ah. Why not Wh, which would work equally well? The things that a... | [
"url"
] | [
"url"
] |
m445uh | why do batteries charge quicker when they’re empty. | I’ve noticed that my phone will charge really quickly up to 50%ish and then the speed it charges to 100% is much slower. I’ve found this true for other devices too, why do batteries charge quicker when they’re empty and then the speed slows down to get it to 100%? | Technology | explainlikeimfive | {
"a_id": [
"gqsjlhc",
"gqsh6zn"
],
"text": [
"Think of pouring water into a mug. When it's empty, you can pour quickly. But unless you want spilling boiling water all over, you have to slow down when it's getting full. Overcharging batteries, especially the lithium kind is bad. It damages the battery... | [
"url"
] | [
"url"
] |
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