q_id stringlengths 6 6 | title stringlengths 4 294 | selftext stringlengths 0 2.48k | category stringclasses 1
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6hzaej | Why videos don't load continuously, smooth way and load in small 'jumps' | Technology | explainlikeimfive | {
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"Imagine you're at a buffet selling only m & ms (in this case, bandwidth) with only one guy handing the candy out to people. some people will go up to the man with an empty bucket and ask for m & ms, instead of filling everyon... | [
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6hzffp | What is a botnet? | Technology | explainlikeimfive | {
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"text": [
"A botnet (or robot network as the name implies) is essentially a network of slave client computers all connected for the purpose of malicious use (Distributed Denial of Service Attacks, monitoring and stealing network traffic, etc.). One computer, the master, controls a... | [
"url"
] | [
"url"
] | |
6hzsw9 | How do internet speed tests work? | When using an internet speed test, am I just downloading as much data from their servers as possible? Will this use a lot of data on my mobile plan? | Technology | explainlikeimfive | {
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"text": [
"Sort of. In short, speed tests are conducted by simply retrieving a file from a server for calculating download speeds and then sending files back to the server for calculating upload speeds. Usually this is done in a short period of time (such as 2-10s),... | [
"url"
] | [
"url"
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6i03af | why is it with all the technology that we have today that most security footage or CCTV still looks grainy and takes time to ID whoever the perp or vehicle is? | Technology | explainlikeimfive | {
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"text": [
"Storing video in high quality formats takes lots of space and since security footage isn't that important minimizing cost is more important than quality picture. The footage is highly compressed which degrades quality, and of... | [
"url"
] | [
"url"
] | |
6i08vi | Why click bait webpages put everything in a slided format? | What benefit does the web page owner receive from putting their content in 50 different slides that you have to click through versus a scroll-able format? They have to understand it's annoying and at times almost unreadable. So what gives? | Technology | explainlikeimfive | {
"a_id": [
"dj2h0l9",
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"text": [
"Cause every time you click, the ads refresh, which makes them more money. Some ads also pay more to websites with greater engagement. So each click registers as more engagement. They don't care of it's annoying, they only care about money.",
"There ar... | [
"url"
] | [
"url"
] |
6i1bzx | why do you need Edge in Windows 10 to play Netflix in 1080P while 4K YouTube videos are supported by pretty much any browser on Windows 7? | Technology | explainlikeimfive | {
"a_id": [
"dj2qdra"
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"text": [
"It's not a question of capability as much as it is DRM. Edge is the only browser that supports the DRM scheme used by Netflix in order to offer higher-quality content. Other browsers cannot offer that same DRM protection, so content providers do not allow Netflix to str... | [
"url"
] | [
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] | |
6i1waz | How do electronic thermometers work? | I understand thermometers with mercury in them that expand with the heat but how does a car thermometer work? | Technology | explainlikeimfive | {
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"dj2uibi",
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"text": [
"Usually electric thermometers a resistance based. As temperature goes up the resistance decrease (or increases for some materials.). From there you either use an analog gauge to read current or voltage or you push the analog signal through an ADC to get a... | [
"url"
] | [
"url"
] |
6i2ajp | In MMOs, what stops a game from having large scale battles? | The large scale battles in real life never consisted of a mere few thousand people but often hundreds of thousands to millions of people. ATTOTP (at the time of this post) there are 439,688 actively playing ff14. A game like this has enough players to have a large scale battle as seen in history. What in technology sto... | Technology | explainlikeimfive | {
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"text": [
"For starters everyone's pc would have to be capable of rendering that many characters in one spot, as well as register all the actions made by those characters. But I would imagine there would be a lot of stress on the servers having everyone in spot.",
... | [
"url"
] | [
"url"
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6i2jv9 | How do developers of programs like firefox process crash reports? | X-Post from r/askscience. Couldn't grasp the concepts there at this early hour. | Technology | explainlikeimfive | {
"a_id": [
"dj3kpj0"
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"text": [
"See this [Pressention]( URL_0 ) A crash report is basically 4 things: * The exact build tag for the executable you're running, so that the programmer can match all the rest of the information up in their tools. * The specific type of crash (memory access, bad OS call, s... | [
"url"
] | [
"url"
] |
6i309o | How are TV commercials played with correct timing during live television events? | I was just wondering how commercials were played at the correct time during a sporting event, and how everything is coordinated, like the length of the commercials, and also how nothing in the live show gets cut off. | Technology | explainlikeimfive | {
"a_id": [
"dj369z7"
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"text": [
"Producers/directors in the control room have everything timed out. They know exactly when to cut for commercials. It may be live but everything is planned ahead. Also, some live programs usually have a bit of a delay. I used to do graphics for a 24/7 news channel-type, ... | [
"url"
] | [
"url"
] |
6i3mey | Why livestreams (Twitch, Youtube, etc) have such a clear and smooth quality while video calls (Skype, etc) are so laggy and low quality? | I watch a Youtube channel called Funhaus and they often stream using their webcam and the quality is perfect (also used for recording). They also play games with other Youtube channels and they use Skype to chat with them before and after matches, but the quality is incredibly bad. Why? | Technology | explainlikeimfive | {
"a_id": [
"dj38uwg",
"dj3pog0"
],
"text": [
"Because you aren't watching them \"live\". There's a delay corresponding to the amount of time it takes to send the data to the streaming services, then to you. Once the streaming service has the data, they can stream it to you unhindered. The delay allow... | [
"url"
] | [
"url"
] |
6i4uoc | Why did colour come to cinema before TV (For example, Dr. No was released in 1962 in colour but An Unearthly Child was in greyscale and released in 1963) | Technology | explainlikeimfive | {
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"dj3isix",
