q_id stringlengths 6 6 | title stringlengths 4 294 | selftext stringlengths 0 2.48k | category stringclasses 1
value | subreddit stringclasses 1
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7lz8g1 | How do places like call centers have outgoing calls with the same identity (one phone #), but at home if someone is using the line we can't make calls? | Technology | explainlikeimfive | {
"a_id": [
"drq6sy3"
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"text": [
"It’s just a simple trick performed by call center software. The outgoing phones are all assigned a single identity that masks the actual number to display on the recipient’s caller ID. This is similar to how companies can use one mass email system to send millions of em... | [
"url"
] | [
"url"
] | |
7m11m7 | How can a smartphone camera, with such a small lens, detect different levels of depth to apply a portrait effect? | Technology | explainlikeimfive | {
"a_id": [
"drql3ge",
"drqlgzl"
],
"text": [
"1 - The device identifies what is in the first plane (using the parallax effect of dual lenses/sensors, similar effect with dual pixel sensors, or AI with single lens/single sensor) 2 - Whatever is not in the \"first plane mask\" is blurred by software af... | [
"url"
] | [
"url"
] | |
7m1uru | How can Tesla's Grid battery solution can make sense when it can power 30k homes for only one hour? (South Australia) | Technology | explainlikeimfive | {
"a_id": [
"drqpd9c",
"drqpn84"
],
"text": [
"You’re definitely right, the battery system won’t stop a full blackout. Instead its purpose is to help buffer out periods of very high load until the power stations can respond.",
"Batteries in a grid help to smooth out the difference between \"real\"... | [
"url"
] | [
"url"
] | |
7m2ebi | Why don’t airports and air travel companies update from the staticky ATC systems to something that is able to be more clearly heard and understood. | Technology | explainlikeimfive | {
"a_id": [
"drqtqim"
],
"text": [
"Your cellphone also loses signal if it goes into a tunnel. Your cellphone is fm radio, pretty, nice, but weak signal. Plans are on lower frequencies, AM radio. Shittier quality but a much stronger signal strength."
],
"score": [
3
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... | [
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7m4gg2 | Do the IoT devices or sensors have to have IP address functionality in their firmwares? Or do they have to use the Internet Protocol Suite? | Technology | explainlikeimfive | {
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"text": [
"If they are using IP (e.g. TCP/IP or UDP) then yes they need their own IP address. They have the IP address handling and the network stack in their fi... | [
"url"
] | [
"url"
] | |
7m4s1a | what will happen if I put a new battery alongside an almost dead battery in a toy or remote? | Technology | explainlikeimfive | {
"a_id": [
"drrfsvs",
"drrgoox",
"drrht54",
"drrgpzz"
],
"text": [
"It depends on the toy. If they are in parallel (both plus sides connected to each other, both minus sides connected to each other) you rapidly charge (or try to charge) the old one while rapidly discharging the new one. In th... | [
"url"
] | [
"url"
] | |
7m55vt | What are undersea cables? What is their purpose, how were they built, and what would happen if they were cut? | Technology | explainlikeimfive | {
"a_id": [
"drrfzwm"
],
"text": [
"> What are undersea cables? Thick cables that are under the ocean, exactly what their name suggests. > What is their purpose? We're using one right now to communicate over the internet assuming you aren't in the US. They provide the communication connections across the ... | [
"url"
] | [
"url"
] | |
7m57ks | Difference between LED, AMOLED, LCD, and Retina Display? | Technology | explainlikeimfive | {
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"text": [
"So these are terms that refer to some fundamentally different things. I'll throw a few oth... | [
"url"
] | [
"url"
] | |
7m8pbh | can someone explain how and why analogue is different than digital in context of computer processing power? | Technology | explainlikeimfive | {
"a_id": [
"drs5xxx",
"drs61is",
"drs4ra7"
],
"text": [
"Analog-- I want to tell you the number 82. So I shine a light towards you at 82% brightness. You observe the brightness and write down what you see. Digital-- I want to tell you the number 82. So I blink a light on-and-off 8 times, wait a s... | [
"url"
] | [
"url"
] | |
7maeok | Why do you hear a little bit of static in headphones whenever you plug them into a device or unplug them? | Technology | explainlikeimfive | {
"a_id": [
"drsierk"
],
"text": [
"Headphone jacks have circular conductors the length of the jack. As you insert it they rub against parts of the socket meant for the circles higher up. They thus get a slight amount of power unintentionally that creates a bit of noise."
],
"score": [
9
],
"t... | [
"url"
] | [
"url"
] | |
7mat0f | How do the anti-theft systems at store exits/entrances work? | Technology | explainlikeimfive | {
"a_id": [
"drszln7"
],
"text": [
"There are little tags inside the devices that emit a reply radio signal when they’re subjected to another, higher power radio signal on the correct frequency. If you shoplift an item, this tag is still active and the sensors you walk through can detect it. When you chec... | [
"url"
] | [
"url"
] | |
7mbmu4 | how does fast charging work | Technology | explainlikeimfive | {
"a_id": [
"drsric1"
],
"text": [
"Fast charging works by providing a different voltage or having a lot of current available. It requires a special charger that can work with the phone. The phone and the charger negotiate what type of power will be used Phones still support the standard 5V 500mA charging... | [
"url"
] | [
"url"
] | |
7mbutz | Why does shining a blue laser at an LED turn it on? | Technology | explainlikeimfive | {
"a_id": [
"drstke4"
],
"text": [
"I'm assuming it was a white LED. They work by shining a blue LED at a phosphor which causes it to emit a mix of red and green light. Together with some of the blue, they mix to make white. Any blue light shining on the phosphor will make it glow to some extent. The blue... | [
"url"
] | [
"url"
] | |
7mciaw | If amber lensed computer glasses reflect the blue light, why aren't they blue? | The way I was taught how light works in school is that an object absorbs all color that it doesn't reflect. IE an apple absorbs all light except red, which it reflects, therefore the apple is red. If amber lensed computer glasses (like these ones [here] ( URL_0 )) are supposed to deflect the blue light why aren't they ... | Technology | explainlikeimfive | {
"a_id": [
"drt04ar",
"drszpa4"
],
"text": [
"They're not reflecting the blue light, they're absorbing it. And all other colours except amber. So amber is what you see coming through them as well as bouncing off them. When light is absorbed it is used to vibrate the molecules that make up the glass. ... | [
"url"
] | [
"url"
] |
7md2nc | What is the thing about hyper loops that keep them from actually being a reality | Technology | explainlikeimfive | {
"a_id": [
"drt2qsd",
"drt2o2k"
],
"text": [
"> What is the thing about hyper loops that keep them from actually being a reality The whole not existing thing is what it really comes down to. We don't have extensive tubes of near vacuum running across the country to desired destinations. We don't have... | [
"url"
] | [
"url"
] | |
7md4a8 | Why we still use towers to broadcast signals (radio,cell phone, etc). Why not small antennas that could be built anywhere with wires buried in the ground. | Technology | explainlikeimfive | {
"a_id": [
"drt2txv",
"drt2y6r"
],
"text": [
"Cost. It's cheaper to build a smaller number of antennas in locations that allow sharing -- this usually means putting them high up so their signals can get past obstacles. One phone antenna tower may serve users across up to 100 square kilometres. (Typic... | [
"url"
] | [
"url"
] | |
7mdkuh | How does a computer recover corrupted data? | Technology | explainlikeimfive | {
"a_id": [
"drt7lol"
],
"text": [
"Tolerances, error detection and error correction. Tolerance: In TTL logic if the voltage on a data line is between 2V and 5V that's a logical 1, and between 0V and 0.8V is a logical 0. This means that the hardware can take a bit of variation and it makes no difference. ... | [
"url"
] | [
"url"
] | |
7mdyve | Why do airplanes have double-pronged audio jacks? | Technology | explainlikeimfive | {
"a_id": [
"drtbtwz"
],
"text": [
"I suspect there's also the opportunity to make you use, and charge you for, their headset instead of your own."
