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iewx5b
Why do smartphones have multiple cameras instead of using their best camera sensor with multiple lenses?
Top of the line phones have a main camera sensor which is of far higher quality than the other cameras (Tele and wide and sometimes macro). Why not use the main sensor, but have different lenses rotate into place like an old Bolex or and some old two-focal length point and shoots?
Technology
explainlikeimfive
{ "a_id": [ "g2jyev1", "g2kcjs3" ], "text": [ "moving parts makes it more prone to failure. and who's going to rotate the lens? the user or the software? users will forget and get annoyed and the software doing it will cause it to become slow, not to mention the more prone to failure part.", "Mark...
[ "url" ]
[ "url" ]
iey063
If I watch the same video on 720p, 1080p and 4K, what's the easiest aspect to tell the difference between the video qualitiy?
I can notice anything below 720p and Frame rate is something I can pick on but not video quality. I've been trying on Multiple devices for ages and maybe I just don't know where to look at?
Technology
explainlikeimfive
{ "a_id": [ "g2k4ocs", "g2k9qku", "g2k53mk" ], "text": [ "Well for one, it requires your deviance to actually be able to display those ratios. Most can display 720 and 1080, but only relatively newer devices can display 4K, and some new devices still can’t. But since you said you’ve tried multiple...
[ "url" ]
[ "url" ]
if0m2b
What's the difference between Textures, Shaders, Materials, Meshes and Sprites in Unity?
Technology
explainlikeimfive
{ "a_id": [ "g2kj4uj" ], "text": [ "Textures are the image that tells the renderer what colour a particular spot is, it is usually unique to an object, shaders are what tells the renderer what to do with the texture, dictates how light interacts with i,t, reflections and shadows and combigner multiple tex...
[ "url" ]
[ "url" ]
if0q9a
Can't I just vacuum my smartphone charging port?
My samsung charging port won't take chargers due to, what I assume is dirt buildup. I've tried using a tooth pick but that hasn't got it out. Instead of paying $60 to a phone repair company, couldn't I literally just use a vacuum on it? The only parts it could suck out would be the actual charger connector, but that's ...
Technology
explainlikeimfive
{ "a_id": [ "g2kjpv5", "g2kjirh" ], "text": [ "You could try vacuuming, but since the port is basically sealed and not much will happen, compressed air should do a better job, but stay cautious because if you use too much pressure you can break the display from the inside from too much pressure. Also ...
[ "url" ]
[ "url" ]
if0ro4
Why isn't there a (start-up) company that makes older technology printers with cheaper ink?
Technology
explainlikeimfive
{ "a_id": [ "g2kjhfs", "g2kmgrp" ], "text": [ "The ink is costly not because it’s some expensive exotic substance that is the only thing that works on modern printers, it’s actually pretty cheap, but the manufacturer prefer to sell cheap printers at a loss and sell the ink you need to use them at a hu...
[ "url" ]
[ "url" ]
if1e77
why is Internet speed measured in bits per second rather than bytes per second?
Bytes seem like the logical option given everything else in personal computing is given in bytes (ram, storage, file size etc.)
Technology
explainlikeimfive
{ "a_id": [ "g2knf39", "g2koojb", "g2kosfl", "g2knfov" ], "text": [ "Network speeds were measured in bits per second a long time before the internet was even a thing. In the 1970s back then it was beneficial to measure by a larger number - larger numbers mean more accuracies. Also, transmissio...
[ "url" ]
[ "url" ]
if1njr
- Why do our phones sometimes sort of twitch (buzz/flash for a millisecond), before a call actually comes in? What is happening in that moment?
Technology
explainlikeimfive
{ "a_id": [ "g2l41xp" ], "text": [ "I'm pretty confident I've managed to dig up the answer to this, in most (all) processors you have deep sleep states. Where the actual current is cut off from the entire processor cores is effectively offline. This is really advantageous for battery usage, the CPU core i...
[ "url" ]
[ "url" ]
if2l6d
Why are photos on my display always so bad at showing a smooth color gradient, when it comes to very dark - > black?
It's hard to explain, but I've realised that when there's a source of light surrounded by darkness on a picture, the shift from very bright to very dark is quite smooth, while on the outer shift the border to the blackness consists of rough lines and seems kind of pixelated, and the color difference to the lighter tone...
Technology
explainlikeimfive
{ "a_id": [ "g2l2krl" ], "text": [ "Tom Scott did an interesting video on the topic so I’ll link it here if you’re interested URL_0 But a simpler answer is that with 256 shades of red green and blue, only so many of those shades can “represent” black, so those blotchy bands you see are where the color shi...
[ "url" ]
[ "url" ]
if3m1w
What does “Turing-Complete” mean in computer science?
Technology
explainlikeimfive
{ "a_id": [ "g2l44ab" ], "text": [ "Theory of Computation is a bit of a tall subject for ELI5, but the basics are: if you have a bunch of different ways to program a computer (either programming languages, actual hardware, or even mathematical abstractions), are any of them \"more powerful\" than the othe...
[ "url" ]
[ "url" ]
if5nha
Why airplanes loud and clear when we are thousands of feet away on the ground, but can't hear them when we are 30 feet away inside the plane?
Technology
explainlikeimfive
{ "a_id": [ "g2lgrsm", "g2lz5r7" ], "text": [ "The plain has hella insulation. So when the cabin is sealed you cant hear the engines outside. Exactly like how you cant hear a (newer) car engine when inside the car with windows up.", "What airline are you flying that you cant hear it inside? It is ...
[ "url" ]
[ "url" ]
if5veo
If you support a company, does clicking their ads show support or does it charge them money? Same question for skipping them on youtube.
Technology
explainlikeimfive
{ "a_id": [ "g2ljoko", "g2m1vtf" ], "text": [ "Social media manager here: It depends on what platform you see them. On google, it will charge them each time you click the ad. On FB they get charged just for letting you see it and extra for clicking on it but it depends on how the ad is set up. On YT I...
[ "url" ]
[ "url" ]
if91b4
why IP addresses all look the same
I have been trying to learn how to add wifi functionality to my arduino project, and one of the steps involved was to find out the IP address of the wifi module. It was something along the lines of 192.168.0.1, but every IP address I've seen has those same numbers. If there are so many wifi devices everywhere, why do t...