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"text": [
"It all comes down to transmission. To move a old black and white movie, you put a can of black and white film in a box and drove it to a theater, you then shined a light through it and it showed up on screen. To move an old color movie, you put a can of c... | [
"url"
] | [
"url"
] | |
6i51y9 | Why do phone cameras record video in verticle format by default when held in their normal position when a horizontal image is the default when watching any video? | Technology | explainlikeimfive | {
"a_id": [
"dj3kepi"
],
"text": [
"The camera sensor is rectangular. It does not rotate. So by holding the camera vertically you are also holding the sensor vertically. The camera *could* crop the video down to a lanscape orientation, but it will be at the cost of vastly reduced resolution (you're litera... | [
"url"
] | [
"url"
] | |
6i61fr | How can aftermarket Android developers make custom ROMs and kernels that noticeably outperform a phone's stock software which was developed by teams of engineers who know the software inside and out? | Technology | explainlikeimfive | {
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"text": [
"Android is just Android. It's the same operating system. Custom OS releases like Cyanogenmod/LineageOS use the same prop... | [
"url"
] | [
"url"
] | |
6i6hjp | Why is reverse engineering sometimes impossible? | Technology | explainlikeimfive | {
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"dj3tp32",
"dj3t4yu"
],
"text": [
"It's all about cost. This isn't a technology question, it's a cost question. Incremental costs to make more engines on an established manufacturing line is less than the cost to set a competing line.",
"Likely because the rockets in question are the p... | [
"url"
] | [
"url"
] | |
6i6lf5 | How does time "fix" electronics? | Similar things have happened in the past but a week ago my son dropped a stuffed bunny he has that sings, claps its hands and waggles its ears when you press on its foot. He dropped it on the floor hard and instead of working it would just slightly vibrate until you flipped a hard off on switch. Tried resetting it a fe... | Technology | explainlikeimfive | {
"a_id": [
"dj3ua3a",
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],
"text": [
"Electronics are made possible by metal connections that allow electricity to flow through them. Over time or through repeated use, these metal connections can be corroded and/or lose contact. Normally this ends making the electronics unusable. However, wi... | [
"url"
] | [
"url"
] |
6i7b9p | What do AntiCheatSystems in games look for while allowing harmless mods (in singleplayer), but banning harmful hacking (in multiplayer)? | Bonus question: what is the difference between mods and hacks ? | Technology | explainlikeimfive | {
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"dj456es"
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"text": [
"It can vary from one anti-cheat to another, but generally speaking they scan certain sections of memory for modifications, namely the `CODE` section and maybe parts of the `DATA` section. This is good for detecting hacks that write to memory to modify values or change g... | [
"url"
] | [
"url"
] |
6i7dmm | How do barcodes never wind up being duplicated by different companies? | I have always wondered, with the absolutely stupid array of everything sold in different countries and the number of EAN and UPC barcodes in existence, how come companies never duplicate a barcode? Is there like, a central register of these things? Do you have to apply to a body to get one for your product? | Technology | explainlikeimfive | {
"a_id": [
"dj40v2p"
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"text": [
"The codes include a manufacturer code that's unique to each manufacturer. Because every manufacturer has a unique manufacturer code, the full code cannot ever overlap another manufacturer's product numbers."
],
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5
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6i8l7a | What and where are the "sensitive electronics" in an American passport and how do they work? | Technology | explainlikeimfive | {
"a_id": [
"dj49wj1",
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],
"text": [
"Additionally, please list exact component SKUs and suppliers where they can be obtained, and a tutorial on proper assembly. Thanks!",
"There is an RFID chip embedded in the paper in the passport, it works similar to the credit cards that you can tap t... | [
"url"
] | [
"url"
] | |
6i9qyh | How does Google's search algorithm work and what was the internet like before it? | Technology | explainlikeimfive | {
"a_id": [
"dj4ju5l",
"dj4k8hf",
"dj4jx3w"
],
"text": [
"before google, all search engines indexed by the content of the page. they scrubbed the words on the page and ranked them by how many matches of the search string there are. it's very easy to uprank yourself. if your page is about video gam... | [
"url"
] | [
"url"
] | |
6i9vvs | What prevents microchip manufactures from using defective (but functional) CPUs | Lots of CPUs dont pass the tests, for different reasons. But i figure a good amount of them could still be used if they were underclocked or with the defective cores disabled. | Technology | explainlikeimfive | {
"a_id": [
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"text": [
"make a CPU's with 8 cores. did all 8 cores pass? great! that's a Intel i7-8000 series. oh shucks....2 of them broke? that's not so bad. that's Intel I7-6000 series. oh seriously? half the cores are busted? damn.. that's Intel i7-4000 series wtf? more than... | [
"url"
] | [
"url"
] |
6ib2ve | How come the US has been the only country to send deep space probes out (past Mars)? | Several countries have sent probes to the moon, Mars, and Venus, but only the US has sent probes into deep space. How come there was never a soviet/russian Voyager analogue or even a mission to Jupiter or Saturn? How come the ESA has never spent a probe to Uranus or Neptune? Just something that I was thinking about! | Technology | explainlikeimfive | {
"a_id": [
"dj4yxcx",
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"text": [
"Imagine you land on a deserted island after a maritime accident with a group of people. One guy prioritises building a low powered beacon that is basically a needle in a hay stack. On the off-chance something comes of it then all of you will benefit from ... | [
"url"
] | [
"url"
] |
6ic8a0 | what happens when we click on dangerous pop up ads? | Technology | explainlikeimfive | {
"a_id": [
"dj56bwi"
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"text": [
"Usually, nothing too bad happens. Browsers don't let scripting languages used to create websites (and ads) to access your files and such things. At least that's how it should be: Sometimes, the browsers themselves have vulnerabilities, which allow hackers to use Java Sc... | [
"url"
] | [
"url"
] | |
6iclk7 | Scientifically, what is the difference between color film and black/white film? What changed and allowed film to be in color? | What gives? I understand the basics of how film cameras work, but for the life of me I don't understand what changed. | Technology | explainlikeimfive | {
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"text": [
