Recent comments in /f/explainlikeimfive
lil_kreen t1_jacoima wrote
Reply to ELI5: How can a 100GB game get an 80GB update and still be about the same size afterwards? by MissAJHunter
For the same reason that replacing the engine in a car does not make the car larger. Some games can't do binary patching because of the nature of their randomly packed data files makes the entire pack change. So they have to replace the entire data store instead of just inserting a new version of a specific file.
its-a-throw-away_ t1_jaco3b8 wrote
Reply to comment by TheSeyrian in ELI5: Why is skin considered an organ? by PapaMamaGoldilocks
Nice.
Deep_Sky478 t1_jacnmgt wrote
Reply to comment by Deep_Sky478 in ELI5: why do dental visits in 🇺🇸 cost insured patients so much compared to medical visits? by FirstAd6848
It's also very easy relatively to ruin your teeth. If you get 15 cavities thats 15 procedures to fix it. It gets expensive fast. Prevention is super important and infinitely cheaper.
amor__fati___ t1_jacnes4 wrote
Reply to comment by rubseb in Eli5 why do stairwells need to be have two flights in a spiral to go up one floor when escalators can just use the one flight going straight up for the same distance? by exmxn
Not correct. If you look at how escalators work (eg 3D animations), the step height is a variable that can be completely varied through the length of the escalator. So it can start flat, go up a flight, go flat again, go up again etc very easily and still be the same escalator. It works so simply it is amazing.
Deep_Sky478 t1_jacnd09 wrote
Reply to ELI5: why do dental visits in 🇺🇸 cost insured patients so much compared to medical visits? by FirstAd6848
Dental insurance isn't insurance. Think about your car insurance. It has a deductible, say $1000, and after that you don't have to pay anything to get the rest of your car covered if you have an accident. The maximum you pay is $1000. Health insurance is the same. Dental "insurance" is backwards. It usually covers UP TO $1000-1500. So if you need something simple done you don't pay anything. If you need a $40k set of implant dentures you're on your own. Dental insurance is quite literally the opposite of insurance.
The rate of coverage also used to be higher. Crowns on average now are $1200ish, they used to be $700 a decade or two ago, but insurance hasn't budged.
MissAJHunter OP t1_jacn7z8 wrote
Reply to comment by LondonDude123 in ELI5: How can a 100GB game get an 80GB update and still be about the same size afterwards? by MissAJHunter
I had to think about something while I was waiting I guess.
manofredgables t1_jacn468 wrote
Reply to comment by Flapflapimabird in eli5 perpetual motion is impossible but why haven't we made something that just goes on for a really long time that we then service so it can keep going? by FrozenKyrie
>When this electromagnet is charged, it is magnetic, and when you attach an iron bar across the poles of this electromagnet, it will not lose its energy.
Yes it will. The magnetic field generated by the electric current will collapse, but to whatever extent the iron bar was magnetized there will be some remaining. It can no longer be considered energy, however, it's just a magnet.
>The iron bar is shown by fedora guy (another YouTuber idk what his handle is) to last at least 2 years,
Sure. Permanent magnets are just that, permanent.
>and when an LED is connected across both poles, when the iron bar is pulled off, it both loses its magnetic charge and lights up the LED momentarily.
This is no mystery. That is the basic principle of a generator. Apply a changing magnetic field to a conductor, and electrical current is produced. Since you are removing a permanent magnet from an iron core, you are suddenly lowering the magnetic field from the conductor's vicinity.
If it loses any magnetism(it won't lose all of it), it's due to hysteresis loss. This is to be expected with soft iron which easily gets both magnetized and demagnetized. It's a real headache in transformers.
>There is a discharge of magnetic energy. The energy goes somewhere.
No, there is not. There is a conversion from the kinetic energy(removing the iron bar), into magnetic energy(suddenly changing the flux), into electrical energy(as the field has nothing to sustain it, it is "absorbed" into the conductors), and finally a sheer inefficient loss of potential energy as the fragile magnetizing of the iron bar goes down. That is lost as minor heat in the iron bar.
Nothing remotely interesting has happened in this sequence. Take that horseshoe transformer thing and attach a proper neodymium magnet instead of the iron bar and you'll see quite a bit more power when it's removed.
Or better yet, put the magnet on a rotating thing so that you repeatedly spin it past the horseshoe! Oh wait... That's a normal generator.
[deleted] t1_jacn39v wrote
cmlobue t1_jacn1lr wrote
Reply to comment by rubseb in Eli5 why do stairwells need to be have two flights in a spiral to go up one floor when escalators can just use the one flight going straight up for the same distance? by exmxn
Two flights of 10 steps are not significantly more expensive than one flight of 20 - all you're adding is the landing. Two escalators means twice the mechanical equipment.
Drizzt893 t1_jacmozq wrote
If you watch interviews with people that spent time with hunter gatherer tribes that still exist today, you'll see that they don't really have stress like we do. They are just happy people. They can't imagine why anyone would ever hurt themselves or unalive themselves. The reason we're all stressed is that we were not designed to worry about modern day problems.
[deleted] t1_jacmhsk wrote
Tomi97_origin t1_jacmhqv wrote
Reply to ELI5: How can a 100GB game get an 80GB update and still be about the same size afterwards? by MissAJHunter
There are multiple ways of how to make updates.
One is to just download a list of changes and apply them locally on the existing files, but this can fail if someone tinkered with them.
Second is to just download the whole file and replace the already existing one. This takes more time and data, but it guarantees success.
In your example they choose second method. You download 80GB update and that will replace 80GB of your game.
nmxt t1_jaclx2i wrote
We are bad at dealing with the chronic stress of working/commuting every day, having not enough sleep every day, seeing scary news every day etc. We are good at dealing with the acute stress of dangerous situations that last for minutes, not weeks, months and years.