Technology
explainlikeimfive
{ "a_id": [ "g2m41rt" ], "text": [ "192.168.0.0 through 192.168.255.255 are used for what's called a private network (there are other blocks of IPs that are used, but 192.168.\\*.\\* is a popular one). They are not routable on the public internet as they are reserved for the private zone. What this means ...
[ "url" ]
[ "url" ]
if9pol
Why can we upscale video to 4k and even beyond (Nvidia Shield) but cant upscale audio from low bitrate files?
Technology
explainlikeimfive
{ "a_id": [ "g2mbmi5", "g2man8p", "g2mn88b", "g2nkv9z" ], "text": [ "You definitely can. The issue is the same as with upscaled video - you're generally not actually accurately representing the missing data, just making a somewhat good approximation of what the computer thinks should be there....
[ "url" ]
[ "url" ]
ifb0vb
Why renewable energy isn’t dominating the market yet? Wouldn’t a combination of solar/wind/hydro/tidal/geothermal energy suffice at least a big chunk of a country’s consumption?
Technology
explainlikeimfive
{ "a_id": [ "g2mi91n", "g2mhsp5", "g2mieby", "g2ng0lb", "g2nkefj" ], "text": [ "Fossil fuels in many cases are still cheaper than renewable energy. Importantly they are also very reliable and can adapt quickly to demand. We don't have very effective ways to store large amounts of energy so...
[ "url" ]
[ "url" ]
ifgqga
Why do old videos looks so blurry even when we remember them being clear. Is there a way to play them clearly?
Technology
explainlikeimfive
{ "a_id": [ "g2niv6m" ], "text": [ "Your perception of whether something is clear or blurry is based on comparison. Back then, you didn't have HD to compare it to. Based on your frame of reference at the time it would have seemed clear. Also, VHS degrades slightly over time. Probably wouldn't be enough to...
[ "url" ]
[ "url" ]
ifjvwk
How can phones with powerful specs run 24/7 without overheating, while computers need giant fans to cool down?
Technology
explainlikeimfive
{ "a_id": [ "g2o1u6l", "g2o3uho", "g2o4903" ], "text": [ "As powerful as phones are they are nowhere near as powerful as desktop cpus. Desktop cpus dont worry as much about thermals because there is room for a giant fan. Since theres room for it, let's not waste effort designing it to be super dup...
[ "url" ]
[ "url" ]
ifnwcj
We are living in 2020, but movies and TV shows are still not being shot at 60FPS, why?
Technology
explainlikeimfive
{ "a_id": [ "g2onwgn", "g2oo0tg" ], "text": [ "60 fps makes live action film appear almost unreal. It dramatically reduces the \"cinema\" feel that people are used to.", "Movies are just a succession of photographs with sound. But you have to know, when you take a picture : if the photo is taking ...
[ "url" ]
[ "url" ]
ifo4m3
why is it that whenever I need to find something online, there is always a forum from 2001?
Do such forums still exist? Will people in 2040 trying to figure out why their computer screen is flickering find old forums from 2020?
Technology
explainlikeimfive
{ "a_id": [ "g2osf3x", "g2p29ie" ], "text": [ "2001 was the time most websites started to grow, there are many websites, forums and chatrooms from back then, but they just got a different look these days. Some problems may exist way longer than modern websites which means every forum that discussed th...
[ "url" ]
[ "url" ]
ifwh19
If silencers don't supress gunshots as peeps like in the movies. Then why are they used for at all?
Technology
explainlikeimfive
{ "a_id": [ "g2q5pxl", "g2q53gi", "g2q6vwx" ], "text": [ "They reduce the noise about as much as a set of ear plugs will, so they provide hearing safety without everyone around having to stuff things in their ears. Nice to have when shooting in a group, you don't have to worry as much about who ha...
[ "url" ]
[ "url" ]
ifwx2q
Microsoft Monopoly
Technology
explainlikeimfive
{ "a_id": [ "g2q9b3d" ], "text": [ "Windows was on about 95% of desktop computers. Which gave MS a monopoly on desktop OS. That was fine as long as MS did not use that monopoly to its advantage for other software. But windows was shipped with IE but not Netscape. So 95% of desktop computer users had IE au...
[ "url" ]
[ "url" ]
ifzrb0
Console games were developed on PC, but why is it difficult to port them to PC without low rate of bugs?
GTA 4 and Dark Souls 1 are prime examples of this question i’m asking. They are considered by gaming community as one of the worst PC ports ever due to low frame-rate, new bugs and not much setting options to configure
Technology
explainlikeimfive
{ "a_id": [ "g2qrj3h", "g2qs350", "g2rhotb", "g2qsiip" ], "text": [ "There’s fewer variables when you develop for consoles. Let’s say you’re a big game developer. Your work computer is going to be very high end. Console generations only have a few different combinations of hardware specs. The ...
[ "url" ]
[ "url" ]
ig1ysz
What exactly does an "EMP" do?, and how long does it last?
Electro magnetic pulse, I assume it shorts everything out. Does it damage electronics so they will never work again? Thanks!
Technology
explainlikeimfive
{ "a_id": [ "g2r5kbn", "g2r6a5m" ], "text": [ "A moving magnetic field creates an electric field, and vice versa. An EMP is a near instantaneous and powerful burst of an electric and magnetic field that as it passes through objects will induce a current in anything made of metal. Think like a wireless...
[ "url" ]
[ "url" ]
ig7h91
Why are CPU coolers for servers so small?
The consumers side of things are throwing massive monstrosity like the [Noctua D15]( URL_1 ), [Cryorig R1 Ultimate]( URL_2 ), and the enterprise side has these [cute little aluminum blocks]( URL_0 ). And server CPU usually have way bigger TDP than consumer CPU right? Then why are they having smaller heatsink for hotter...
Technology
explainlikeimfive
{ "a_id": [ "g2s4thj", "g2s2zoz", "g2s2eay" ], "text": [ "As others said, noise isn't really a concern in the server world. But also the CPU isn't the hottest thing in a server, these SAS-harddrives are. Plus rack servers already are a perfect wind tunnel, usually air goes in in the front, comes o...
[ "url" ]
[ "url" ]
ig9253
The difference between Rasterization, Ray casting, Ray tracing and Path tracing
Technology
explainlikeimfive
{ "a_id": [ "g2sbq03" ], "text": [ "I’m not an expert (or qualified, really) but here’s the best breakdown I can do: Rasterization is the process of taking a vector image (points in space connected by straight or curved lines to make up a scalable, “infinite” resolution image) and converting it to a bitma...