"Black and white film consists of a single layer of material that changes opacity based on the amplitude of light that flows through it, regardless of the color of that light. This produces a film 'negative'. The negative is then processed s... | [
"url"
] | [
"url"
] |
6ieeeb | Where is the money used in indie game development? | When you have an indie game developer, often they'll start a Kickstarter in order to get the funds necessary to create their game. What do they do with this money? What part of the process requires it if they're doing it themselves or with a small group? | Technology | explainlikeimfive | {
"a_id": [
"dj5j8xr"
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"text": [
"Like most humans, indie game developers need food and shelter. A significant part of the money will go towards the living costs of the developers. Apart from that they may need to buy specialist equipment (particularly if the game is for consoles) and software licenses.... | [
"url"
] | [
"url"
] |
6ieq2n | How can my computer run Fallout NV, Portal 2, and TF2 on nearly max settings, while barely being able to handle Minecraft? | Technology | explainlikeimfive | {
"a_id": [
"dj5mdx5",
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],
"text": [
"Here are 2 reasons: 1. Minecraft is written in Java, which is slower than C++, the programming language used to implement most other 3-D computer games. Java is a popular programming language for all sorts of things, but it's not typically ... | [
"url"
] | [
"url"
] | |
6ifkfw | Why can't we provide internet by using the same technology that broadcasts television shows? | Video on television plays very smoothly in real time, while the same video may buffer when using Internet. That must mean that television have better and faster network. So why can't we use the same principles to make internet available at faster speed. Also TV network is much more spread out in the world, so if we alr... | Technology | explainlikeimfive | {
"a_id": [
"dj5t9hv",
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],
"text": [
"The TV setup has two BIG perks the internet doesn't. * It's a one-way connection. * The messages are being broadcast to no one in particular with little concern about privacy. Your internet is bi-directional AND intended to be a connection ... | [
"url"
] | [
"url"
] |
6ii7uh | How come our regular water from the pipe isn't dirty? | Title says it. I have a hard time imagining water going such a long way to our taps without getting contaminated somehow. Thanks for your time! | Technology | explainlikeimfive | {
"a_id": [
"dj6gc28"
],
"text": [
"If you're on city water it is more or less a closed loop from supply point to you. The local water supplier handles the cleaning and filtering. The main lines have a long way to travel generally and any sediment picked up will move and settle where it's lowest. The main... | [
"url"
] | [
"url"
] |
6iibyb | Why do text messages sometimes duplicate giving the impression to the receiver that the original message was sent twice? | Technology | explainlikeimfive | {
"a_id": [
"dj6lu8q"
],
"text": [
"This is not what actually happens in practice, I am sure, but it might be illustrative. Once the message is sent from your phone it goes to a Queue machine to be delivered. That Queue machine passes the jobs to one of a large group of machines to do the actual job of de... | [
"url"
] | [
"url"
] | |
6iio2f | Why do some DVD's still play in letterbox format if the TV is widescreen? | Technology | explainlikeimfive | {
"a_id": [
"dj6ker5",
"dj6k5i7"
],
"text": [
"Movies are often filmed in 2.39:1 or 2.35:1. Which is a different ratio than your TV which is 16:9. As such it fits the full length of the video (which is longer than your TV is normally, so it puts black bars on the top and bottom to compensate. You're f... | [
"url"
] | [
"url"
] | |
6iioes | Why does ALL software need regular updates all the time? | I understand that newer computing power and better system specification would make things like Windows XP obsolete over time. But why can't we just upgrade some components of Windows XP to make use of better resource like 5TB RAM and 32core 64GHz CPU to have 3D holographic display and patch some security loophole when ... | Technology | explainlikeimfive | {
"a_id": [
"dj6sel3",
"dj6l8pm"
],
"text": [
"There are plenty of software packages out there that don't need and rarely do get updates. The problem is that since today everything is internet connected, much of the software on those internet connected devices needs to be constantly patched to close n... | [
"url"
] | [
"url"
] |
6ik7w9 | How can we call or video-chat with someone across the world and sound like we're talking to them instantly? | Does this mean that radio waves are as fast as the speed of light? | Technology | explainlikeimfive | {
"a_id": [
"dj6wgxa",
"dj6wchl"
],
"text": [
"There is a small (sometimes noticable) delay which we precieve as basically normal conversation. A huge contributor to minimizing this delay is fiber optic technology. It allows information to travel the speed of light while in transit across thousands of... | [
"url"
] | [
"url"
] |
6ikb5t | why do graphics cards, RAM and hard drives have such different prices per GB? | Obviously it's not the same type of memory, but why does a 4GB graphics card cost ~10x as much as a 1TB HDD? | Technology | explainlikeimfive | {
"a_id": [
"dj6xthf"
],
"text": [
"Read / Write speeds (usually) is what makes a difference in prices. The Rule of thumb here is Faster access speed - > Expensive parts. I will explain why difference memories need to have difference speeds. RAM and hard-drives work \"almost\" the same way, you store info... | [
"url"
] | [
"url"
] |
6io9qy | How do cell phones connect to cell towers that are far away? | It seems like the radio in your phone shouldn't be powerful enough to communicate over a very far distance. You need a big, powerful tower that broadcasts out, but the little handheld device has to go just as far. | Technology | explainlikeimfive | {
"a_id": [
"dj7s9za",
"dj7rllq"
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"text": [
"It's really not going all that far, especially if you're in a major city. From where I'm sitting at right now, there's 2 TMobile towers within 2 miles (one is about 1/4 mile away). There's about 25 towers that service the entire Las Vegas metropolitan are... | [
"url"
] | [
"url"
] |
6iqrrn | How do Life Support Machines work? | Always been curious. It's probably simple but would be nice to have an answer from real people instead of a search engine. | Technology | explainlikeimfive | {
"a_id": [
"dj8g2rw",
"dj8opn0"
],
"text": [
"Your body is basically a bunch of machines that do stuff to keep you alive. Your lung breaths, your liver filters blood and so on. If those things fail you will have problems! Life support machines just do these functions. Say your liver breaks, you get a... | [
"url"
] | [
"url"
] |
6ir7e2 | How did people find cheat codes for video games back when they were a thing, did the developers release them or did people find out on they're own? | Technology | explainlikeimfive | {
"a_id": [
"dj8hrnu"
],
"text": [
"The developers leak them and they spread. They were commonly found in gaming magazines or cheat books if you remember those."