],
"score": [
3
],
"text_urls": [
[]
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} | [
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7mebn8 | How do electronics that rotate stay connected? | For example, a PTZ (Pan Tilt Zoom) camera can keep rotating indefinitely, yet it's always connected for video and power. If the rotating component of the camera was connected to the static part with wires, it would just twist and break, so how does the camera transmit images and use electricity? | Technology | explainlikeimfive | {
"a_id": [
"drtb6zr",
"drtj8p0"
],
"text": [
"As a basic example, imagine a headphone jack plug in its socket. The jack plug is split into 2 or 3 segments which carry different signals, the socket has 3 contacts inside it which always touch these segments on the jack plug, and you can rotate it as mu... | [
"url"
] | [
"url"
] |
7mecd4 | How did google aquire the 8.8.8.8(google's dns server) ip adress? | Technology | explainlikeimfive | {
"a_id": [
"drtaqbo"
],
"text": [
"If you do a Whois lookup (Whois IP 8.8.8.8). Level 3 Communications, Inc. owns the Class A Subnet 8.0.0.0 And Google is listed for the Class C Subnet 8.8.8.0 My guess is Google leased that Class C from Level 3 Comm. and decided to use it for their DNS server to make it ... | [
"url"
] | [
"url"
] | |
7mhsiy | Why does a good pair of headphones/earphones make it feel like the sound is coming from inside the middle of your head? | Edit: RIP Inbox... I knew thee well... Edit 2: Front Page! Wow! | Technology | explainlikeimfive | {
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],
"text": [
"To put it simply, whenever a sound comes out of both the left and right channels at an equal volume, your brain will oft... | [
"url"
] | [
"url"
] |
7mj1d0 | what is the difference between the cheap batteries that come in toys and major brand batteries, like Duracell, and why does the latter last a lot longer? | Technology | explainlikeimfive | {
"a_id": [
"drubw3y",
"druar6f"
],
"text": [
"Usually toys come with an \"extra heavy duty\" battery which is a generic name for [zinc-chloride]( URL_2 ). These batteries are really bad. An AA might hold 1.5 watt-hours of power. Some really cheap toys come with \"heavy duty\" batteries or zinc-carbon... | [
"url"
] | [
"url"
] | |
7mjaib | How come touch screens only work when they come in contact with skin and not other things? | Technology | explainlikeimfive | {
"a_id": [
"drudb04",
"drupsvr"
],
"text": [
"Most touch screen sense the increase in capacitance when something conductive gets very close to the screen. Metal or conductive rubber can also affect touch screens. Edit: Capacitance is a property of capacitors. Capacitors are made of two conductors sep... | [
"url"
] | [
"url"
] | |
7mjyr9 | why does Netflix (and other videos) get stuck at “99%” buffering? Shouldn’t the percentage accuracy display the time left? | To add on: it will steadily increase from 0-99 at a fairly constant rate, but stay stuck at 99 for like 25s. This is inaccurate, but why does this happen? Why is the algorithm not able to incorporate that wait time and distribute it across the buffer timer, so that once it hits 99 it doesn’t wait, but instead the video... | Technology | explainlikeimfive | {
"a_id": [
"drukphq",
"drujlly",
"drv51m2"
],
"text": [
"\"loading screens\" are notorious for their prime purpose is to placate the user that something is happening, and not for being accurate or honest. Unless the people who coded Netflix's loading % function come in here and tell us how it wor... | [
"url"
] | [
"url"
] |
7mmqrm | When did WASD become the standard for movement control in games and how did it become so widespread across all games? | Technology | explainlikeimfive | {
"a_id": [
"drv1wqd",
"drv1zmv",
"drv2pww",
"drv23fh"
],
"text": [
"It was some dude that played Quake. I'll see if I can find an official source, but some people had been using WASD but this guy was the first famous player to do so. [Source]( URL_0 )",
"it evolved from the very first fir... | [
"url"
] | [
"url"
] | |
7mn403 | Why do USB cables have a max length? | title | Technology | explainlikeimfive | {
"a_id": [
"drv5l36",
"drv4arr",
"drv6t5x",
"drv5f06",
"drxbljj"
],
"text": [
"When designing a protocol like USB, there are some parameters that need to be set. Depending on how you want to handle collisions, acknowledgements, retransmissions, ... you have to choose different parameters,... | [
"url"
] | [
"url"
] |
7mpc12 | How does GPU/CPU bottleneck work? | First of all, I’m truly sorry if this has been asked here before, im new here on reddit and i couldn’t find an answer. So, what is exactly that “phenomenon”? What makes it happen? I’ve heard a lot about it and I’ve seen explanations for it but I truly need an ELI5 for this one. Thank you all in advance and sorry for an... | Technology | explainlikeimfive | {
"a_id": [
"drvmyc6",
"drvrqix",
"drvmyp1"
],
"text": [
"A \"bottleneck\" in a system occurs when a single part of the system limits the performance of the whole system. Every system has a bottleneck or critical step, the goal is to make sure its as well balanced as possible so you don't lose too... | [
"url"
] | [
"url"
] |
7mwgpu | Do video games give you any real life skills? | Technology | explainlikeimfive | {
"a_id": [
"drx62tl",
"drx68w1"
],
"text": [
"It depends on the video game, but yes they have been shown to have benefits such as.... - Increased hand-eye coordination. - Increased reaction times. - Increased focus/concentration and memory ability. Some have educational value (such as typing games an... | [
"url"
] | [
"url"
] | |