A_Meal_of_Pain t1_jaclt8d wrote
Look at animals in captivity in general. Even when all of their needs are taken with, many of them cannot deal with the stress of unusual environments.
Humans are not bad at dealing with stress. Humans create these scenarios that actually lead to us having a lot more stresses than most other animals come up and for the most part we deal with those scenarios fairly well. We are actually super adapted to dealing with stress compared to most organisms.
kinyutaka t1_jaclj18 wrote
Reply to comment by ScienceIsSexy420 in ELI5: What's hard about copying photosynthesis or just using plants for power by No_Dust_5360
I am not trying to say that it isn't worth trying. Only that it is clearly not good enough for mass market.
UntamedStream t1_jacl37e wrote
Reply to comment by TheRealSmallBean in ELI5: Why is it that when fertilizers make their way into waterways, all the oxygen disappears, killing the fish? by Psychological-Dog994
Yes! This is something that is also taught in schools nowadays (at least here in Finland)
thisusedyet t1_jackchj wrote
Reply to comment by Gnonthgol in ELI5 How are there graffitis in unbelievable/dangerous spots? by [deleted]
I mean, that's also something you only do once without the harness as well
ScienceIsSexy420 t1_jackcdp wrote
Reply to comment by kinyutaka in ELI5: What's hard about copying photosynthesis or just using plants for power by No_Dust_5360
As per my understanding, it is continuously harvesting those free electrons that is the limit of our ability and the focus of the current Research into the topic. Currently no, the materials that we use to harvest the energy generated do not have the lifespan to be of significant use. But the point is that this is a goal worth pursuing further
A_Meal_of_Pain t1_jackbxl wrote
Reply to comment by Ansuz07 in Eli5: How did people know how long a year was in olden times? by Slokkkk
And the tools necessary to make these measurements are very simple. Literally all you need is a stick in the ground and a few pebbles or something else to mark the longest shadow the stick casts each day.
kinyutaka t1_jack5sx wrote
Reply to comment by ScienceIsSexy420 in ELI5: What's hard about copying photosynthesis or just using plants for power by No_Dust_5360
Harvesting the electrons might be feasible, but is it efficient enough for our purposes?
ScienceIsSexy420 t1_jack5ac wrote
Reply to comment by einmaldrin_alleshin in ELI5: What's hard about copying photosynthesis or just using plants for power by No_Dust_5360
Plants are more efficient in terms of energy generated per photon absorbed. As you mentioned, CO2 concentration is absolutely limiting factor for plants, but this could be fairly easily addressed when adapting the technology for a PV cell.
ScienceIsSexy420 t1_jack1ov wrote
Reply to comment by kinyutaka in ELI5: What's hard about copying photosynthesis or just using plants for power by No_Dust_5360
Photosynthesis does indeed generate free electrons, these electrons are used to power redox reactions which are used to synthesize starches. This is indeed an area of ongoing research, one of the professors at the institution I just graduated from was focusing his research on this very topic. Both plants and animals generate free electrons during metabolism, and use these electrons to do things. Harvesting the electrons is quite feasible
sudo_robot_destroy t1_jack1le wrote
Reply to comment by Phage0070 in Eli5 why do stairwells need to be have two flights in a spiral to go up one floor when escalators can just use the one flight going straight up for the same distance? by exmxn
It also seems like having two flights is safer if someone falls from the top step.
tezoatlipoca t1_jack13h wrote
Reply to ELI5: Why do corporate logo redesigns cost so much money when the change is relatively simple? by [deleted]
Not a graphic designer but am friends with a few.
So the first part is you have to sit with the client and figure out whats wrong with their existing branding. Is it stodgy, old fashioned, out dated? If we revise it, are we going to alienate or lose what slice of our long-time customer demographic? what about the old branding can we retain in the revamp, and what can we toss? How many people relate to the "King", how many people find him super creepy. So... all of those "requirements" type meeting take maybe a few hundred hours - at $300/hr or more + expenses.
Then the designers go away and sketch up half a dozen new logos/brandings. Present to customer. Mind you, each one takes several days to prepare, its more than just the logo. Its how that logo appears on the letterhead, the website, the email footers, the actual bricks and mortar signage, the weekly newspring circular -it has to look good and convey the "message" of the new branding in ALL circumstances.
So each proposed new branding could take days or weeks to prepare. You make two dozen and present half a dozen to the customer. They hate every one. Back to the drawing board. And these are good designers who make $200+/hr - or at least that's what you charge the client for.
Go back and forth a few times, you've narrowed it down to 1-2 contenders. Now the focus groups. How does this new logo make you feel vs. the old one? Customer engagement research takes time and money.
So just the ideation here can run you many hundreds of thousands if not millions of dollars and you haven't actually changed anything. You've finally picked the new look and feel of your brand. Now you go to actually make the change.
Sure, telling whoever prints your napkins and takeout bags to just ue the new logo is easy, and you'll consume the stock of old ones in about a week. The new logo doesn't cost any extra to print on a bag or napkin or paper cup than the old one. But now all of your locations have to change. The color scheme of all your interiors. Each location has a 40' lite up sign that needs to change - at $50k per and you have 4,000 locations nationwide. Who eats that? the franchisee or the chain? The franchisees fight back. Um no, Im not eating $200k to change my sign and redo my interior, the staff uniforms, the stupid forms that I use to schedule a bunch of high school kids just because you decided the Burger in Burger King needed to be revamped.
Suddenly you're looking at a tens of millions of dollars change. Seems less attractive. Maybe if we get Spike Jonze to do a Super Bowl commercial for us...
[deleted] t1_jacoj4g wrote
Reply to ELI5 How did we figure out the order for PEMDAS? Like how do we know that that order is correct? by ToodlyGoodness
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