[ "url" ]
[ "url" ]
ig9pkf
What exactly does incognito browser do?
How incognito does it really make us?
Technology
explainlikeimfive
{ "a_id": [ "g2sdahm", "g2smuet" ], "text": [ "It means that the browser will start a new browsing session and will not record anything during it. This means two things: it will not use identifying information (such as cookies) from your normal browsing session, and any information collected while bro...
[ "url" ]
[ "url" ]
ig9te8
- Why is Linux NOT considered an OS? What the hell is GNU? Among other things
I'm still tryna wrap my head around the concept of Linux, as I just transitioned to it on one of my computers. A lot of people say Linux is an OS like Windows and Mac, but then others refute and say stuff like "no it's a kernel" and then GNU gets mentioned and I'm automatically lost. So if Linux isn't an OS, does that ...
Technology
explainlikeimfive
{ "a_id": [ "g2shf24", "g2se0ni", "g2se7dw", "g2sehbt" ], "text": [ "An operating system consists of two major parts: 1. The kernel, which is the lowest level piece of software in the system. Its role is to control memory and CPU access, and communicate with the various hardware devices in and...
[ "url" ]
[ "url" ]
igcnhc
What happens if you turn off your gaming pc without shutting down properly?
Technology
explainlikeimfive
{ "a_id": [ "g2ssuce" ], "text": [ "Same thing that happens if you turn off a non-gaming PC. The hard drive cache and memory, which require power to store data, do not get a chance to finish writing data to disk. This can result in corruption of data in the hard drive." ], "score": [ 9 ], "tex...
[ "url" ]
[ "url" ]
igdwwo
how laser eye surgery works.
How does slicing someone's eyeball with a laser fix someone's vision?
Technology
explainlikeimfive
{ "a_id": [ "g2t2by6", "g2tmvj9" ], "text": [ "Our vision is based on how the cornea and lens of your eye bends light to receptors in your retina. Instead of a lens replacement, you can cut the cornea and reshape it to a specific measurement and curvature to change the way the light refracts and bends...
[ "url" ]
[ "url" ]
igfma4
how servers in video games work, and what exactly is a server?
When the devs of a game say something like “we’re working on our server issues” what are they exactly working on? And what causes some issues like lag or “lack” of servers for players?
Technology
explainlikeimfive
{ "a_id": [ "g2teseo", "g2teytj", "g2tfjsk" ], "text": [ "A physical server is a computer like any other, but designed and programmed specifically to connect to many 'clients' (the players' computers/games). They're normally quite large, noisy, powerful, and have a very good internet connection. A...
[ "url" ]
[ "url" ]
igi88b
Why does the WiFi seem to rarely go down at work, but go down at home all the time?
There are many many more devices connected at work than at home.
Technology
explainlikeimfive
{ "a_id": [ "g2tuulw", "g2twril", "g2tz97v" ], "text": [ "They are also using much higher end equipment. At home, you probably have a consumer grade router, which is a router/switch/firewall/access point all rolled into a single device that cost maybe $100. At work, they are using _multiple_ discr...
[ "url" ]
[ "url" ]
igjhia
What is the difference between POP3 SMTP and IMAP?
I've been having issues with my phone lately, as I am not able to connect my mail account. After googling the issue, it says to try switching servers between the three. What is the difference and what should I use for my mobile phone?
Technology
explainlikeimfive
{ "a_id": [ "g2u4zyn" ], "text": [ "These are simply different protocols. Think of them as different languages your phone can speak to an email server in. Different servers may speak one or more of them. Since there's a different code base to send the communications back and forth in each (to an extent, t...
[ "url" ]
[ "url" ]
iglf3j
How does HTML5 differ from Flash?
Technology
explainlikeimfive
{ "a_id": [ "g2vfkk8", "g2uhm4j" ], "text": [ "The top answer here does a pretty good job at explaining how they are different from a technical perspective. I'd like to take a different approach and describe how we got to where we are, and why you hear the two in the same sentence so often these days....
[ "url" ]
[ "url" ]
ign8wd
Why special characters like "ò" or "é" aren't allowed in passwords? Doesn't increasing the number of possible combinations make a password more secure?
Technology
explainlikeimfive
{ "a_id": [ "g2uu28s", "g2ur7px" ], "text": [ "This is my first ELI5, I hope I am doing it right. I will try and keep it basic, feel free to ask for more complexity. I have omitted some additional truths about storing passwords for the sake of specifically answering your question. Characters on a comp...
[ "url" ]
[ "url" ]
igo75p
; Why do electronics in general start messing up over time?
if there are no moving parts in electronics and computers can only do what they’re coded to do an nothing more than what makes them slow and buggy over time?
Technology
explainlikeimfive
{ "a_id": [ "g2uxa6f", "g2uwvii", "g2vg5b7", "g2v4e3x", "g2vusrd" ], "text": [ "There is some physical degradation that happens in the electronics: corrosion and heat are two big factors. What you probably are experiencing though is added complexity. As programs and operating systems get m...
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igs5kl
Why do CPUs get so hot, and what is preventing people to make CPUs run cooler? Will there ever be a groundbreaking advancement to allow classical CPUs to run at low temps without fans?
Technology
explainlikeimfive
{ "a_id": [ "g2vp4tq", "g2vsf7m", "g2w1wzo", "g2w1ul4" ], "text": [ "There is a lot going on in such a small chip. There is a ton of currents running all around and microcontrollers moving around, all that generates a lot of heat. The more stress you put on the chip the hotter it gets and if l...
[ "url" ]
[ "url" ]
igva6z
What is volt and Watt???
Technology
explainlikeimfive
{ "a_id": [ "g2w64by" ], "text": [ "Think of rolling a ball down a hill. Volts are how steep the slope is. Watts are how fast the ball is rolling." ], "score": [ 5 ], "text_urls": [ [] ] }
[ "url" ]
[ "url" ]
igvaex
Why was crysis so hard to run?
Im sure we all know of the joke thats been going on for ages, can it run crysis? Was crysis really that hard to run? Was it badly optimized? I have never understood.
Technology
explainlikeimfive
{ "a_id": [ "g2w7qga", "g2w91yt" ], "text": [ "Crysis is a Ferrari as opposed to something like Half Life 2, which is a Toyota Corolla. Crysis is meant to perform, display incredible feats to tease you of the future of gaming. It's isn't great at towing or carrying lots of passengers or groceries. It'...