],
"score": [
8
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6irj85 | How do WiFi signals work and how far can they reach? | Technology | explainlikeimfive | {
"a_id": [
"dj8qf56"
],
"text": [
"As you can imagine with many technologies, they need to be standardised. A computer needs to know what data format another computer is expecting, what speed they need to communicate at, what other protocols it may be dependent on etc. The IEEE (Institute of Electrical a... | [
"url"
] | [
"url"
] | |
6irk2p | Why do ISPs charge more money for more data usage? If the cable is in place, does the amount of data moving through it really make a difference? | Technology | explainlikeimfive | {
"a_id": [
"dj8k96i",
"dj9fwn0"
],
"text": [
"Simple supply+demand. Think of water pipe that can deliver so many gallons of water per hour. If you have 100 people getting water from the pipe each person will only get a small amount. Now add another 1000 people getting water from that pipe... the only... | [
"url"
] | [
"url"
] | |
6is72e | Why do headphones get tangled in your pocket even if you don't touch it too much? | Technology | explainlikeimfive | {
"a_id": [
"dj8nseh"
],
"text": [
"Cords get tangled because there is only one possible configuration of a cord that will not result in it tangling: being absolutely, perfectly straight. Any other configuration and it will tangle. a tiny bend ro wrinkle will get bigger with every minor motion. Not quickl... | [
"url"
] | [
"url"
] | |
6it6s7 | why was is normal to have automatic transmissions with less gears than a manual one before but now you get ones with more than double a manual one? | Technology | explainlikeimfive | {
"a_id": [
"dj8wkw7"
],
"text": [
"Automatics have traditionally operated using planetary gearsets. Due to the way they function this allowed 3 forward gears, neutral and reverse. That was pretty normal until approximately 1980. Next generation Automatics added an overdrive. This allowed 4 forward gears.... | [
"url"
] | [
"url"
] | |
6ium98 | How are we able to detect earth sized planets many light-years away, as well as potential composition, but aren't able to definitively confirm the existence of a much larger 9th, and 10th Planet in our own Solar System | Technology | explainlikeimfive | {
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"text": [
"You're standing in a pitch black field at midnight. No moon, nothing. Your only light source is the screen of your mobile phone. 150 feet away is a guy in all black clothing. 1000 feet in the other direction is... | [
"url"
] | [
"url"
] | |
6ivo3l | the difference between interpreted and compiled computer languages? | I'm teaching myself code right now and this subject has come up here and there. I feel like I understand general qualities of the two languages but don't have a fundamental understanding of what they truly are. | Technology | explainlikeimfive | {
"a_id": [
"dj9f8wj"
],
"text": [
"Compiled languages are translated directly into the machine code that the processor can execute. It would be like taking a cookbook written in Greek, and getting it translated to a cookbook written in English. Once you have the translated cookbook, you can then follow t... | [
"url"
] | [
"url"
] |
6ix17w | How did people years ago bake cakes? | I mean I have a modern oven which allows me to precisely set the temperature. Some kinds of cake don't mind being baked a few degrees colder or hotter, but others seem to be very sensitive and the temperature needs to be precise. How did people years ago bake cakes if they couldn't even precisely measure the temperatur... | Technology | explainlikeimfive | {
"a_id": [
"dj9qzkw",
"dj9rjee",
"dj9saty",
"dj9xe2i"
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"text": [
"It's true that in centuries past oven temperature could not be measured as accurately, but each baker would know their own oven through experience. Bake 1000 pies in one oven and you would be able to judge it pretty well desp... | [
"url"
] | [
"url"
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6ixjaj | Why are there so many spam links, specifically to sex sites? Do they actually work? Who is the ultimate benefactor? | I run a website and get hundreds of spam comments that get caught in our filter. Most of it sound like completely random websites and I have a feeling they don't get many clicks. If this is a profitable way to advertise, what exactly are they selling? What's the end game? Where does the profit come from? | Technology | explainlikeimfive | {
"a_id": [
"dj9zch0",
"djac57l"
],
"text": [
"It costs virtually nothing to send an email. A small fraction of a cent. If one in a million people clicks the link they make money. Especially because... Most of these 'sex sites' are just pirate porn sites with malware. They don't want to sell you porn ... | [
"url"
] | [
"url"
] |
6izkj7 | What is the difference between machine learning and deep learning? | Technology | explainlikeimfive | {
"a_id": [
"djad25l"
],
"text": [
"Simple version: deep learning is one kind of machine learning. More complex: Machine learning describes any algorithm that contains an often-large set of \"learning parameters\" which are \"trained\" on a set of data with known properties, and then used to make predicti... | [
"url"
] | [
"url"
] | |
6j0dfa | Why do some websites require credit card CVC and some do not at checkout? | Seems if someone could charge without it, why is it needed some places? What's more, why is it needed a'tall? | Technology | explainlikeimfive | {
"a_id": [
"djamjjf"
],
"text": [
"Fraud prevention. Asking for the CVC is a much stronger proof that the purchaser actually has the card in question. The three digits of the CVC you are talking about are not stored electronically on the card so it can't be skimmed. Far from a bullet proof security measu... | [
"url"
] | [
"url"
] |
6j22pw | Movies and film from past decades still look fairly decent. Why do live sports from the same eras look so bad? Even highlights from just 10 years ago look greatly inferior to nowadays. | Technology | explainlikeimfive | {
"a_id": [
"djavkda"
],
"text": [
"The type of recording media being used. Film looked (and still looks) awesome, but it's really expensive and time consuming to work with. It also takes extra steps to take something shot on film and broadcast it on TV. So for sports, it just wasn't an option. Recording ... | [
"url"
] | [
"url"
] | |
6j33vy | Why has there been a surge in robocalls recently? | Technology | explainlikeimfive | {
"a_id": [
"djb6sva",
"djb8hoa",
"djbbzpx",
"djb72yx",
"djbcnbb",
"djbc049",
"djbc29p",
"djb70ab",
"djbcl1b",
"djb77ik"
],
"text": [
"I read something a while back that mentioned the internet as a big reason for the influx in robocalls. Basically, it's easier to produc... | [
"url"
] | [
"url"
] | |
6j3del | How does Wine (software that runs Windows programs on Linux) work? | I thought Wine was some sort of emulator until I found out that it's actually an acronym for Wine Is Not an Emulator. Can someone explain the difference between an emulator and a compatibility layer? | Technology | explainlikeimfive | {
"a_id": [
"djb6jt1"
],
"text": [
"It's kind of confusing, because Wine emulates system calls of the Windows operating system, but it is not a virtual machine. A true emulator would actually run the same OS code a Windows machine would run, via a virtual machine. Wine is a different program that emulates... | [
"url"
] | [
"url"
] |
6j426t | Why is it a such big deal to have a 20, 50, or even 100qubit processor, when it seems like it's a pathetically small number to do anything with? | Technology | explainlikeimfive | {
"a_id": [
"djbc103",
"djbcbjk"
],
"text": [
"What is a pathetically small number? Going 0.5MPH is slow. Going 0.5C is insanely fast. The point is, it's a quantum computer. URL_0 > This is where the concept of “quantum supremacy” – being able to conclusively demonstrate the ability to perform a calcu... | [
"url"
] | [
"url"
] | |
6j51pv | How come the upcoming solar eclipse is causing anxiety about the loss of solar power generated, but it's no big deal if it's a cloudy day? | Technology | explainlikeimfive | {
"a_id": [
"djbk8ls"
],
"text": [
"Short answer: uv can penetrate clouds more than it can penetrate the fucking moon. Cloudy days do cause some decrease in solar intake but not as much as a space rock"
],
"score": [
10
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
6j5npk | How do recycling companies deal with all the crap left in stuff people throw away? | Technology | explainlikeimfive | {
"a_id": [
"djbpzbg"
],
"text": [
"A lot of recycling things have a liquid press for containers that still have drinks left in them. However, food waste shouldn't be thrown into the recycling, so most places will consider the whole bag or the item contaminated and just throw it away."