7mwp6n | Why does removing batteries, and then reinstalling them make the device work for a small period of time? | Technology | explainlikeimfive | {
"a_id": [
"drx8f42"
],
"text": [
"Circuits are designed to shut off with batteries below a certain voltage. When it detects an excessively low battery voltage it turns itself off. That circuit stays in the \"off\" state until voltage is completely removed from the circuit. That circuit also has a range.... | [
"url"
] | [
"url"
] | |
7mx2a8 | How can companies come out with very similar products(Google home, Amazon alexa) without infringing on each others patent? | Technology | explainlikeimfive | {
"a_id": [
"drxbznn"
],
"text": [
"Patents must describe, in detail, a very specific technological improvement. They don't just cover the general idea of a product. A computer talking to you has been around for years. A computer understanding speech has been around for years. A computer following instruc... | [
"url"
] | [
"url"
] | |
7mxbgp | What is the benefit of a strong password? | Technology | explainlikeimfive | {
"a_id": [
"drxdian"
],
"text": [
"When the server gets breached and the database gets downloaded, the attackers now have unlimited attempts to brute force the passwords within that database. If your password is weak then it will be one of the first to fall, potentially before you're notified of the brea... | [
"url"
] | [
"url"
] | |
7n0v8i | How does a finger print sensor work? | Technology | explainlikeimfive | {
"a_id": [
"dry7l20"
],
"text": [
"When you take a close look at your fingers, you’ll notice that there are very small ridges on them. Everyone has a slight difference between the heights of these ridges, the distances between them, and all the empty spaces or unique points of these ridges. When you use ... | [
"url"
] | [
"url"
] | |
7n3800 | Why do you have to eject a thumb drive before removing it from your computer? How does not ejecting damage your computer? | Technology | explainlikeimfive | {
"a_id": [
"dryoc2e",
"dryo2bg",
"drynzu3",
"dryo3lq",
"dryo01w"
],
"text": [
"Imagine someone is writing on a piece of paper. By asking the computer to remove the drive you are letting that person finish their sentence and the writing makes sense to the next person reading it. By yanking... | [
"url"
] | [
"url"
] | |
7n4d9y | How can forensics tie a bullet to a specific firearm? | Can forensics tie a bullet to a specific gun? like a 9mm bullet from glock 19 #1234. Can forensic science actually do that or is it hollywood bs? | Technology | explainlikeimfive | {
"a_id": [
"drz5yj0",
"dryxbsm",
"drzwcgj",
"drzd04t"
],
"text": [
"It's Hollywood BS. A comparison to a ballistic forensics database has never yielded a positive match (Maryland has maintained one for years and gotten no tangible benefit from it). A US National Research Council Study conclud... | [
"url"
] | [
"url"
] |
7n4nn8 | How is the Criterion Collection able to restore movies that are 50 plus years old to Blu Ray quality? | Technology | explainlikeimfive | {
"a_id": [
"drz07pu",
"drz0l00"
],
"text": [
"35mm film still has more detail contained on it than any digital camera can capture. It captures far more texture and nuance, this is why some directors (Tarantino being a popular example) still use \"real\" film. This is comparable to the old records vs.... | [
"url"
] | [
"url"
] | |
7n5nq2 | How does radar work? And why can you only pick up objects on radar if they are above a certain latitude? | Technology | explainlikeimfive | {
"a_id": [
"drz87fz",
"drzkwhr"
],
"text": [
"Radar is just just radio waves that get sent out, bounce of an object, and return to the receiver. Radar can detect objects at any altitude as long as there's nothing in the way. So for example, radar can't detect something on the opposite side of a mount... | [
"url"
] | [
"url"
] | |
7n6cld | How does an audio equalizer actually WORK? (Not how do I use one) | I already know how to use an equalizer either on a mixing console, or a parametric EQ in a DAW. But from an engineering perspective, how does an EQ actually work? If I wanted to build one, what's the general concepts I would have to know in order to build one? How does an equalizer actually differentiate the frequency ... | Technology | explainlikeimfive | {
"a_id": [
"drzsuz3"
],
"text": [
"It is all just [filtering]( URL_0 . By careful selection and placement of time-based elements in your circuit like capacities and inductors, you can filter out frequencies. In essence you can think that a capacitor takes a certain amount of time to charge. When fully ch... | [
"url"
] | [
"url"
] |
7n9glm | what's the difference between controlling the volume on the PC and controlling the volume on its speakers? | Is there a difference if I have the volume set at 1 on the audio source (PC) and at 100 on the audio output device (in this case, the speakers), and vice versa? | Technology | explainlikeimfive | {
"a_id": [
"ds02iw4"
],
"text": [
"The difference is the signal to noise ratio you end up with. Keeping the PC volume low and then cranking up the speaker is like recording someone speaking softly outside and then amplifying it: all the background noise gets amplified too. Keeping the PC volume high and ... | [
"url"
] | [
"url"
] |
7n9ogj | How is "realistic" water rendered so smoothly in realtime | I'm talking mostly about videogames, but the question applies beyond them. It seems like rendering water and fluid physics in realtime would be a very intensive task, especially when it must interact with other objects seamlessly. At the very least, there are an enormous amount of polygons in play. How is it rendered s... | Technology | explainlikeimfive | {
