Recent comments in /f/explainlikeimfive
thebigger t1_iy8ussc wrote
Reply to comment by kemptonite1 in Eli5: Some ice cream recipes put ice + salt outside the recipient to make it cool faster. But in the winter, salt is put on snow on the street to melt faster. Why one make cool and other melt? by zimobz
> As people have stated, salted ice melts faster than non-salted ice because the freezing point is lowered.
Is that true? The freezing point isn't lowered, per se. Adding salt to ice is adding weight to ice, just like stepping on ice. When you step on ice you compact it, and a bit of it melts. That bit that melts then mixes with the salt and the process begins.
Certainly the freezing point is lowered, but I'm not sure that is relevant here, and it isn't why the ice melts AFAIK.
EvolutionVII OP t1_iy8uj5n wrote
Reply to comment by tdscanuck in ELI5:Why aren't ultracapacitors used more often as range extenders in Hybrids? by EvolutionVII
Yes I understand that aspect, but the concept I have in mind would constantly discharge the Ultracapacitors while being charged by an ICE.
thebigger t1_iy8ug7h wrote
Reply to comment by LorenaBobbedIt in Eli5: Some ice cream recipes put ice + salt outside the recipient to make it cool faster. But in the winter, salt is put on snow on the street to melt faster. Why one make cool and other melt? by zimobz
Are you sure about that? Certainly if you're comparing ocean water to lake water you are correct, but adding salt to ice would be adding energy and slightly increase the temperature if I'm not mistaken.
The role the salt plays is that it facilitates the melting of the ice more quickly, which is colder, but I'm not sure that adding salt makes it colder.
tdscanuck t1_iy8ueeg wrote
Reply to ELI5:Why aren't ultracapacitors used more often as range extenders in Hybrids? by EvolutionVII
Ultracapacitors are terrible at storing large amounts of energy, compared to batteries.
They're very good at charging/discharging quickly, and going through lots of cycles, but at best they can only hold something like 1/300 to 1/1000 of the energy that an equal weight lithium battery can.
Range extension requires storing a lot of energy...batteries are reasonable for that. Hydrocarbons are extremely good. Capacitors are awful.
[deleted] t1_iy8ttyg wrote
shaokim t1_iy8trca wrote
I'm not sure if your premise is correct. In hypovolemic shock, central venous pressure (which I think is a useful proxy for preload) will decrease or remain equal because of lower circulating blood volume. I'm not sure if your reference to "blood cells" is of relevance in this particular bit of physiology.
Total intravascular volume goes down, therefore preload goes down. I think it's roughly as straightforward as that, in any case I don't think it would increase.
thejml2000 t1_iy8t701 wrote
Reply to comment by NadirPointing in Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
For others here (from): > In December 1998, the IEC addressed such multiple usages and definitions by creating prefixes such as kibi, mebi, gibi, etc., to unambiguously denote powers of 1024.[10] Thus the kibibyte, symbol KiB, represents 2^10 bytes = 1024 bytes. These prefixes are now part of the IEC 80000-13 standard. The IEC further specified that the kilobyte should only be used to refer to 1000 bytes. The International System of Units restricts the use of the SI prefixes strictly to powers of 10.
Also: The ISO/IEC 80000 family of standards was completed with the publication of Part 1 in November 2009.
For us old timers (and a lot of documentation), KiB is still new. Indeed, KB is still said used to reference 1024 bases instead of kB which is 1000… and that’s why that IEC 80000-13 was published, to clear up that confusion and add KiB as a documented and remove ambiguity. It didn’t matter so much with low amounts, (64000 vs 65536 bytes for instance) but now that it’s used for petabytes, it’s kind of a big difference.
AlchemicalDuckk t1_iy8su86 wrote
Reply to comment by dr_xenon in Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
It really depends on context and usage, at least historically. The prefix could mean decimal (e.g., 1 kilobyte = 1000 bytes) or binary (1 kilobyte = 1024 bytes). You commonly would have seen the former on things like hard drive sizes and network speeds. So for instance, a 1 gigabyte hard drive would really be 1,000,000,000 bytes.
The IEC defined a new set of prefixes to get around the ambiguity. For instance, the kibi- prefix means 2^10, so a kibibyte is 1024 bytes.
Mammoth-Mud-9609 t1_iy8so41 wrote
Reply to Eli5: Mortgage rates by sanevsnormal27
What complicates the mortgage APR is that you are paying interest on the interest. How the APR works - https://youtu.be/a22RkoupEgE
_Diakoptes t1_iy8scvr wrote
Reply to comment by MarBoBabyBoy in ELI5: Uvalde and the "coward" cops by MarBoBabyBoy
I answered your question. The video is available for you to watch and come up with your own conclusions. You wanted it to be explained, i explained it. If youre looking for someone to defend the thin blue line against, im not your target audience
AngryTaco4 t1_iy8s777 wrote
Reply to comment by Darkassassin07 in Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
Sorry, you're right. My coffee hasn't kicked in.