],
"score": [
... | [
"url"
] | [
"url"
] | |
6j6ycr | Why is it so hard for law enforcement to locate and bust scam call centers? | Technology | explainlikeimfive | {
"a_id": [
"djcgq82",
"djc3vxr",
"djcdhqw",
"djc9nxs",
"djc9jll",
"djceahk",
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"djc9nrn",
"djc40ej",
"djcajfj",
"djcnrod",
"djcc81m",
"djciojt",
"djcta3p",
"d... | [
"url"
] | [
"url"
] | |
6j96gv | Why do text messages (still) not have the ability to be expressed with (at least) bold and italics? (And other text markup/down) | I would think it to be entirely possible, and especially probably on iPhone's iMessage platform, if not standardized across the board. Just like emojis. Why hasn't this been implemented? ((Example of markdown formatting *used here* **on** ***Reddit***)) | Technology | explainlikeimfive | {
"a_id": [
"djcijxs",
"djclkaz"
],
"text": [
"To understand that you have to understand how text messages are sent. Your phone has to periodically ping the cell network to alert the towers to its presence. Likewise, the towers have to ping the phone back to let the phone know it's connected to the ne... | [
"url"
] | [
"url"
] |
6jaljh | Why do iPhone chargers break so fast? | Technology | explainlikeimfive | {
"a_id": [
"djcsx4r"
],
"text": [
"The apple lightning cables especially appear to be designed to look pretty. As evidenced by a lack of strain relief, and thin wires/insulation, little consideration was given for the lifespan of the cable; essentially a consumable."
],
"score": [
6
],
"text_... | [
"url"
] | [
"url"
] | |
6jbo6g | Why can YouTube's mobile app seamlessly transition between video quality, where as on desktops, the video has to pause and buffer? | Technology | explainlikeimfive | {
"a_id": [
"djd3753",
"djd5sxf"
],
"text": [
"I have an additional and releated question to this, why is it that the twitch app can stream flawlessly but the chat stops working after like 30 seconds?",
"Apps have a lot more control over their own video streaming than websites. In the YouTube app ... | [
"url"
] | [
"url"
] | |
6jfszz | How does one film a shot of someone looking into a mirror from their perspective? | In like a TV show or a movie, how do we see someone's POV as they are looking into a mirror? Wouldn't you see the camera? | Technology | explainlikeimfive | {
"a_id": [
"djdwfc7"
],
"text": [
"It's a simple trick. They angle the mirror so that the performer is actually looking at the camera, not herself. Now the camera is looking at her. In a few cases they use digital video editing instead, and just fake the mirror image, editing in something the recorded se... | [
"url"
] | [
"url"
] |
6jft4p | Why do cars no longer need the giant antenna on the front to pick up signals? | Technology | explainlikeimfive | {
"a_id": [
"dje7asl",
"djdwjo3"
],
"text": [
"Trucks still have them. In passenger cars with plastic bodies the antenna can be hidden. So too in window glass. Additionally receivers are \"better\" now days because discrete electronics are more sensitive than in the fifties and sixties, so it takes le... | [
"url"
] | [
"url"
] | |
6jfy0v | Why can't my phone simultaneously use wifi and data? | And, given that that my phone is limited to the one or the other, why is my connection interrupted whenever I switch between wifi and data? Is is possible (i.e. does the technology exist) to switch seamlessly between the two? | Technology | explainlikeimfive | {
"a_id": [
"djdxweg",
"djdxqvj"
],
"text": [
"(Don't know about iphone) If you are using Android go to settings > WiFi and turn on smart network switch. I belive this feature exist in all android devices could be wrong. And if you are using Samsung devices you can use WiFi and mobile data simultaneou... | [
"url"
] | [
"url"
] |
6jg6mr | Why do computers have to download and install software? What's the difference between the two and why can't it install as it's downloading? | Technology | explainlikeimfive | {
"a_id": [
"djdzatf",
"djdzke2",
"djdzui5"
],
"text": [
"One gathers the files, one applies it. Depending on what it is, if you started installing before you had all the pieces of the file, and something happened to the download, bad things could potentially happen.",
"It is possible to insta... | [
"url"
] | [
"url"
] | |
6jh1hs | Why is a mouse more accurate than a joystick on a controller | Thanks for answers! | Technology | explainlikeimfive | {
"a_id": [
"dje6fk9",
"dje69wr"
],
"text": [
"Because a movement on a joystick applies \"velocity\" but movement on a mouse applies a position change. Think about it, you move a joystick to the left, it will keep going left even though your hand is not moving anything, just keeping the joystick on th... | [
"url"
] | [
"url"
] |
6jh77n | Why did cell phone interference with speakers used to happen, and why has it since resolved? | In the earlier times of cell phones, when receiving a phone call, speakers nearby would temporarily [play an interference pattern]( URL_0 ). I have'nt heard the sound in many years, and was wondering why | Technology | explainlikeimfive | {
"a_id": [
"dje7enx"
],
"text": [
"Switch on bands to Lte. Once in awhile, when my phone is on edge or 3g, I still get interference. But since almost everyone has an LTE phone, it's on a different wavelength."
],
"score": [
6
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] |
6jhfzr | How does https hide visited websites from internet service providers? | Technology | explainlikeimfive | {
"a_id": [
"dje9bb2"
],
"text": [
"It does not hide which websites you visit. However it encrypts (scrambles with an algoritm) the communication so they cannot see what you are doing on the website."