"a_id": [
"ds07lvj"
],
"text": [
"Currently, water is not modelled as a fully interactive fluid simulation. The fluid simulations you'd see if you searched for them on YouTube are small simulations rendered for a long time in something like blender. They're not rendered in real time. Water in a video ga... | [
"url"
] | [
"url"
] |
7nai1x | How do email spam filters work? | Technology | explainlikeimfive | {
"a_id": [
"ds0a56o",
"ds0ghbt"
],
"text": [
"I’m by no means an expert and hope this will tide you over until someone more qualified arrives. I believe it’s a sort of artificial narrow intelligence, that is created with a set of known spam senders, a blacklist if you will. The AI then learns from yo... | [
"url"
] | [
"url"
] | |
5rd8i0 | How is YouTube a sustainable business model? If view count remains constant but video storage costs continue to increase, wouldn't this lead to a permanent loss? | Let's assume that in 2020, YouTube maintains a daily view count of 500 million per day. However, they also keep old videos on the site that aren't generating views. Don't these "dead videos" eventually accumulate and overcome the profit margins with cost of storage? | Technology | explainlikeimfive | {
"a_id": [
"dd6cep0",
"dd6d2sp"
],
"text": [
"Storage costs are going down exponentially. Every year the cost of storing 1 GB of data is half what it was the previous year. YouTube loses money every time someone uploads a long video that nobody watches, but it doesn't matter because they make insanel... | [
"url"
] | [
"url"
] |
5re0bo | Who, or what, finds and puts together the information on sites such as URL_1 and URL_0 ? | Technology | explainlikeimfive | {
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"dd6o3qv",
"dd6px3y",
"dd6k4kd",
"dd6ru6j",
"dd6qk1g",
"dd6qpwh",
"dd6sarl",
"dd7467u",
"dd6s01j",
"dd6wfku",
"dd6vtws"
],
"text": [
"Short answer: Mormons. Why? Members of the Church of Jesus Christ of Latter Days Saints believe that they can be baptize... | [
"url"
] | [
"url"
] | |
5re3kb | What is the process behind counting TV votes? (As seen in talent shows, etc) | Technology | explainlikeimfive | {
"a_id": [
"dd6jj1u"
],
"text": [
"Normally you phone into a number which will play an automated message before ending the call. From the production side of things they can see the number of calls to each number. This is a pretty standard part of telephony technology and is used in virtually every call c... | [
"url"
] | [
"url"
] | |
5re890 | Georeferenced Images | What does georeferencing really mean? How is it done? Recording latitude / longitude data when the images are captured? Is the latitude / longitude / altitude data always stored in EXIF? Or are there other possible formats? | Technology | explainlikeimfive | {
"a_id": [
"dd6lbcg"
],
"text": [
"If you have pictures from your last vacation, it could be nice to know where they were taken, couldn't it? So, the camera - if it has an GPS - can record where the pictures was taken and store it together with the image. Such as in the EXIF header. This is sometimes cal... | [
"url"
] | [
"url"
] |
5rgnh8 | If games can now render almost perfect textures, why it is yet so difficult to have a nice looking shadow? | Technology | explainlikeimfive | {
"a_id": [
"dd7242o"
],
"text": [
"Shadows require redrawing the scene from the perspective of the light source to determine what is on top of what relative to that light source. When this redrawing happens the results get stored in a texture called a shadow map. This shadow map has a fixed resolution wh... | [
"url"
] | [
"url"
] | |
5riov4 | How can a internet web address be bought and sold? Who are you paying when you buy one? | For example, I can't just create a website that uses the domain address of URL_0 . Reddit owns that address and pays for it - so who are they paying? How did the person they're paying obtain it in the first place? | Technology | explainlikeimfive | {
"a_id": [
"dd7k3ql"
],
"text": [
"There's a non-profit corporation, ICANN, that runs the global Domain Name Service. You can think of it like a phone book for the Internet- it maps names (like URL_0 ) to addresses (like 151.101.1.140). They give control of the top level domains (.com, .org, .uk, and som... | [
"url"
] | [
"url"
] |
5rje32 | Why aren't utility companies more supportive of developing alternative energy? | Technology | explainlikeimfive | {
"a_id": [
"dd7tmdd",
"dd7tzox"
],
"text": [
"I work for an electrical utility company as one of their engineers in the project management side. It is true that utility companies are first out there to make money, but it doesnt mean that they arent out to do the right thing either. We have a departme... | [
"url"
] | [
"url"
] | |
5rjth1 | Why credit/debit cards implemented chips | Technology | explainlikeimfive | {
"a_id": [
"dd7tcxt"
],
"text": [
"A swiped card uses a magnetic strip and the information contained on it is static, it stays the same every time, so if that same information is skimmed, it can be used by thieves until the user catches the fraudulent purchases. A chip, however is part of a process calle... | [
"url"
] | [
"url"
] | |
5rkleh | Why hasn't anyone made a gaming console the way 6-CD changers were made, having multiple discs in the console at the same time? | Technology | explainlikeimfive | {
"a_id": [
"dd7zx45"
],
"text": [
"cost, reliability, size. But probably mostly just not a necessity. CD changers would shuffle songs that lasted 4 minutes. Its reasonable to expect gamers to swap the disk between games since they are likely to play much longer."