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igz2ym
How do computers work?
Technology
explainlikeimfive
{ "a_id": [ "g2wr2g4" ], "text": [ "\"How do computers work\" in the context of the body of your post is a really, really, *fantastically* broad question. Before I can start addressing it in a way that's actually responsive, it'd be great if you had one specific topic you had in mind first, and we can bra...
[ "url" ]
[ "url" ]
ih2zlb
Where do deleted files go?
Technology
explainlikeimfive
{ "a_id": [ "g2xh6e1", "g2xh6pi" ], "text": [ "Effectively nowhere. When you delete a file, it simply writes over the \"Header\" which is a piece of information that tells the computer what the file is named, where it is located, how big it is, what format it is... etc. So once you delete that header,...
[ "url" ]
[ "url" ]
ih35sl
How do news websites have scrolling into a new article, with seemingly no refresh between the two?
I was reading about the new [Mafia: Definitive Edition]( URL_0 ) preview build on Forbes (not a preference, just the first link I saw) and as I finished reading about the article, I noticed it went straight into a new one when I scrolled down. The more you scroll, the more articles appear and you can just zoom through ...
Technology
explainlikeimfive
{ "a_id": [ "g2xl63a", "g2xkxue" ], "text": [ "It is done using JavaScript. JavaScript provides a bevy of capabilities; among them it can load data from a server, modify the contents of the page, monitor your scroll position and change the contents of the address bar. What you're seeing is a clever ap...
[ "url" ]
[ "url" ]
ih39gc
Why does the effectiveness of rechargeable batteries that are in phones or laptops for example, deteriorate over time and seem to not be able to hold a charge for the same time?
So for example, if a brand new phone has 12 hours on screen battery life, but a year or so later could barely manage 8 or 9 hours, what causes this?
Technology
explainlikeimfive
{ "a_id": [ "g2xjdpj", "g2xnpe4", "g2yke35", "g2yilrp", "g2yiit6", "g2yi4rp" ], "text": [ "Rechargeable batteries use a reversible chemical reaction. In the normal discharge direction, they release electrons to one side of the battery and we flow those through the device to power it be...
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[ "url" ]
ih44a8
How does your phone know when it needs to rotate to the side?
Technology
explainlikeimfive
{ "a_id": [ "g2xoygu" ], "text": [ "Each phone has a sensor inside called an accelerometer and a sensor called a gyroscope. These sensors detect tilt and orientation and your phone screen rotates depending on the reading from the sensors." ], "score": [ 3 ], "text_urls": [ [] ] }
[ "url" ]
[ "url" ]
ih9xvt
What is the difference between a wifi router and a modem? What is LAN and WLAN? What are packets? What is ethernet?
Technology
explainlikeimfive
{ "a_id": [ "g2yvi4r", "g2yvw20", "g2ze74g" ], "text": [ "- A modem transforms analog signal (the one in the cable that arrives to your house) into digital signal. Your wifi router is probably a modem as well. A wifi router is what lets you connect wirelessly to the network. - LAN is a network of ...
[ "url" ]
[ "url" ]
ihc0t1
In the USA, why do emergency broadcast warnings sound like absolute garbage? It’s usually a robotic sounding voice that sounds like they are reporting from the middle of a static storm. Why is there so much extra noise in these recordings?
I’m referring to the actual message, not the warning tones at the beginning. :)
Technology
explainlikeimfive
{ "a_id": [ "g2zdvzg", "g30k4nh", "g2zrgs4", "g30f0kl", "g30w2ws", "g30uu7r", "g31o0h3", "g31f0t9", "g319dgt", "g31clzt", "g30txx8", "g30uq9s", "g31laoy", "g326me2" ], "text": [ "The Emergency Alert System (EAS) functions like ripples in a pond. The aler...
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[ "url" ]
ihepnr
Website Tracking
Using an apple computer, with cross site traffic blocking and cookie blocking, and using duck duck go as a browser, how do websites still know so much information about you? Not only how many times you have been to their site, but also your zip code? How can you be more anonymous?
Technology
explainlikeimfive
{ "a_id": [ "g2zrah6" ], "text": [ "Imagine you're sending a letter to someone requesting a package you want sent to your address. The mailman is like your ISP. The person you're requesting a package from is like the web server. The package is like the website, and your street address is like your IP addr...
[ "url" ]
[ "url" ]
ihgas4
How do they grab old film and turn it into a high quality frame rate?
As the text implies, It baffles me how much quality theyre able to add to old films.
Technology
explainlikeimfive
{ "a_id": [ "g303iys" ], "text": [ "Old film can be converted to HD pretty easily, but here’s the thing: not *all* old film. Back in the dawn of projection technology, video was captured on a transparent film of silver halide crystals. These crystals would darken significantly if exposed to any amount of ...
[ "url" ]
[ "url" ]
ihgexe
Do megabytes, gigabytes, terabytes, so on and so forth carry on any weight?
Even if it’s minuscule, do they carry any weight to them?
Technology
explainlikeimfive
{ "a_id": [ "g300obj" ], "text": [ "That depends on how they are implemented. They can be said to have e. g. the weight of the electrons trapped in memory cells for modern computer. However, it then depends on their value, since zeroes will not have these trapped electrons. In HDDs, data is not stored in ...
[ "url" ]
[ "url" ]
ihh665
Why is it so hard to put the phone down?
Technology
explainlikeimfive
{ "a_id": [ "g305vmi", "g307tax" ], "text": [ "Dopamine, the reward chemical. Your brain anticipates release of dopamine following certain activities(eating and sex are the two biggies) and drives you to seek out those activities. Social media hijacks that mechanism, so do addictive drugs. URL_2 URL_1...
[ "url" ]
[ "url" ]
ihhpzn
Why does an external hard drive have varying space depending on the device it's used with?
ELI5: Today I cleared an external hard drive to use it as extra storage on my PS4. While setting everything up I noticed that on my windows laptop it showed about 900 GB of available space (while being completely empty). On the Playstation it now shows I have about 1,4 TB of available space. How is such a big discrepan...
Technology
explainlikeimfive
{ "a_id": [ "g308avu", "g30o1m2", "g30gd0d" ], "text": [ "The usual culprit in those cases is Microsoft's confusing way of reporting space - Windows may *display* \"GB\" and \"TB\", but what it actually reports is GiB and TiB. Your discrepancy however is too large to be solely caused by this. Are ...