],
"score": [
3
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
6jjn1q | How does a listening voice assistant like "OK Google" not totally drain the battery? | Technology | explainlikeimfive | {
"a_id": [
"djeqnlr",
"djerd1v"
],
"text": [
"It does. This is why low battery mode in phones disables voice assistant's automatic listening. It has to process all sound it hears for the right keywords and that isn't a task done without needing power.",
"As another reply has said, it does. It's w... | [
"url"
] | [
"url"
] | |
6jkbmc | Why does Facebook seem to be overrun with still images as videos lately? | Technology | explainlikeimfive | {
"a_id": [
"djew6nx",
"djewah0"
],
"text": [
"Facebook Slideshow - it is a feature they released last year. Facebook wants you to share more stuff on Facebook - so it's rolling out a new feature designed to do just that. The social network thinks video is the answer to all its woes. According to The ... | [
"url"
] | [
"url"
] | |
6jl1rg | Why can't popular websites seem to keep malvertisements from appearing, especially for mobile sites? | I frequently visit image links from Reddit that point to Tumblr, and I'd guess that about 10% of the time, I get redirected to a page that is styled like google, and claims my phone is infected with some virus. Going back only causes a new fake warning to show. I have to close the browser completely to resume what I'm ... | Technology | explainlikeimfive | {
"a_id": [
"djf0qup"
],
"text": [
"Most websites don't care what ads appear. They only care about how much the ad pays per click. So if the website (say reddit) has both a malware ad and a legit say amazon ad, and the malware ad payed $1.50 per click where as amazon payed $0.60 per click they would prefe... | [
"url"
] | [
"url"
] |
6jl316 | Why do consoles still need discs even after installing in order to play a game? | Technology | explainlikeimfive | {
"a_id": [
"djf00pv",
"djf02he",
"djezu9k"
],
"text": [
"For the newest consoles where the data is installed to the hard disk, it's just to make sure you own the game. The disc is essentially a licence key. They could have gone with a system like Steam where even if you buy something on a disc, y... | [
"url"
] | [
"url"
] | |
6jlsbo | How does South Korea have the "fastest internet in the world"? | Technology | explainlikeimfive | {
"a_id": [
"djf5mbd",
"djf9s4x"
],
"text": [
"South Korea is a very small country with a large population. Thus, the cost of laying infrastructure is often lower than sparsely populated countries. DSL is still very popular, and very inexpensive to provide to dense apartment.",
"South Korea has th... | [
"url"
] | [
"url"
] | |
6jm4df | How does military check for people in radius of atomic weapon test? | There has been hundreds of atomic weapons tests. How is military sure that there is no living people in 100km radius or however big the explosion is? Pretty sure they kill animals but we never hear about people who died during those tests. If there was so many and explosions are so huge, there must have been casualties... | Technology | explainlikeimfive | {
"a_id": [
"djfb5al",
"djf8ibd",
"djf97uk"
],
"text": [
"The tests were generally done on areas that were under military control with low population densities. E.g., the Nevada Test Site is an Air Force bombing range. In the Pacific tests, this was more of a problem since while you could identify... | [
"url"
] | [
"url"
] |
6jnj8i | Why is it detrimental to laptop batteries if left plugged in for extended periods of time and do mobile phones fall victim to this dame problem over time? | Edit: Same | Technology | explainlikeimfive | {
"a_id": [
"djfmo07",
"djflgoo",
"djfx6uu",
"djgarjb",
"djg97wf",
"djfxg0r"
],
"text": [
"To answer your second question: > do mobiles phones fall victim to this dame [sic] problem over time? Yes. --- Now to answer the first. Think of modern batteries (lithum-ion) as balloons, the cha... | [
"url"
] | [
"url"
] |
6joxi8 | how noise cancelling headphones work. | Sounds like magic to me. | Technology | explainlikeimfive | {
"a_id": [
"djfwgod",
"djfwenl"
],
"text": [
"They generate something called destructive waves. URL_0 They have a microphone on the outside of the headphones, which listen to sounds around you. They then generate the \"opposite\" sound, which cancels out the ambient noise, leaving only silence.",
... | [
"url"
] | [
"url"
] |
6jpv8n | Why does 1% battery life last longer than any other percent? | Technology | explainlikeimfive | {
"a_id": [
"djg6g45",
"djg5owx"
],
"text": [
"The battery life indicator on a device is indicative only. Modern devices take a particularly active approach to battery management. In order to maximise battery life, a device migh fast charge the battery up to 100% when it's first plugged in, then allow... | [
"url"
] | [
"url"
] | |
6jrr1e | How come some GIFs need a "GIFV" link to be viewed, while others work without even a click? | Technology | explainlikeimfive | {
"a_id": [
"djgmk1l",
"djgmly5"
],
"text": [
"Traditional gifs are fundamentally images. The format was not designed for video. It was always an image format, but with the option of having a short series of images to make a little animation. But then people starting using gifs for much more than they... | [
"url"
] | [
"url"
] | |
6jsah9 | where do datacenters back up to? | Most companies back up to the cloud these days, which is a server in some datacenter. I am wondering: where do datacenters send their own back ups to? Do they use some off-site storage? Do they back up to different centers, maybe to some center not related to their own organization? Starts to sound like inception, but ... | Technology | explainlikeimfive | {
"a_id": [
"djgm80g"
],
"text": [
"First, \"datacenter\" doesn't really mean much in this context. A datacenter might host servers for hundreds of companies, and it's *the individual company's responsibility* to back up their data, **not** the datacenter. Hell, most companies would be mad as hell if anyo... | [
"url"
] | [
"url"
] |
6jt4zs | What does the 'Renew Lease' button in the wifi setting on Apple devices do? | Technology | explainlikeimfive | {
"a_id": [
"djgrmcn",
"djgrni7",
"djgrnwh"
],
"text": [
"When you connect to a wi-fi network(in most configurations) you are given an IP address to use. This IP address is passed out by a protocol called the Dynamic Host Configuration Protocol(DHCP). When DHCP gives you an address, it lets you, a... | [
"url"
] | [
"url"
] | |
6jtmho | Why Facebook may finally have to compromise its user experience in order to keep growing | Was hoping someone could help explain this article from recode for me. Really interesting stuff just a bit over my head. URL_0 | Technology | explainlikeimfive | {