],
"score": [
6
],
"text_urls... | [
"url"
] | [
"url"
] | |
5rpup7 | Why hasn't commercial supersonic flight been attempted on a wide-scale since concorde? | Surely in 14 years since the last commercial Concorde flight the technology would have advanced to the point we could think about this again? | Technology | explainlikeimfive | {
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"text": [
"The main issue is it just isn't worth it. It cost about as much to fly the Concorde across the Atlantic as it does 747, which has three times as many ... | [
"url"
] | [
"url"
] |
5rqoie | Why is it when you watch a DVD or stream a movie on your tv, it isn't completely full screen? | If I watch a movie on Netflix the movies take up my entire TV. But if I watch a DVD or stream a movie there are black bars on the top and bottom of my tv. Why? | Technology | explainlikeimfive | {
"a_id": [
"dd9dd3f",
"dd9dg1s"
],
"text": [
"Because that movie was formatted for a resolution different from your TV. For example, if it was more widescreen than your TV then it would either have the sides cut off (which means you miss seeing anything happening at the sides of the screen) or they f... | [
"url"
] | [
"url"
] |
5rrnta | HTTP vs. HTTPS | Technology | explainlikeimfive | {
"a_id": [
"dd9lrdh",
"dd9qg70",
"dd9uzw4"
],
"text": [
"The \"s\" means secure. Think about talking to your BFF in a room full of people at a party. Everyone can hear you and hear what you're talking about. Now lets change that up, now you and your BFF are speaking a secret language that just th... | [
"url"
] | [
"url"
] | |
5rrznp | What is a Jewellers tool more like, a 'Magnifying glass' or a 'mini telescope'? Please Help. | To settle a petty argument. A stubborn friend just ignores any logical answer I give. | Technology | explainlikeimfive | {
"a_id": [
"dd9oopa",
"dd9opab",
"dd9owsl"
],
"text": [
"It's called a [Jeweler's Loupe]( URL_0 ), and it does NOT telescope, so it is a magnifying glass.",
"Microscopes (and by extension, magnifying glasses which are more primitive microscopes) are used to magnify small objects that are at a... | [
"url"
] | [
"url"
] |
5rs5g8 | Why are people allowed to reupload YouTube videos onto Facebook without it being considered copyright infringement? | Many content creators make their livings on YouTube. But I see thousands of videos taken and reuploaded onto Facebook. Sometimes these are just small clips but sometimes they are the full videos, and almost never is the original creator mentioned. Is there a copyright strike system YouTube content creators can use on F... | Technology | explainlikeimfive | {
"a_id": [
"dd9szh7",
"dd9vodq"
],
"text": [
"If the content creators found their videos on Facebook, they could file a DMCA claim that would force Facebook to take the videos down. Google/YouTube legally can't do anything because they don't own the copyright to the videos, and it's near impossible t... | [
"url"
] | [
"url"
] |
5rsl98 | Why do photographers not just take video in HD or 4K then take screenshots afterwards from the footage? | Technology | explainlikeimfive | {
"a_id": [
"dd9ttxl",
"dd9tqtx",
"dd9u46m",
"dd9ueou"
],
"text": [
"So a couple things. First of all, most cameras already support a burst mode, which is basically what you want- it takes a whole bunch of pictures in a row and then you can choose from that. Second, full HD video is only 2 meg... | [
"url"
] | [
"url"
] | |
5rtgat | What does 'cdn' in a url mean? | Technology | explainlikeimfive | {
"a_id": [
"dd9ynci"
],
"text": [
"CDN stands for Content Delivery Network. If a web site have a lot of images and videos they might go to a provider that have better infrastructure to deliver the content to the client. As they often have some dynamic elements and some static elements they need a separat... | [
"url"
] | [
"url"
] | |
5rtnp9 | How do different resolutions work? | Like, say you have a 1920x1080 pixels monitor. You play a 1920x1080p youtube video. All is well. Now you want to set it to a lower resolution. The way I can think of to do that, is to take four pixels in a square and take the average colour and brightness of that pixel and make that the same for all four. Now you've de... | Technology | explainlikeimfive | {
"a_id": [
"dda014n",
"dda6sfy"
],
"text": [
"Imagine a grid of ~2M cells, going 1920 across and 1080 down. Now, make a grid of ~1M cells, going 1280 across and 720 down. Then, stretch the second grid uniformly until it's the same size as the first grid. For whatever cells overlap, you take the avera... | [
"url"
] | [
"url"
] |
5rtwd3 | Why does hosting a server require changing firewall & router settings, but connecting to a server doesn't? | Technology | explainlikeimfive | {
"a_id": [
"dda1us9",
"dda7bxv"
],
"text": [
"When you host a server you're allowing people to make requests to your computer and have access to your network, firewall and routers block some ports so malicious people can't access your network or connected devices, by hosting a server you must willing... | [
"url"
] | [
"url"
] | |
5rukfk | If I run an internet speed test and it tells me I have a download speed of ~60mb/s but when I actually download something, it's around 5mb/s | Technology | explainlikeimfive | {
"a_id": [
"dda75nn",
"dda7his",
"dda7bjj",
"dda74wp"
],
"text": [
"I think you're confusing different units. Your download speed is almost definitely 60Mbps (MegaBITS per second). This translates to 7.5MBps (MegaBYTES per second). This makes for much less of a difference. In addition, whatev... | [
"url"
] | [
"url"
] | |
5rur4k | Why cant we take good pictures of lunar landing sites from earth or from satellites? | We can "see" really far in space with terrestrial telescopes, and with technologies like the Hubble space telescope we can see even further but a few good pictures of landing sites would put to rest a few conspiracy theories. | Technology | explainlikeimfive | {
"a_id": [
"dda8on5",
"dda8ode"
],
"text": [
"[You can]( URL_0 ). But of course if you don't believe that it happened, it's pretty easy to shut your brain off regarding proof. The best question I've found is - When the US went to the moon, we did so racing against the USSR for the \"first\". If there... | [
"url"
] | [
"url"
] |
5rvjep | How come when the batteries in a remote control die, if you switch those two batteries around, the remote starts to work again? | So, say that you have two AA batteries in the remote and they're completely dead and the remote won't work at all. Then you take the back off and use those same batteries but just switch which one was + and which one was - the remote will start to work again. Why is this? | Technology | explainlikeimfive | {
"a_id": [
"ddag3ks"
],
"text": [
"Because sometimes it's not that the batteries are completely dead, it's that dirt and corrosion have made the electrical contacts stop being as conductive as they should be. When you move the batteries, it removes the dirt and oxidation, exposing conductive metal."