[ "url" ]
[ "url" ]
ihlvdl
How do live lightning websites work?
Technology
explainlikeimfive
{ "a_id": [ "g31by4i" ], "text": [ "Electrons moving around create electromagnetic waves, that's basically how an emitting antenna works. Lighting, being a large discharge of electrons, has the same property, and as such each strike creates a fairly large electromagnetic pulse, which travels hundreds of k...
[ "url" ]
[ "url" ]
ihohpj
why is there a lag during communication between on-site news reporters and off-site reporters despite of all the technological advancements?
Technology
explainlikeimfive
{ "a_id": [ "g31fy4d", "g31feap", "g32co9f" ], "text": [ "Short version: speed of light is finite. In order to provide a guaranteed high-bandwidth pipe (we'll come back to this) between the on-site reporter and the studio, you need a satellite link. That's what those vans with big dishes on a pole...
[ "url" ]
[ "url" ]
ihrh1c
Why do non-backlit screens (such as most Gameboy screens) need bright surroundings in order to be seen, while backlit screens (such as your phone) need more "backlight" if it is in the same conditions?
Technology
explainlikeimfive
{ "a_id": [ "g31zrik", "g3258hi" ], "text": [ "You kind of answered your own question there. Non-Backlit screens don't have a light coming from behind the screen to enable you to see what's there. Screens with a backlight, do have that light. What's important to remember though is that what's on the s...
[ "url" ]
[ "url" ]
ihs9wj
Why are movies always in 24fps?
I'm so curious as to why they are always in 24fps. Games under 60fps tend to get choppy, but movies tend to look fine at 24fps. How?
Technology
explainlikeimfive
{ "a_id": [ "g3257j5", "g325i21" ], "text": [ "Games render entire pristine frames with no motion blur. You need a lot of pristine images fast one after another to look smooth. Movies are recorded at 24 FPS and then played back at the same frame rate. This means that whatever motion blur they pick up ...
[ "url" ]
[ "url" ]
ihu35t
What’s the difference between a fast shutter speed on a photography camera and just recording the event on a video camera?
Like why don’t sports photographers just use video cameras and pause at the best spot, instead of take multiple still shots? Isn’t video footage made up of many many still shots anyway? This way they can’t stop too early or start too late.
Technology
explainlikeimfive
{ "a_id": [ "g32hv2x", "g32i5kp" ], "text": [ "Great question... High speed movement requires VERY fast speeds to capture the movement and make it clear when shown as a single shot. Video at the movies is 24 frames per second. High definition 4k video are faster between 30 or 60 frames per second So o...
[ "url" ]
[ "url" ]
ihv1jz
how does Netflix censor a video while screen recording by making it black only in the recording as you continue watching the video?
Technology
explainlikeimfive
{ "a_id": [ "g32rz0z", "g32sjo3" ], "text": [ "Pretty sure you can code specifc parts of your webpage(in this Case the videofeed) to ne not picked up by screen recording softwares. These parts then have some sort of attribute that tells the recording software to black out the information. Ob This of c...
[ "url" ]
[ "url" ]
ii0lpc
How come the xray machines officers use in airports don't harm the workers? (Like how doctors stand in another room for their protection)
Technology
explainlikeimfive
{ "a_id": [ "g33q4ke", "g33qy4h" ], "text": [ "Notice the massive metal lined flaps on the conveyer to the massive metal box that houses the x ray. All of that is there to protect everyone, it shields against the x rays.", "The effective dosage from a medical scan is much higher than for any airpo...
[ "url" ]
[ "url" ]
ii3leh
How do chess engines calculate moves?
How do they figure out which move is winning and how can they make mistakes if they calculate everything?
Technology
explainlikeimfive
{ "a_id": [ "g348joe" ], "text": [ "Game theory is a big part of chess. It's figuring out if I do move \"w\", my opponent will probably do \"x\", and I can respond with \"y\", and then they'll do \"z\", and so on. Expert chess players are always looking well beyond just their next move, and computers are ...
[ "url" ]
[ "url" ]
ii3xa9
How does a Turing machine work?
Bonus points for using the least amount of words possible.
Technology
explainlikeimfive
{ "a_id": [ "g34axdj" ], "text": [ "A Turing machine is not a real concrete thing, but a theoretical computer. It has an infinitely long tape with discrete cells. It's given the input on these cells. A \"programmer\" gives it instructions to read and write data in these cells to solve some sort of mathema...
[ "url" ]
[ "url" ]
ii62bg
How are lines on roads painted so consistently and accurately?
Technology
explainlikeimfive
{ "a_id": [ "g34m8jj", "g34lllw", "g34m61e", "g34oqe4" ], "text": [ "The trucks that paint the dotted white lines on the highways have an automated sprayer that's connected to the speedometer of the truck. That way it can calculate that for a given speed, the sprayer needs to run for X amount ...
[ "url" ]
[ "url" ]
ii7ng3
If it's true that you can't "truly" erase anything on the internet, then how does one go about obtaining all that information back that was deleted? Where does it all get saved?
Technology
explainlikeimfive
{ "a_id": [ "g34w198", "g34wrsq" ], "text": [ "The idea is that if you ever publish anything on the internet, then anyone can grab a copy of it for themselves and possibly share it later themselves. So even if the data is technically erased, it's still potentially *out there*.", "It's not that inf...
[ "url" ]
[ "url" ]
ii8ps7
Why do chair massagers and other related equipment say to only use them for 15 minutes or less?
Technology
explainlikeimfive
{ "a_id": [ "g35558r" ], "text": [ "Electric motors have something called a \"duty cycle\" that says how much of the time they can be on before they need to stop to cool down. A 100% duty cycle motor can run continuously, under load, but that usually requires a pretty robust motor and, crucially, a good c...
[ "url" ]
[ "url" ]
ii9m74
Led Vs Lcd vs Oled vs Amoled
Technology
explainlikeimfive
{ "a_id": [ "g35bvi5" ], "text": [ "LCD is a technology where the screen light comes from a few lights behind the pixels which are always on so even if the image is supposed to be black it still makes some light and it's not that black. LED refers to a kind of LCD technology where they use LEDs to produce...
[ "url" ]
[ "url" ]
ii9qm8
Why do many audiophiles store lossless music even though it's supposedly the same as 320kbps MP3 to the human ear?