"a_id": [
"djgvs4r",
"djgvwnh"
],
"text": [
"So Facebook has grown (in terms of money) up until now by signing up rich westerners. Because more rich westerners kept signing up, companies kept paying more for ads, and Facebook kept making more money. But now, they've pretty much signed up most of the... | [
"url"
] | [
"url"
] |
6jto9o | How is underclocking sometimes a solution to avoiding black screens and the PC freezing? | I understand the concept of overclocking (thanks to ELI5) now, but I recently came across a laptop freezing problem where people suggested to underclock the RAM and GPU, and the freezing problem was gone - although no one bothered to explain why it solves it. | Technology | explainlikeimfive | {
"a_id": [
"djgvxkf"
],
"text": [
"Sometimes a computer might have issues running at stock clocks if its been abused or is old. Sometimes its heat related. Lower clock speeds are easier for chips to run at, and if the voltages adjust automatically, lower clocks will also use less voltage to operate (decr... | [
"url"
] | [
"url"
] |
6jtthu | Why do hackers hack things like youtube / Instagram / twitter ect accounts and do nothing but use it to promote themselves or their hacking group? | Technology | explainlikeimfive | {
"a_id": [
"djgz1ce",
"djgyyeo"
],
"text": [
"Ethical hacking is definitely a thing, although 'ethical' is used loosely. Some of these hackers run a business that helps other businesses find security flaws in their network and application. Except too often, this hacking is done before anyone agrees t... | [
"url"
] | [
"url"
] | |
6juv68 | How does a virus like "Petya" lock a computer so that it can't just simply be deleted, and how do the makers receive the ransom money without their identities being disclosed? | Technology | explainlikeimfive | {
"a_id": [
"djh5v26"
],
"text": [
"> how does a virus like \"Petya\" lock a computer so that it can't just simply be deleted The software takes everything on the hard-drive and encrypts it. Everything, including OS that gets loaded at bootup. So when it reboots, instead of grabbing the OS you expect it t... | [
"url"
] | [
"url"
] | |
6jvbxn | With things like fingerprint scanners on everyday things such as phones, is there anything holding them back from being applied to guns and other dangerous items? | Technology | explainlikeimfive | {
"a_id": [
"djh9r0r",
"djh9rs7",
"djhhjt5",
"djhiwr4"
],
"text": [
"three things: 1. No gun manufacturer wants to be the first to sell a \"secure\" gun. The tech has been around for years - cheap RFID tech in a ring needing proximity, fingerprint readers in the grip, gun-key systems built int... | [
"url"
] | [
"url"
] | |
6jw33w | how come software companies have to wait for hackers to find weaknesses in their system and not just figure it out themselves before rolling out a software package? | Technology | explainlikeimfive | {
"a_id": [
"djhfz0v",
"djhn26p",
"djhg9ni",
"djhi1s1",
"djhfjst",
"dji43tb",
"djhf7f3",
"djhgnbx"
],
"text": [
"Try to think about all the ways you could break into your home if you were a burglar. You get a bit of an advantage because you live there and know the layout. Now, ... | [
"url"
] | [
"url"
] | |
6jwnoc | Stupidly, I replied to a text near a petrol bowser & was embarrassingly told off over the PA system to "GET OFF YOUR PHONE", in front of everybody. What're the actual concerns for using phones at service stations? (And how stupid was I?) | Technology | explainlikeimfive | {
"a_id": [
"djhjr8o",
"djhk60b",
"djhmdv3"
],
"text": [
"It's an urban myth that mobile phones can ignite gasoline vapor (it's actually static electricity, which doesn't come from a phone). It's complete bunk, and they're parroting misinformation. Just keep a good ole \"fuck you\" chambered when ... | [
"url"
] | [
"url"
] | |
6jzd0d | With all the talk about electric cars releasing more Co2 than a regular gas car. What part of the production process of the carbatteries release so much Co2? | Technology | explainlikeimfive | {
"a_id": [
"dji50xz"
],
"text": [
"Mostly the mining and refinement of the metals - nickel or lithium depending on the type of battery, along with decent amounts of copper and rare earth metals for the motors. That up-front carbon cost might be cancelled out by reduced emissions over the life of the vehi... | [
"url"
] | [
"url"
] | |
6jzihw | Why is computer memory always multiples of 2? | firstly, yes i know its already been kind of answered [here]( URL_0 ) but im looking for a more in-depth answer. In the post linked above some people have said that its in multiples of 2 and it has something to do with binary and maths. But no one says in in a way i understand, one redditor did make a comment about thi... | Technology | explainlikeimfive | {
"a_id": [
"dji5n81",
"djideaz",
"dji5me5"
],
"text": [
"binary works like light switches. Each data channel is on or off. 0 or 1. so with 2 channels you can count 4 positions. 00=0 01=1 10=2 11=3 Each data channel you add doubles the potential number of states you can count to 000=0 001=1 010=2 ... | [
"url"
] | [
"url"
] |
6jzkij | Why is it that a company like Apple can take iPhone preorders in advance and fulfill them over time, but a company like Nintendo will frequently sell out of new products and leave customers at the mercy of pre-ordering and over-priced second hand sellers? | I've never had a problem getting a new iPhone, but I've never seen a Switch in the wild. I have 0 expectations of getting an SNES mini. I remember brawling customers in Target to get a Wii way back when. | Technology | explainlikeimfive | {
"a_id": [
"djir91j"
],
"text": [
"Honestly, I think it's more attributable to poor decision making rather than outright malice as a lot of people will suggest. Remember that Nintendo has a hit or miss history with its gaming consoles. The N64 sold great (33M units), but the GameCube did relatively poorl... | [
"url"
] | [
"url"
] |
6k1ak6 | How does youtube meet the incredibly high demand for storage required for all the uploaded videos? | I read that if you tried to watch every video on youtube, for every minute of video you watched, you would fall one week behind due to all the uploads that would take place in that one minute. So this raised the question - how does youtube (or Google) meet such an incredible demand for storage? Are there algorithms tha... | Technology | explainlikeimfive | {
"a_id": [
"djikyge"
],
"text": [
"By having entire buildings filled with servers and hard drives. How many terabyte drives can you fit in a million sq ft datacenter? Google has over 20 datacenter worldwide. And you continuously add more drives. By the rackful."