],... | [
"url"
] | [
"url"
] |
5rvtv6 | Why are computer CPUs so small? Wouldn't it be beneficial to make them bigger? | Technology | explainlikeimfive | {
"a_id": [
"ddaim4q",
"ddal41n",
"ddao4nn"
],
"text": [
"Electricity takes time to travel through wires. If you want to make a signal go to a bunch of different points quickly then you need to put those points closer together. This is what CPU designers are doing; by making their components small... | [
"url"
] | [
"url"
] | |
5rw7yt | How do electronic pH sensors work? | This is pretty much what I wonder about every kind of sensor - electronic scales, cameras, etc. - but the one I especially don't get is an electronic pH probe. What exactly is it that "senses" the H+ ions present in a solution, differentiates from any other kind of dissolved cation, and translates the intensity of the ... | Technology | explainlikeimfive | {
"a_id": [
"ddanz1j"
],
"text": [
"An electric pH meter is essentially just a voltmeter. An acid solution is essentially half of a battery, so the pH meter brings the rest of the battery along and measures the potential difference between the two leads on the probe. Once you've determined the voltage of ... | [
"url"
] | [
"url"
] |
5rw99f | How does seeding for a download decrease my download time? | When the original piratebay was still up a couple of years ago, I remember some downloads for whole seasons of tv shows only taking around 30 min because of the ridiculous high amount of seeders. When someone seeds, what is it actually doing? | Technology | explainlikeimfive | {
"a_id": [
"ddalzs2",
"ddam05g"
],
"text": [
"A \"seed\" is an uploaded that has the entire file to provide. A leecher is a downloaded who has less than the entire file to provide. If there are more seeders it ensures that whatever piece you are looking for someone can provide it.",
"Most compute... | [
"url"
] | [
"url"
] |
5ry07m | How does an Oreo package reseal itself without being sticky? | Edit: I can't believe how many up votes this got! I was just a bit stoned on my couch eating these fuckers. Next thing you know I'm tits deep in answers and up votes. Thank you!! | Technology | explainlikeimfive | {
"a_id": [
"ddba5e3",
"ddbea2p",
"ddbkt9r",
"ddbjm27",
"ddcavbb"
],
"text": [
"In medical devices they coat the surface being stuck to in low adhesion material like a thin silicone. This allows for some stick without allowing for a complete adhesion. Like the Post-it note, they use a powe... | [
"url"
] | [
"url"
] |
5rz49v | How does my toaster lever only stay down when its plugged in to power? | Technology | explainlikeimfive | {
"a_id": [
"ddbeh89"
],
"text": [
"There is a small electromagnet in there, which moves a catch which holds your toaster lever down. When it's not plugged in there is no electricity, so the electromagnet is not a magnet, so the catch doesn't move and your lever won't stay depressed."
],
"score": [
... | [
"url"
] | [
"url"
] | |
5s15hi | Why are Captcha's getting more difficult? | Captcha's used to be typing in a word or number, now whenever I sign up to something I have to click on a few pictures. For instance, it will say 'Click on all the houses'. So you click on them, and them pictures are replaced with other pictures, some of them trees, some of them houses and some of them buildings that a... | Technology | explainlikeimfive | {
"a_id": [
"ddbn05d",
"ddbquss"
],
"text": [
"Because robots are getting smarter and smarter so every generation of capatcha becomes useless. The sign thing is just because capatchas developers are so lazy they can't be bothered making it regional",
"Usually you only have to actually do that \"se... | [
"url"
] | [
"url"
] |
5s1ety | How come when you download something it starts slow then gets faster over a few seconds? | What makes it so that the download can't be fast instantly? | Technology | explainlikeimfive | {
"a_id": [
"ddbqrif",
"ddbty7b"
],
"text": [
"Neither you nor the computer you're downloading from know how fast the network between you is ahead of time. If the sending computer just guesses it can potentially flood the network with messages it has no way to deliver and cause network congestion.[ So... | [
"url"
] | [
"url"
] |
5s31wc | Why can't any of my electronics use multiple channels/sources (e.g. wifi & 4g) to download data at the same time? | I get that if I connect my laptop to an ethernet cable, I will still have to deal with a bottleneck at my modem/router/subscription, but what limits (my) computer/phone to only one channel/source? | Technology | explainlikeimfive | {
"a_id": [
"ddc1m8j",
"ddc2zvo"
],
"text": [
"Nothing (well, other than your data plan). My Galaxy S5 has a \"download booster\" option which uses 4G and wifi at the same time.",
"There is a way, but it's pretty recent (the specification was written in 2013- it's [here]( URL_0 ) if you want to ta... | [
"url"
] | [
"url"
] |
5s4uvq | Why do cellphone manufacturers/communication companies recommend that you let a new phone die before recharging it? | Technology | explainlikeimfive | {
"a_id": [
"ddcg711"
],
"text": [
"It should be noted that with Lithium-ion batteries, which is in most smartphones and laptops today, fully discharging them lowers the average lifespan. Small discharges and recharging more often between uses is encouraged in order to increase average lifespan. Fully dis... | [
"url"
] | [
"url"
] | |
5s4wwo | Why are all tv's on sale all of a sudden | I have been somewhat researching televisions and cant help to notice that most tv brands such as samsung and sony have dropped the prices of 4k tvs. Huge price drops too such as 400-500$ off. Isnt 4k suppose to be the new standard of televisions? Is this not the right time to buy a tv? I have not seen anything about 5k... | Technology | explainlikeimfive | {
"a_id": [
"ddcdk5n",
"ddcdl87",
"ddcdiki"
],
"text": [
"Also, tomorrow is the Super Bowl. That makes it a time where people would want to upgrade what they have. 4K has been around for awhile but hasn't caught on for cable, it's mostly for internet/Netflix stuff. They are wanting to push the OLE... | [
"url"
] | [
"url"
] |
5s5248 | How does shooting lasers (i.e. LASIK) into someone's eyes dramatically improve their vision? | Technology | explainlikeimfive | {
"a_id": [
"ddcet4x",
"ddcm1lt",
"ddceue8",
"ddcf3cz"
],
"text": [
"Same way stabbing someone can save their life if the surgeon does it in just the right place. Those lasers make tiny cuts in your eye's lenses, changing their shape so they focus more sharply.",
"I currently work at an op... | [
"url"
] | [
"url"
] | |
5s5epw | why do online cable streaming services only show a select 4 or 5 commercials? | Technology | explainlikeimfive | {
"a_id": [
"ddcn5qk"
],
"text": [
"Is the ad rate so different than broadcast? I watch a local San Francisco station on-line and they have 4 ads. If I pay for broadcast ad rates why don'tI also get to have my ad showing on-line at the same time?"
