Recent comments in /f/explainlikeimfive
lucky_ducker t1_ixubbvq wrote
Reply to ELI5: In recent years, new formats like webp and jfif have started popping up. However, if I rename them to gif or jpeg, they still work. How can it be that renaming the extension doesn't ruin the image format? Why do they even exist then? by Luthemplaer
The file extension is just a suggestion to the OS what application should be used to open the file, and you can change the file association if you want. On Windows, you use the Default Apps applet to change specific file extensions to be associated with specific applications.
The real format information is in the metadata of the file itself, the first few bytes of the data. For example, if the first two bytes of a file are MZ the file is a DOS/Windows executable file (MZ are the initials of the guy who designed the file format).
JPG and JPEG files have, for some time and for the most part, been saved in the JFIF format internally. If you open a JPG file in a hex editor or programmer's text editor, you'll see somewhere around byte offset 0x7 the characters JFIF indicating that the file is actually in that format. Likewise PDF files have PDF in about the same position.
KrustyBoomer t1_ixu93gc wrote
Reply to comment by [deleted] in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
For 100-years, NO ONE ever turned their cars off typically to fuel, for sure after self-pay became the norm. I think part of today's worry is how hot catalytics get and could ignite vapors. Probably still hot though.
This one is the classic static spark though, getting back in the car error I pointed out. Forward to end, lot of filler.
Mysticpoisen t1_ixu82j5 wrote
Reply to comment by Tardis80 in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
The US does not use them, as far as I can tell baby in microwave is not a warning label in any country.
Dinux-g-59 t1_ixu7w4n wrote
Reply to ELI5: In recent years, new formats like webp and jfif have started popping up. However, if I rename them to gif or jpeg, they still work. How can it be that renaming the extension doesn't ruin the image format? Why do they even exist then? by Luthemplaer
Renaming the extension doesn't ruin the file/image format. Window's relies strongly on extensions to know which program use to ipen a certain file when you double click it. Other OSes, like Mac and Linux use the magic number to determine the type of file. If your orogram is able ro open the file once renamed, you may simply right click on one of them, with the original extension, choose "open with" the program you use and tick the box to always use that program. This should solve your problem.
Weird-Brilliant9423 t1_ixu5tuj wrote
Reply to comment by hellokylegoodbye in eli5 why raspberries spoil so much easier than other commercially harvested berries? by newerdewey
You didnt know raspberries were hollow?
Fat_IRL t1_ixu5fba wrote
Reply to comment by JaggedMetalOs in ELI5: In recent years, new formats like webp and jfif have started popping up. However, if I rename them to gif or jpeg, they still work. How can it be that renaming the extension doesn't ruin the image format? Why do they even exist then? by Luthemplaer
Yeah you right with all of that, especially the last, I was kinda being generic with my response.
It just kinda freaks me out when I'm on my Linux laptop and it'll save my file 'fartbutt' as a file with no extension at allunless I tell it to, and it's still valid.
Fat_IRL t1_ixu4oej wrote
Reply to comment by SideWinderSyd in ELI5: How are archers “efficient” in combat? by Environmental_Point3
No. Not in the way you're probably thinking. Drawing a bow (correctly) is almost all in the back muscles. Or really they ARE muscles that control your arm, but they are located in your back. In theory. But unless you're an Olympian or have impeccable technique or something like that, your arm is gonna be involved.
Kinda like how a pull-up isn't an arm exercise, it's really your back muscles moving your arms.
If you're using a modern bow and don't know what you're doing, it's gonna be difficult now matter how strong you are, or what the weight is. 50 pound draw and your first time? Its gonna suck. But 12 year olds can hand a 50 pound draw on aodrrnn bow if they know what they're doing.
jackmax9999 t1_ixu46oh wrote
Reply to comment by someone76543 in ELI5: In recent years, new formats like webp and jfif have started popping up. However, if I rename them to gif or jpeg, they still work. How can it be that renaming the extension doesn't ruin the image format? Why do they even exist then? by Luthemplaer
I use IrfanView as my image viewer and it even notifies you when the extension doesn't match the actual file format, like "this JPEG file has .png extension, would you like to rename it to .jpg?"
Fat_IRL t1_ixu3x4w wrote
Reply to comment by Supraman83 in ELI5: How are archers “efficient” in combat? by Environmental_Point3
90 pounds seems pretty much around (even sometimes low) what I saw referenced in my 2 mins of googling. So yeah.I cannot imagine how fucking strong you gotta be to do that even. 70 pounds is rough to me, muscular wise...but then I got like a lil trigger apparatus that connects to my wrist so I don't have to use my actual fingers.