],
"score": [
15
],
"text_urls... | [
"url"
] | [
"url"
] |
6k1j8x | why even If I am on a 60 Hz monitor, 100 fps feels smoother than 60fps | Technology | explainlikeimfive | {
"a_id": [
"djiumwa",
"djitdxx",
"djivdfk"
],
"text": [
"A 60 Hz monitor puts frames out every 16.6 ms (milliseconds). 60 FPS is just an average, you had 60 frames come out in that second. These frames don't necessarily match up well time wise with when the monitor outputs its frames. Usually a 1... | [
"url"
] | [
"url"
] | |
6k2exl | why is internet explorer so much slower than the other browsers? | Technology | explainlikeimfive | {
"a_id": [
"djiutr2",
"djisugv"
],
"text": [
"I will agree with /r/moujaune on many points, but expound on others. 1. Microsoft has never focused on excellence in design, especially in their early history. Most of their products were \"good enough\" but they never really invested in producing \"the b... | [
"url"
] | [
"url"
] | |
6k3bhj | How does the measuring of electricity work? | I understand that voltage=total power output and watts=electricity "pressure". Why are some electrical systems much more dangerous than others? For example you can safely (or with minimal repercussions) touch the positive and negative terminals on a DC vehicle battery, but not for an AC power outlet in your home? Which... | Technology | explainlikeimfive | {
"a_id": [
"djizng4"
],
"text": [
"Voltage is the electric potential. Thats more like the pressure than anything else. Voltage hurts but doesn't really harm you. This is because our nerves are quite literally run with electricity. Amps is the current, the speed of flow of electricity. A small current int... | [
"url"
] | [
"url"
] |
6k4q9b | Why is it that something that is animated (i.e movie, cartoon, anime), can have different resolution options eventhough it was drawn using computer software rather than shot using a camera? | Technology | explainlikeimfive | {
"a_id": [
"djjkasv",
"djjla6p"
],
"text": [
"Because resolution is the amount of pixels on the screen. Just like movies are shot in 4K, cartoons can be drawn in 4K. The rest is the same. The programs that generate lower resolutions don't differentiate between what the pixels mean, a movie and a cart... | [
"url"
] | [
"url"
] | |
6k562v | Why does the thread count of sheets make them softer? | Technology | explainlikeimfive | {
"a_id": [
"djjfutz"
],
"text": [
"Think of sandpaper... the kind with large grit is rougher than the sandpaper with fine grit. Not imagine the same thing with threads. Fewer, larger threads will be rougher than more fine threads."
],
"score": [
3
],
"text_urls": [
[]
]
} | [
"url"
] | [
"url"
] | |
6k5vvd | Considering how hard disk drives are built, how can they perform multiple write actions at the same time? | Technology | explainlikeimfive | {
"a_id": [
"djjkre1"
],
"text": [
"They can't. They just interleave bits of each write operation really quickly. Remember that hard drives spin very fast, and the read/write head is super quick. See [this video]( URL_0 ) to see what it would look like to write two files at once."
],
"score": [
12... | [
"url"
] | [
"url"
] | |
6k6b6h | What makes Tesla cars special compared to other full electric cars? | Nissan has the Leaf, Chevy has the Bolt. Just googling [electric cars]( URL_0 ) brings up a list of them with some prices going lower than the Tesla Model 3. With all of that said, why can't these other companies generate as much demand or popularity for their electric cars as Tesla does? What makes Tesla special? | Technology | explainlikeimfive | {
"a_id": [
"djjnt6f",
"djjpgfx"
],
"text": [
"Mostly it is range per charge. The eGolf and Leaf have around 80-90miles per charge. The Model3 is like 200 miles. Tesla also has the halo product.",
"Tesla is (relative to the history and volume) of other car manufactures, small. Tesla's auto divisio... | [
"url"
] | [
"url"
] |
6k859b | Why are diesel engines so much louder than normal car engines? | I have cars drive by my house all the time and it is never a problem but when a diesel truck or delivery van go by I can barely hear anything else. Why is that? | Technology | explainlikeimfive | {
"a_id": [
"djk0k59"
],
"text": [
"There are several reasons a diesel is louder. The first is the blowdown event, this is the moment the exhaust valve opens. Diesel engines run at much higher pressures than gasoline, so there's going to be a louder noise as exhaust gasses escape through the port. The pro... | [
"url"
] | [
"url"
] |
6k9nzb | How does a cryptocurrency design itself to be ASIC resistant? | What special programming needs to be done so that it can 'detect' that it's being mined by an ASIC or other specialised device, rather than a general compute device? | Technology | explainlikeimfive | {
"a_id": [
"djkg9g9"
],
"text": [
"> What special programming needs to be done so that it can 'detect' that it's being mined by an ASIC or other specialised device, rather than a general compute device? A cryptocurrency that's been designed to be hard to mine on an ASIC doesn't have a specification that ... | [
"url"
] | [
"url"
] |
6kb992 | Why can't spaceships be fitted with a magnetic field generator to avoid solar radiation? | Technology | explainlikeimfive | {
"a_id": [
"djkpi1c"
],
"text": [
"Generating a strong enough magnetic field to act as a shield has been discussed and theorized about for some time. However, as a practical matter, the power, size and weight requirements for using something like that on a spacecraft- and making it reliable enough for hu... | [
"url"
] | [
"url"
] | |
6kcl98 | My car radio just picked up an apparent telephone call - how the heck did that happen? | Technology | explainlikeimfive | {
"a_id": [
"djl7mr7"
],
"text": [
"They make FM transmitters for cars that don't have AUX Jacks or bluetooth capability. Your car radio probably drove by one of those and it temporarily overrode your radio transmission. I've heard some of the *wierdest* music that way"
],
"score": [
5
],
"tex... | [
"url"
] | [
"url"
] | |
6kcsg7 | What happens to batteries when they stop working? | Technology | explainlikeimfive | {
"a_id": [
"djl30mw"
],
"text": [
"All electrochemical batteries work in more or less the same fashion. At each end of the battery is an electrically conductive electrode. Each electrode is in contact with a liquid electrolyte. Chemical reactions occur at either electrode involving the electrode material... | [
"url"
] | [
"url"
] | |
6ke76z | Why do CFL bulbs turn on almost instantly, but tradition fluoro tubes still need to flicker on? | Technology | explainlikeimfive | {
"a_id": [
"djlo64l"
],
"text": [
"Good question. The design is basically identical to fluoro tubes: A tube containing a mercury vapour, with heated electrodes at both ends. The answer is that the technology has progressed from the old-fashioned switch-start, magnetically controlled systems, and has move... | [
"url"
] | [
"url"
] | |
6keeqi | How do stoplights work? | Technology | explainlikeimfive | {
"a_id": [
"djlh0wz"
],
"text": [
"They are either on a timer or they have magnetic sensors in the asphalt. In areas that don't get a large flow of regular traffic they are usually magnetic sensors so you don't have to sit and wait for a 2 minute light cycle. Lights with timers that are set properly can ... | [
"url"
] | [
"url"
] |
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