Darkassassin07 t1_iy8rz4y wrote
Reply to comment by AngryTaco4 in Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
* 1KB = 1024 bytes.
1MB = 1024 kilobytes.
NadirPointing t1_iy8rsj2 wrote
Reply to comment by dr_xenon in Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
you are thinking of kibibyte (KiB), kilobyte is indeed 1000 bytes.
nesquikchocolate t1_iy8r88c wrote
Reply to comment by Wickedsymphony1717 in ELI5. Why do active noise cancelling headphones/earbuds not protect your hearing? by mostofit
Safe exposure to noise levels is measured in doses over duration. "Softer" noise over a long duration can be just as damaging as louder noise over a shorter duration.
Active noise cancellation can reduce this compounding effect over longer durations, but as you've stated already, there's little benefit to funding the medical trials needed for certification, when your competitors will undercut you on price and release products more often than you ever could.
daniuwur t1_iy8qron wrote
Reply to Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
Those usb sticks are built by grouping memory chips on a pcb.
Imagine how hard the logistics would be if instead of a standard 6 pack beer we had 7 packs, 5 packs, 11 packs, 13 packs
In thus case a 6 pack is a memory module of 8gb, if you ask the manufacturer to build a 42.069 gb usb they will say "i can do either 32 or 64, im not going to design and manufacture a special design just for you (i can do it, but it will cost you more than making a 64 gb version)"
Edited because 40 is a multiple of 8 lmao
nesquikchocolate t1_iy8qqw0 wrote
Reply to comment by Ippus_21 in ELI5. Why do active noise cancelling headphones/earbuds not protect your hearing? by mostofit
Yeah, no... That's definitely wrong. Active noise cancellation (ANC) reduces the sound energy which makes it to your eardrum.
To claim that it works medically, though, takes years of medical trials under rigorous standard. Very few companies have the desire, drive or funding to commit to such an endeavor, and it won't help their bottom line either, because now other companies can use this research to support their own claims about protecting your hearing.
dr_xenon t1_iy8qjdh wrote
Reply to comment by nrron in Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
And one kilobyte is not 1000 bytes, it’s 1024 bytes. 2^10= 1024 Same with mb, gb, tb etc.
AngryTaco4 t1_iy8qeaj wrote
Reply to Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
Bits and bytes are exponential starting with 1. It's the same reason that ram modules generally follow the same pattern. It's also the reason that 1kB is actually 1024 bytes and not 1000.
There are some instances where it isn't followed but it's just easier that way.
nrron t1_iy8q17a wrote
Reply to Eli5 Why there arent like 20gb USBs instead each usb has twice as much as the previous(8gb,16gb,32gb,64gb,128gb by nightmarebg69
Because of binary. All data storage sizes tend to be powers of 2 because of the binary nature of computing and storage. They are doubling because they’re the next power of 2
Belbarid t1_iy8pr85 wrote
Reply to Eli5: Mortgage rates by sanevsnormal27
>I just don't understand how they can calculate this amount of difference in repayments..
Amortization tables and calculators. U.K. is probably a little different, but in essence an amortization table shows the relationship between your total mortgage amount, your interest rate, your remaining principle amount, your loan length, and your monthly payment. Change any part, such as your interest rate, and the table can be rebuilt showing the effect of that change. If your interest rate goes up, the table will show how your payment is affected, based on how much longer you have on your loan and how much of the principle you've paid off.
Which leads me to a big piece of general advice. Overpay and make sure that your overpayment is applied to principle and is not applied to your next payment. Even small reductions in your principle can have a large effect on your length of payment, which in turn reduces the amount of interest you pay.
Find a good amortization calculator online and play with the numbers. Find out what happens if you overpay £50 per month, for example.
quackl11 t1_iy8pc9t wrote
Reply to comment by TheKittenSaur in ELI5: Why do condoms have so many different types (invisible, extra safe, feel thin, etc). How do you know which one to pick? by [deleted]
5th hint: if this is all too much work then dont have sex, get oral instead
Ippus_21 t1_iy8p3e7 wrote
Reply to comment by mostofit in ELI5. Why do active noise cancelling headphones/earbuds not protect your hearing? by mostofit
Because it only makes it "sound" quiet, without necessarily reducing the actual sound pressure you're exposed to, and it provides no protection against v. loud or percussive sounds.
Tbf, some legit hearing protection also includes noise cancelling, or has other technology to let, e.g., normal speech filter through and just break off the peak decibels.
dozure t1_iy8ooip wrote
Reply to comment by [deleted] in Eli5: Mortgage rates by sanevsnormal27
Ah, thanks.
[deleted] t1_iy8ok4m wrote
[deleted]
[deleted] t1_iy8uvgy wrote
Reply to ELI5:Why aren't ultracapacitors used more often as range extenders in Hybrids? by EvolutionVII
A 400F supercap holds about 1/20th the energy of a single AA battery. Whilst being both heavier and larger. That probably answers your question.