EDIT: What I've gathered from the comments so far is that the higher frequencies getting cut off doesn't matter but the lower audible frequencies also get distorted on MP3. Supposedly, that's where the extra quality in lossless lies. Also it matters when you EQ audio. Is that all? YMMV, but I cannot hear the difference...
Technology
explainlikeimfive
{ "a_id": [ "g35bbiz", "g35kcth", "g35bqd5", "g35hm3y", "g35mgan", "g35gjkw", "g35v3yh" ], "text": [ "* Technically it's not the same because using the MP3 format removes information from the original recording. * Also many of them believe it's possible to hear the difference. * Bu...
[ "url" ]
[ "url" ]
iibrcg
How do animators make cartoons that can go up to 30 frames per second in the limited time they are allowed?
There must be some trick to it. I couldnt believe that animators actually slave there for days on end drawing each and every frame with body parts and mouths moved ever so slightly different. That they can do that thirty times for every second for a thirty minute to hours long video. It just seems impossible!!
Technology
explainlikeimfive
{ "a_id": [ "g35ni7e", "g35p9ez", "g35p229", "g360zb7" ], "text": [ "Modern animation is largely done with computers with significantly reduces the time and resources it would take to develop longer cartoons. Hand drawn animations are fairly rare nowadays.", "Old-school animation, the type...
[ "url" ]
[ "url" ]
iichfc
How does bionic hand work? If they don’t have any fingers on hand, how they control the hand? like grip and move and all. I just saw a video with little girl that uses bionic hand for firs time and i wonder how it works.
Technology
explainlikeimfive
{ "a_id": [ "g35sxqq", "g35t3pd" ], "text": [ "The muscles the control your fingers opening and closing are actually all in your wrist! Only those super fine motor control movements are controlled by small muscles in your hand. So, the bionic is then tied into those existing muscles in your wrist that...
[ "url" ]
[ "url" ]
iig4i1
-How do big games get coded
Technology
explainlikeimfive
{ "a_id": [ "g36hfy6", "g36hys6" ], "text": [ "A ) Good planning and compartmentalization. A big project is more or less designed before anyone writes any code. People will work on the ground features first and then build from there, and have frequent meetings and open communication to make sure every...
[ "url" ]
[ "url" ]
iiiy5n
why haven't auto makers developed a warning system for infants left in hot cars?
Technology
explainlikeimfive
{ "a_id": [ "g36zhg6" ], "text": [ "Seems entirely too specific for a default addition to a vehicle. Also, people shouldnt need to be reminded of their CHILD. Some people shouldnt have kids." ], "score": [ 5 ], "text_urls": [ [] ] }
[ "url" ]
[ "url" ]
iiku36
how do reviews get the phones and other electronics and some tear it apart , do they really buy?
Technology
explainlikeimfive
{ "a_id": [ "g37cegv" ], "text": [ "Known and popular reviewers are often sent the product for free (or with conditions of return) on the agreement that they do a review and publish it. Some retailers are honest and know a decent review will come because they made a good product. Some give away expensive ...
[ "url" ]
[ "url" ]
iip07n
Why are there no USB-C hubs with lots of USB-C ports for USB-C devices, in the style of old school USB hubs?
Technology
explainlikeimfive
{ "a_id": [ "g38c4sm", "g38uok2" ], "text": [ "There are: [ URL_0 ]( URL_1 ) But generally if you have USB-C you also want a couple of USB-A's. They're evolving but I've only just moved everything I have to USB-C myself and even then I bought a powerbank which has USB-A charging and delivery as well a...
[ "url" ]
[ "url" ]
iist3a
How exactly does data compression work?
Technology
explainlikeimfive
{ "a_id": [ "g38ur3m" ], "text": [ "There are several techniques. The simplest technique is to replace repeats of the same character with a single one and the number. So aaaabbbbccc would be replaced with 4a4b3c. This is not useful for English text (where we don't really get repeats like that) but it's us...
[ "url" ]
[ "url" ]
iit3j7
if Whatsapp don't run ads and don't require a subscription. How do they generate money?
Technology
explainlikeimfive
{ "a_id": [ "g38vidk", "g38w4at", "g39027j", "g38tpha", "g38ulk9", "g392uzv" ], "text": [ "It doesn't currently make money. It used to cost a small amount of money to buy the app itself and was intended to be a subscription service. Now Facebook have acquired it and are positioning it ...
[ "url" ]
[ "url" ]
iitjis
Why can’t a camera sensor have variable sensitivity across for a given image?
Technology
explainlikeimfive
{ "a_id": [ "g38weh0", "g38v2jw" ], "text": [ "The ISO isn't the voltage the sensors are at. It's how far the amplifier at the end is turned up. High ISO = the \"volume\" knob on the amplifier is high. The thing is there is usually only one or a few amplifiers for the whole sensor. If you have multipl...
[ "url" ]
[ "url" ]
iiu3vf
Why are magazines in some weapons behind the trigger?
Now, I don't have any experience with weapons in real life or anything like that. Though, I have noticed that some weapons like the AUG have their magazines behind the trigger and other weapons like the M16 have their magazines in front of the trigger. To me (keep in mind, I don't have experience with weapons), the AUG...
Technology
explainlikeimfive
{ "a_id": [ "g38x3sl" ], "text": [ "That's what's called a bullpup design, where the whole action is behind the trigger. It allows you to have a full length barrel while reducing the weight and length of the weapon, thus improving handling. It is slightly more awkward to reload, but the advantages outweig...
[ "url" ]
[ "url" ]
iiwsh1
Why is it so easy to teach a bot to write entire articles that pass the Turing test, but even the best bots become obvious in just a few chat messages?
Technology
explainlikeimfive
{ "a_id": [ "g39k3r9" ], "text": [ "When you write an article, whether it's yourself or a robot doing so, that article is ultimately placed in a context. It has a topic. It has a format. You know, and you can teach your robot, what things make sense in that context and what things don't. If your article i...
[ "url" ]
[ "url" ]
iix4ty
What are WASAPI, ASIO, and Direct Sound ?
I'm exploring sound virtualization on Windows 10 and have noticed that a lot of the user guides for different programs mention "WASAPI" , "ASIO", "Direct Sound", "pins", "KS", etc. What do these all mean? Are they options that I can enable for better audio playback?