],
"score": [
6
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
5s5gfd | Why is automaton suddenly a big deal? Hasn't it already been happening for a long time? What's different now? | Technology | explainlikeimfive | {
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"ddcnedg",
"ddcofxu",
"ddcoq2t",
"ddcizyr",
"ddcr1j8",
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"ddcocdx",
"ddclaff",
"ddcr0fo",
"ddclpet",
"ddcpu0k",
"ddcnhw2",
"ddcmq21",
"ddcofgk",
"ddcm4ea",
"ddcs1hm",
"ddcnta9",
"ddcmfiz",
"d... | [
"url"
] | [
"url"
] | |
5s64tr | Why is seawater so hard to convert into drinkable water? | Technology | explainlikeimfive | {
"a_id": [
"ddcoljv"
],
"text": [
"It's just hard to do it cheaply. A lot of people think that membranes are the way to go because membranes can let water pass but stop other stuff. But you got to push the water through the membrane and that takes pressure which takes energy. But who knows, maybe someone... | [
"url"
] | [
"url"
] | |
5s7vcg | Functional programming vs other types of programming | Technology | explainlikeimfive | {
"a_id": [
"dddkbb4"
],
"text": [
"\"Normal\" (imperative) programming is based on an idea that you tell the computer what to do as a sequence of steps like: read a number add 1 to that number print the number on screen ... Functional programming is based on the idea that a program is an evaluation of a ... | [
"url"
] | [
"url"
] | |
5s89w0 | Why is it so hard to create emulators? Emulators like Citrus are coming along, but the ones for the Wii and PS consoles are still in heavy development. | Technology | explainlikeimfive | {
"a_id": [
"ddd8uws"
],
"text": [
"Operating systems like Windows and Linux are designed to work on a wide variety of hardware, so moving from one CPU or ram set to another is not big deal. Operating systems for static hardware systems like gaming consoles are entirely different; the OS is designed from ... | [
"url"
] | [
"url"
] | |
5s8i03 | How will autonomous cars handle not being able to see the road, ie snow | Technology | explainlikeimfive | {
"a_id": [
"ddd7gn7",
"ddd7tmq",
"ddd7sj9",
"ddd8c1s",
"ddd7ftb"
],
"text": [
"It certainly will be harder for an autonomous car to do this than normal driving. Early autonomous cars will likely have a failsafe mode, where if they can't handle the road conditions, they will pull over and ... | [
"url"
] | [
"url"
] | |
5s8t7h | Why do we still load fonts locally for websites, when bandwidth can support entire video ads? | I don't understand why i can visit a website in this day in age and still have un-displayable characters be a thing, especially considering the bandwidth madness that advertisements go through to track and load on your page. | Technology | explainlikeimfive | {
"a_id": [
"ddd9cm8"
],
"text": [
"The HTML language is designed to save bandwidth as much as possible from the ages when it might be a scarce resources. Fonts are a local resource which are not designed to be updated and removed on the fly by web browsers. The designers of the website should use web-saf... | [
"url"
] | [
"url"
] |
5s9l9p | how does my phone know how much percent of battery I have? | Technology | explainlikeimfive | {
"a_id": [
"dddpv07"
],
"text": [
"Almost all smart phones use two different methods together. The most simple is voltage. Voltage is not a very good indicator of charge in li-ion batteries used in phones because the voltage does not fall at an even rate when you use them. Voltage measurement is used as ... | [
"url"
] | [
"url"
] | |
5saodd | Why is self checkout technology so terrible? | Technology | explainlikeimfive | {
"a_id": [
"dddnj6f",
"dddsyni",
"dddt38g",
"dddkk2f"
],
"text": [
"The creator is still frustrated. Planet money made a podcast about it was informative and relatively funny. Here's a link out of pocket cast to the episode if you wanna check it out. URL_0 You can also go to the npr podcast w... | [
"url"
] | [
"url"
] | |
5sb0q8 | Why is red eyes in pictures not as big of a problem as it used to be? | With more selfies being taken than 10 years ago why do I never see red eyes in pictures anymore? Every photo editor used to come with a red eye fixer, but it doesn't seem as common anymore. | Technology | explainlikeimfive | {
"a_id": [
"dddnsp1",
"dddpsb9"
],
"text": [
"A selfie generally doesn't use a flash. Flash photography, especially from a flash that is positioned directly next to the lens, is still very much a problem for red-eye.",
"Now that most cameras are digital, most pictures aren't taken using a flash. ... | [
"url"
] | [
"url"
] |
5sba32 | How were the lights synchronized in Lady Gaga's halftime show? | Technology | explainlikeimfive | {
"a_id": [
"dddrxj9",
"dddt4ug",
"dddqeog",
"dddqrdr",
"dddtnhv",
"ddds6os",
"dddxw63"
],
"text": [
"The drones use Intel's realsense technology combined with infrared LEDs, allowing the drones to know where each other are and form a sort of wireless mesh network. Once the drones ... | [
"url"
] | [
"url"
] | |
5sbouw | How does the hardware inside pregnancy tests works? | Technology | explainlikeimfive | {
"a_id": [
"dddzjzp"
],
"text": [
"Pregnancy tests use antibodies, protein molecules that react to the presence of particular chemicals. Pregnant women produce a particular hormone called human chorionic gonadotropin (HCG), so antibodies that react to it are mixed with chemicals that change colour when t... | [
"url"
] | [
"url"
] | |
5sc1ua | How does a VPN protect your data on a public network from hackers, if the data still has to go through the modem? | Technology | explainlikeimfive | {
"a_id": [
"dde6lx6",
"dddyo9x"
],
"text": [
"Imagine you're sitting in a magical cafe and want to browse a website. You call him up, and the website sits down at your table. > **You:** Hey, Website! I want to see this image, could you describe it to me? > **Website:** Sure! It's a kitten lying on it... | [
"url"
] | [
"url"
] | |
5scvoe | what can a hacker do with my IP address? | I'm not tech savvy. Someone got butthurt on warframe (ps4) and said they were going to 'grab my IP address'. Scare tactic or threat? | Technology | explainlikeimfive | {
"a_id": [
"dde4tcy",
"dde8w20",
"dde5n6h",
"dde75o7"
],
"text": [
"Generally they can start by scanning your ports to see if theres any vulnerabilities they can exploit. In some cases they can even find your location just from the IP. This can lead to doxxing. If they find a vulnerability th... | [
"url"
] | [
"url"
] |
5sd7qs | What are Active Directory Sites and Services | Technology | explainlikeimfive | {
"a_id": [
"dde7epi"
],
"text": [
"Microsoft Active Directory is a role you can install on Microsoft Windows Servers to help you create a unified rights and login infrastructure across several windows computers and applications. To explain the above a bit more in depth. You have probably a computer at ho... | [
"url"
] | [
"url"
] | |
5semdw | Why does software search for new updates immediately after installing the latest update? | Technology | explainlikeimfive | {