Just think about how much pressure is gonna be on their fingers. with a cord of fabric of some type putting 90 pounds of pressure on your fingers as you draw the string back. That's hell. What badasses.
strangway t1_ixu2tlb wrote
Reply to ELI5: In recent years, new formats like webp and jfif have started popping up. However, if I rename them to gif or jpeg, they still work. How can it be that renaming the extension doesn't ruin the image format? Why do they even exist then? by Luthemplaer
And whatever happened to JPEG-2000? I thought that was supposed to be the future of JPEGs, lol!
I figure someone here would know.
kyrsjo t1_ixu2h7p wrote
Reply to comment by BigChiefS4 in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
Yeah, a huge lump of iron sitting inside a somewhat isolated bay won't go from pretty warm to -40 in a few minutes. That said, starting a really cold diesel isn't fun, and probably puts a ton of wear on it. Fuel freezing isn't really a problem tough, since there is a different fuel blend in the winter...
nesquikchocolate t1_ixu27r4 wrote
Reply to comment by [deleted] in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
Let me help you quickly with this postulation.
I postulate that the sign stating your engine must be off during refueling exists. I also postulate that because this sign exists, an incident with refuelling was prevented. Prove I'm wrong?
kyrsjo t1_ixu1ofb wrote
Reply to comment by the1slyyy in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
Also, starting a warm engine doesn't take much, compared to i.e. a normal or especially a really cold start. To start my old diesel car when its say -20c and it's had time to get really cold, takes a while, even after bumping the glow plugs a few times.
kyrsjo t1_ixu1fuj wrote
Reply to comment by tiedyemike8 in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
Oh, yeah. I have a picture of myself refilling a Trabant (old Soviet car), the tank was inside the engine bay, on top of the (hot) engine.
Dannybuoy77 t1_ixu0pxo wrote
Reply to comment by bmccooley in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
UK fuel stations are probably 80% pay inside. Some have chip and pin readers now but not many
bmccooley t1_ixu0hpy wrote
Reply to comment by Dannybuoy77 in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
Go to pay? I don't think I've gone into a station to pay in 20 years.
[deleted] t1_ixu0h9l wrote
Reply to comment by nesquikchocolate in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
[deleted]
nesquikchocolate t1_ixu056o wrote
Reply to comment by [deleted] in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
Except that your entire position depends on using Google to not find some obscure hand-written news article about a 93 year old ford that caught fire at a refuelling station.
Your assumption is that all incidents are listed on the Internet and easily searchable using common terms - which is absolutely false in any event. Not every town has a news reporter that documents every occurance in a public facing repository.
atomicmrpelly t1_ixtzr74 wrote
Never mind whether or not it's safer to switch the engine off, there is no need to leave the engine running, wasting fuel and belching CO2 and other pollutants into the atmosphere when the car is not going anywhere.
[deleted] t1_ixtzi76 wrote
Reply to comment by nesquikchocolate in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
[deleted]
Flair_Helper t1_ixtzh8d wrote
Please read this entire message
Your submission has been removed for the following reason(s):
- ELI5 requires that you search the ELI5 subreddit for your topic before posting. Users will often either find a thread that meets their needs or find that their question might qualify for an exception to rule 7. Please see this wiki entry for more details (Rule 7).
If you would like this removal reviewed, please read the detailed rules first. If you believe this submission was removed erroneously, please use this form and we will review your submission.
nesquikchocolate t1_ixtzedh wrote
Reply to comment by [deleted] in ELI5: Why do you have to turn your car off when you fill up your tank? by logan0921
Like I said, can't prove a negative that way..
SideWinderSyd t1_ixtzc1m wrote
Reply to comment by FencingCatBoots in ELI5: How are archers “efficient” in combat? by Environmental_Point3
Thanks so much for the link - TIL!
And I just realised the modern equivalent would be people carrying shoulder bags or single strap bags. There's a difference in their gait, muscle structure and bones too.
JaggedMetalOs t1_ixtza8l wrote
Reply to comment by Fat_IRL in ELI5: In recent years, new formats like webp and jfif have started popping up. However, if I rename them to gif or jpeg, they still work. How can it be that renaming the extension doesn't ruin the image format? Why do they even exist then? by Luthemplaer
> File extensions don't actually matter, they're for humans, not computers. More or less.
Well, I wouldn't say that. They are used (in Windows) to decide what icon to use and what program to open it with when you double click.
Technically Windows could look inside every file to decide this, but that would be much slower when listing files in a folder.
Also while most applications will check the contents of a file while opening it, some assume a format based on the file extension (eg. LibreOffice will always open .csv as a text csv file, even if the file is actually an xls/ods)
YungSkuds t1_ixuc9mm wrote
Reply to comment by strangway in ELI5: In recent years, new formats like webp and jfif have started popping up. However, if I rename them to gif or jpeg, they still work. How can it be that renaming the extension doesn't ruin the image format? Why do they even exist then? by Luthemplaer
It is still around and a decent format, just not so much for “normal” images. It is big in medical imaging and some other specialty industries for a number of its features.