Technology
explainlikeimfive
{ "a_id": [ "g39mlks" ], "text": [ "They are different audio API's for programmers to use, when they want to make windows play some audio. So no, they won't change your audio for the better." ], "score": [ 3 ], "text_urls": [ [] ] }
[ "url" ]
[ "url" ]
iizs8m
How can millions of people use the ~400 underwater cables for internet simultaneously?
I'm aware each cable is branched into many many smaller cables but surely there still can't be one cable per person so how is the issue of overlapping data signals solved?
Technology
explainlikeimfive
{ "a_id": [ "g3a52oq", "g3b0sn0", "g3a5e6a" ], "text": [ "There isn’t one cable per person. Many (many many many) people are taking tiny slices of transmission time in turn. In addition, if it’s a fiber optic cable, you can run multiple light beams down one fiber and they won’t interfere with each...
[ "url" ]
[ "url" ]
ij1vy9
What goes the gigahertz (ghz) actually mean in terms of a computer processor, and how does that translate to actual performance?
Technology
explainlikeimfive
{ "a_id": [ "g3an9gm" ], "text": [ "Your home clock probably makes a tick. That tick happens once per second. We also call this one hertz. If it were to be fast and tick twice per second, we could call that 2 hertz. A gigahertz is 1 billion of something per second. In this case, 1 billion cpu ticks per se...
[ "url" ]
[ "url" ]
ij47ic
- Why have blimps not made a comeback, especially in the way of public transportation?
I was reading up on blimps and they seem to have a ton of untapped potential. They are actually super safe, could be built for a reasonable price, and can carry a large number of people. So, why haven't they made a comeback? On a city public transport level, they could make a massive impact on traffic reduction etc.
Technology
explainlikeimfive
{ "a_id": [ "g3b45jl", "g3b3hm3", "g3b3y06" ], "text": [ "The 2 lighter than air gases commonly used for blimps have major drawbacks. * Hydrogen - Highly combustible. * Helium - Has other uses for which there are no viable alternatives such as cooling the magnets in medical CAT scanners and superc...
[ "url" ]
[ "url" ]
ij6ooc
what is posix in Linux? Read multiple articles, not understanding.
Technology
explainlikeimfive
{ "a_id": [ "g3bn8nm" ], "text": [ "Posix is a bunch of standards about how operating systems should work if they want to be compatible. An operating system is the basic computer program that \"runs\" a computer; it's what supports all your applications and lets other programs actually work with the compu...
[ "url" ]
[ "url" ]
ij80d7
Why do we need to buy new phones for increased mobile internet speeds like for 4/5G.
Our phones are powerful enough for advanced 3D graphics and WiFi has existed for awhile that is capable of vastly superior speeds yet our phones can't receive data faster without buying a new one?
Technology
explainlikeimfive
{ "a_id": [ "g3bt369", "g3btupd", "g3bwyyk" ], "text": [ "Your phone lacks the radio bands that new technologies use. Look back at the first gen LTE bands till now and you’ll see additional frequencies in newer phones.", "The modem is a physical chip- not a software payload like HTTP. Every ge...
[ "url" ]
[ "url" ]
ijagjr
How are bitcoins created?
I know it takes mathematical knowledge, but i dont exaclty know how they work and how exactly a equation can be some type of currency, im five help
Technology
explainlikeimfive
{ "a_id": [ "g3c8ztk" ], "text": [ "So, if we skip over all the complicated math bit all Bitcoin boils down to is a distributed ledger: a list everyone can have a copy of that goes \"Bill pays Sally five bitcoins. Sally pays Joe three bitcoins. Mary pays Bill eight bitcoins\". By looking over the list you...
[ "url" ]
[ "url" ]
ijap6v
How did someone figure out a bunch of 0s and 1s (binary code) could be used to make the computers and phones we all use today?
I understand that you write code to run a program but how did someone figure all that out in the first place?
Technology
explainlikeimfive
{ "a_id": [ "g3caf0k", "g3cbipt", "g3cgh2w", "g3ct4su", "g3cg5uf", "g3cqszp" ], "text": [ "[The ones and zeros were invented in the early 1800s]( URL_0 ) as a part of [Jacquard loom]( URL_1 ), which was a way to weave patterns into cloth. A cloth has a warp (vertical threads) and a wef...
[ "url" ]
[ "url" ]
ijayuy
what is Cloudflare? Why is it so integral to games, and why do so many sites/services use it?
Technology
explainlikeimfive
{ "a_id": [ "g3cdhh4", "g3cbgi5" ], "text": [ "Think of it like going to the one fruit store to buy some food. You really want apples so you buy a small bag. Now let's say someone else wants to buy apples so they also go to the store. If too many people try to get apples the store will run out! What i...
[ "url" ]
[ "url" ]
ijc779
What happens when you don't unplug the charger from a device after it reached a 100%? Can it overcharge? Will something bad happen?
Technology
explainlikeimfive
{ "a_id": [ "g3ckz6w" ], "text": [ "No, if the device is designed like it should, the charging automatically stops when the battery is full and the device runs from the charger directly so the battery doesn’t discharge" ], "score": [ 4 ], "text_urls": [ [] ] }
[ "url" ]
[ "url" ]
ijejap
Why are there still "business days" for online transactions when just about everything is done automatically by programs?
Technology
explainlikeimfive
{ "a_id": [ "g3d9dgt", "g3d3tct", "g3djzoh", "g3er8tg", "g3ebx3t", "g3eiey5", "g3etimc" ], "text": [ "Actual files (pretty much excel files) are transferred between banks and even though most parts of that process is automated there are still manual components to it. There are also...
[ "url" ]
[ "url" ]
ijg05n
Why do most BIOS look so dated compared to your actual OS?
Technology
explainlikeimfive
{ "a_id": [ "g3dexka" ], "text": [ "TLDR: Because hardly anyone goes into the BIOS, it's not a daily part of maintaining your PC, so there's not much of a point spending all that time and effort to make it look pretty. Older BIOS's had to fit on a single chip and were rarely used for anything other than v...
[ "url" ]
[ "url" ]
ijg8je
How do one-way mirrors work?
Technology
explainlikeimfive
{ "a_id": [ "g3dgx7w", "g3dh1gq" ], "text": [ "A little bit of physics and a lot of marketing. One-way mirrors are just partially reflective mirrors. They let some percentage of light through and they reflect most of the rest. They do this equally in both directions, which the laws of physics are actu...