"a_id": [
"ddefkfu"
],
"text": [
"Some times it is not possible to go straight from version A to version C without upgrading to version B first. For example a new firmware might have a new way to do firmware upgrades and the most recent upgrade does not have the ability to be upgraded on hardware runnin... | [
"url"
] | [
"url"
] | |
5semqz | How does the AI in video games convincingly miss? | Technology | explainlikeimfive | {
"a_id": [
"ddefqw8",
"ddehx0p"
],
"text": [
"There's no standardized way of doing it. Generally, the computer calculates the trajectory needed to hit you, then uses the random number generator and slides it's aim to one side that number of degrees. The computer can also intentionally skip over any c... | [
"url"
] | [
"url"
] | |
5ses7x | How do websites on mobile browsers automatically open their respective apps on your phone (and sometimes without requesting permission to do so)? | Technology | explainlikeimfive | {
"a_id": [
"ddegph8",
"ddegunt"
],
"text": [
"Mobile operating systems allow apps to register to URLs that fit certain patterns. For example the YouTube app in Android is registered to open URLs starting with URL_0 , so whenever you click such a URL, the OS will launch that app. In Android, if more t... | [
"url"
] | [
"url"
] | |
5sf2r9 | Why has "the man" been able to take down some torrent sites permanently, but TPB still exists? | Technology | explainlikeimfive | {
"a_id": [
"ddem1zf"
],
"text": [
"Preparation and preservance. You can always start another website, find another way to avoid laws, move to a new country, etc. With kickass I think one of two things happened, or likely a mix of both; - They weren't prepared to have their website seized. Perhaps they di... | [
"url"
] | [
"url"
] | |
5sgfzh | Parallel was faster than serial, why isn't there an UPB - "Universal Parallel Bus"? | The maximum data transfer rate of RS-232 serial is about 115kb/s whereas parallel is about 1.1Mb/s when using ECP. When I discovered Laplink transferred files between computers via parallel much faster than serial, I always used the parallel port to transfer data. So I was wondering, why wasn't UPB invented, and why US... | Technology | explainlikeimfive | {
"a_id": [
"ddevlm8",
"ddf2ckv",
"ddeuw9e",
"ddevsn8",
"ddevh28",
"ddfscbx"
],
"text": [
"It comes down to being able to group that parallel data at very high speeds. Say I'm tossing a ball to you and think of this as a serial bus. Now take seven of your friends and I will get seven o... | [
"url"
] | [
"url"
] |
5sh8e5 | Why is it that when watching a movie at 24 frames per second it seems perfectly normal, but when playing a video game it is almost unbearable? | Technology | explainlikeimfive | {
"a_id": [
"ddf0vm1",
"ddf5par",
"ddf7rwj",
"ddfl48p",
"ddf8xr9",
"ddfuawc",
"ddf1k3t",
"ddf8fdf"
],
"text": [
"Film frames can capture motion blur of fast moving objects, essentially the object is appearing in several places at once. Video games render a series of still image... | [
"url"
] | [
"url"
] | |
5shonw | Why do emojis show up differently on iOS vs Android devices? | Why aren't there universal emojis? | Technology | explainlikeimfive | {
"a_id": [
"ddf4kw3",
"ddf6ceb"
],
"text": [
"Well consider it like a different font type. It still conveys the same information, but it is a separate style.",
"When your phone sends text back and forth, it's encoded as numbers. These are standard, so 33 is !, 65 is A, and 128512 is 😀. All your ... | [
"url"
] | [
"url"
] |
5si4sd | How do headphone splitters no longer "half" volume of headphones? | I just got a passive headphone (3.5mm) splitter to watch movies on an airplane with my girlfriend, so we can each have our own headphones. I was just testing it to make sure it works and noticed that with both headphones plugged in, and it plugged into my iPad, there was no reduction in volume. I tested it by plugging ... | Technology | explainlikeimfive | {
"a_id": [
"ddfc6vb"
],
"text": [
"The movement of a speaker cone depends on the magnetic field in the voice coil, and this in turn depends on the current. So it seems as if dividing the available current equally between two loads should result in half the current and therefore half the volume ability in... | [
"url"
] | [
"url"
] |
5siojz | If electricity travels so fast, why does it take so long to charge a battery? | Technology | explainlikeimfive | {
"a_id": [
"ddff2p1",
"ddfd2lc",
"ddfedh8",
"ddfq9tu"
],
"text": [
"You are thinking of charging a *capacitor,* which simply stores electric charge. It's incredibly fast, but doesn't hold a lot of energy per gram of equipment. By contrast, a *battery* doesn't directly store electricity. Inste... | [
"url"
] | [
"url"
] | |
5siso7 | In the late 70's, how did they manage to only produce less than 200 horsepower out of a 455 cubic inch engine, whereas today's 350 cubic inch engines crank out 500+ HP? | Technology | explainlikeimfive | {
"a_id": [
"ddfeguv",
"ddfgv38"
],
"text": [
"Carburetion vs. computers. Zero electronic controls means that your fuel-to-air ratios are governed by things like floating bowl valves and venturi suction. And design was largely a process of \"build one and we'll try it.\" Today, millisecond accurate fu... | [
"url"
] | [
"url"
] | |
5sj2yb | With advances in camera technology, especially in the phone and handheld market why hasn't webcam quality improved also? | Even with "1080p quality" webcams, its seems the generally quality of webcams seem bad, why hasn't webcam camera tech advanced in the same way as Mobile cameras or Go-Pro's | Technology | explainlikeimfive | {
"a_id": [
"ddfhzle"
],
"text": [
"First, they definitely have. Second, you're probably using either a shitty/cheap webcam, a shitty/cheap laptop, or an ultrathin laptop without space in the lid for a decent camera. Edit: This article from today is an example of innovation in the Industry: URL_0"
],
... | [
"url"
] | [
"url"
] |
5slhog | What is the difference between a "drone" and a something like a remote controlled vehicle? | Technology | explainlikeimfive | {
"a_id": [
"ddfxxho",
"ddg5u5q"
],
"text": [
"\"drone\" is just a scary new buzzword for something that's existed for decades. it was first applied to military UAVs (unmanned aerial vehicles) and then applied to consumer toys because the media will do anything to drum up fear-views",
"In short, t... | [
"url"
] | [
"url"
] | |
5smf9u | How come a CD can some times play perfectly, even though it's scratched like crazy? | Technology | explainlikeimfive | {
"a_id": [
"ddga4c7",
"ddg7zav",
"ddgc6k3"
],
"text": [
"CDs contain what's called \"error correction\". Think of the music as being a string of numbers. These numbers are basically the values of a line graph, which is just the shape of the sound waveform that gets played back. So the first point... | [
"url"
] | [
"url"
] |
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