[ "url" ]
[ "url" ]
ijgvxc
Why does internet explorer have such a bad reputation with tech-savvy people? Average users seem to have no problem with it.
Technology
explainlikeimfive
{ "a_id": [ "g3dlxt4", "g3dlsdx", "g3dlx71", "g3eql70", "g3dmzul" ], "text": [ "Here's just a few of the more common reasons. 1) It's had a history of security issues over the years resulting in people getting infected with viruses. Since microsoft typically only issues updates once a mont...
[ "url" ]
[ "url" ]
ijmamn
Why do games running on emulators still have the same performance issues as they had on their original console?
Today I decided to get a NES emulator on my laptop, which already is an old machine. I decided to play Mega Man, a game I actually own, and I could not help but notice that this game, launched in *1987* for the *Nintendo Entertainment System*, has the same visual glitches and performance issues you would expect from pl...
Technology
explainlikeimfive
{ "a_id": [ "g3eqf7r", "g3erodh", "g3fmvfk", "g3etavo" ], "text": [ "Because it emulates the original hardware, including it's limitations and speed, and every bug, glitch, and whatever else. It actually takes quite a bit of processing power to emulate chips in software. The emulator actually ...
[ "url" ]
[ "url" ]
ijnpba
How does smoke damage electronics? Can you clean it?
My house was damaged in a fire, and I was told by the team that's overseeing the repairs that any electronics in the house will likely be documented by an insurance claims adjuster and added due to "smoke damage". If I'm understanding it correctly, I'll be permitted to keep everything regardless of the fact that it was...
Technology
explainlikeimfive
{ "a_id": [ "g3f3kg1" ], "text": [ "Three things happen. There's a film the forms which insulates parts that are not meant to have insulation and can cause resistance to the flow of electricity. The second thing is smoke has a electrical charge which can cause electrical shorts. The third thing is soot wh...
[ "url" ]
[ "url" ]
ijphrn
How can I tell if a post on social media is from an real individual person or a spam account that is planning on manipulating me?
Technology
explainlikeimfive
{ "a_id": [ "g3fc437", "g3fd0j0", "g3fbp1g" ], "text": [ "You can't. Just don't accept everything you are told as fact. It's nothing new, it used to be called yellow journalism.", "Grammar is a big indicator along with spelling and punctuation. Also if they ask how you're doing, then immediate...
[ "url" ]
[ "url" ]
ijqdud
why does your phone battery die so much faster when using the camera vs normal apps (texting, email, etc)?
Technology
explainlikeimfive
{ "a_id": [ "g3fhqfu" ], "text": [ "The phone has a new piece of hardware to power and the camera module or modules tend to be a very power hungry component. This leads to the the battey dying faster than it would normally. Believe or not the camera image processing also takes alot of power from the other...
[ "url" ]
[ "url" ]
ijrjj1
How does WhatsApp as a company make money even though there are no ads on whatsapp?
Technology
explainlikeimfive
{ "a_id": [ "g3fpl0o", "g3fpo6s", "g3fqcij", "g3fv20i" ], "text": [ "Message and call flow metadata is valuable. Who chats with who can help you understand social groups, purchasing patterns, etc. Facebook, who owns WhatsApp, benefits from this data and can sell more", "What’s app used to ...
[ "url" ]
[ "url" ]
ijtm84
What does refreshing a web-page do exactly?
Technology
explainlikeimfive
{ "a_id": [ "g3g0t9o" ], "text": [ "It asks the server to send the page again. If the data has been updated since you first opened the page, then it will send you the updated data. Sometimes if there are network issues, parts of the page might not be received by the browser, so refreshing makes sure the s...
[ "url" ]
[ "url" ]
ijvcxd
What is a WEP key?
is a wep key the same as my wifi password? the reason i’m asking is because i’m trying to play my 3DS. thanks in advance.
Technology
explainlikeimfive
{ "a_id": [ "g3ga9pw", "g3ga106", "g3ga8u6" ], "text": [ "It stands for Wired Equivalent Privacy. It's a really old way of putting a password on your wifi. The key would scramble up stuff so only your router could figure it out. Thing is people figured out a way to unscramble it, so the guys who m...
[ "url" ]
[ "url" ]
ijvg8h
What do spoilers (on cars) actually do, and how?
Technology
explainlikeimfive
{ "a_id": [ "g3gb82d" ], "text": [ "People often confuse spoilers and wings which both are aerodynamic devices on cars to improve performance. But they have very different ways of working. A spoiler is designed to direct air into the void that forms behind the car. By directing air into this void the pres...
[ "url" ]
[ "url" ]
ik119p
Why do analog thermometres take 5 minutes to measure, while a digital one can do it in seconds?
Technology
explainlikeimfive
{ "a_id": [ "g3hhejc" ], "text": [ "It takes time to transfer heat from your body, through glass, into mercury to the point it is about equal to your body temperature. Digital thermometers work faster because the bits you heat up with your mouth are smaller and change faster allowing for faster readings."...
[ "url" ]
[ "url" ]
ik26b6
How do we record (and play sound)? I don’t know what is done to allow us to record and re-play audio
Technology
explainlikeimfive
{ "a_id": [ "g3ho7vm" ], "text": [ "It's actually a really interesting inversion of speakers! Speakers use electricity to move magnets, and that magnet moves a diaphragm, and shaking that diaphragm will shake the surrounding air, causing sound waves. Microphones have a diaphragm too. When sound waves hit ...
[ "url" ]
[ "url" ]
ik3mtc
Why do updates go from something like 9.04.32 to 10.58.7?
Technology
explainlikeimfive
{ "a_id": [ "g3i097h", "g3i4qb3", "g3i0ea4", "g3i0vva", "g3i49x6" ], "text": [ "Software versioning follows a fairly uniform scheme that tracks revisions based on their significance to the program. The gap in the revision numbers you're seeing is the internal revisions and changes that sof...
[ "url" ]
[ "url" ]
ik4dak
what makes RAM faster if there are no moving parts?
Technology
explainlikeimfive
{ "a_id": [ "g3i6xyc" ], "text": [ "RAM is faster *because* there are no moving parts. Compared to a hard drive RAM operates at much high speeds mostly because it doesn't have to wait for seek time, which is the amount of time need for the drive to rotate and the hammer to move to the correct position. Di...
[ "url" ]
[ "url" ]