Recent comments in /f/explainlikeimfive

Eastofdark t1_ixx3mxk wrote

This is misleading. In women everything is separate, unlike men. Separate vaginas and urethra and of course separate anus. But they are all close together, and pregnancy and birth puts massive stress on the area and on the pelvic floor muscles. When these muscles are stretched from birth, and in combination with hormones at birth that allow the stretching of pelvic ligaments, a woman can end up with a weak bladder. There is no good reason for women who have not been pregnant, or especially given birth, to have particularly weak bladders compared to men. Women are always more subject to bladder infections though as the tubes that connect the outside with the bladder, the urethra is very short in women compared to that of men which runs the entire length of the penis, so bacteria can get into the bladder much more easily.

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queensg28 t1_ixx1abl wrote

Because everything for Women is connected. It's all internal. Anus, pelvic floor, vagina, uretha. It's all connected. Like a web. If one part of the web is too weak or its hurt (like after having a baby), it impacts the other connected strands.

For guys, it's external and separate. Less connections. Penis and uretha is separate from testicles which are separate from anus. Also, not having babies sitting on a bladder 9months and not having to push anything out is a big factor too lol

A common fear women have during birth is that they'll poo on the table. It's actually encouraged by health professionals because if you're pushing enough to feel that sensation, you're using the right muscles and pushing the right way. Again - all connected.

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Dunbaratu t1_ixx0n9f wrote

There are two ways programs try to identify the format of a file.

One is to just naively trust the extension. This can sometimes lead to security problems because it causes the OS to open a file is the "wrong" program if the file extension isn't named right.

Another is to utterly ignore the extension and just read the starting bytes of the file's content. Pretty much all files use an ID code as the first few bytes of content that define the file type. They all do this other than plain old ASCII files (Or Unicode UTF-8 files which end up kind of being the same thing as plain old ASCII.) In the UNIX world the first two bytes of file content were referred to as the file's "Magic Number" and you could figure out the type just from those two bytes. But later the algorithm to identify a file by its first few bytes got more complex as some files started using longer byte patterns so it's not just the first two bytes now sometimes it's the first 4 or the first 8.

In the Windows world, it wasn't so common to use the "magic number" idea originally, but it tends to use it more nowadays than it used to.

The problem with using the "magic number" method is that while it may be much more reliable than using the file extension that any user can just name wrongly, you cannot see this "magic number" until you open the file and start reading it. When the file is just a directory entry in a folder and you haven't looked inside it yet, you don't have anything to go on other than the extension. It's impractical and slow for a program that's showing a list of files in a folder to open every file one at a time to read the magic number from all of them. It relies on the file extension to decide what to show you on the screen for the file's icon, and to guess what program should open the file.

The reason .webp and .jpg both work is because often the same program that can read a .jpg file can also read a .webp file, so once the program is opening the file and reading the content, it (should) no longer care what the filename extension was and just believe the magic ID number in the file's content. When it reads that it goes, "oh, this is webp. Well I know how to display those so I'll read this file as webp and show it" and it completely ignores that the filename claims it's a jpeg file.

The place where the file extension being wrong for the format causes big problems is when the program that can read a file of one type cannot read a file of the other type. Then the extension being wrong causes the system to open it in the wrong program, which can't deal with it.

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-WhatCouldGoWrong OP t1_ixwuz9a wrote

*does his best robert duvall impression*

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i love the smell of shredded skin in the morning!

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maybe im getting old and grumpy or just need to buy better lighters. I'm looking at a blood blister on my lighter finger and I'm genuinely hating the wheel right now

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thedeejus t1_ixwuhgw wrote

imagine you're in Kansas City, then you travel 100 miles due south. If you drew a line between the two points, then extended that line all the way around the world, like a spun-around equator, it would pass through the north pole right? That's how you know it's "due" north or south, because it passes through the poles, any other direction wouldn't.

Well, if you draw an equatorial line between the north pole and any other point, it passes through the north pole, by definition.

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StatusBattle9300 t1_ixws4g7 wrote

Professional archer here; no 12 year old can pull a 50lb draw, especially any recurve or longbow format. Re. compound bows, maybe if they were abnormally strong they could get to the let off point just once where the cams drop the weight down to 8lbs, but I doubt it. They’d have to pull 50lbs many inches to get there. Most 12 year olds will start on 14-18lb bows and by the time they’re full adults age they’d be pulling 54lbs ish if they were really fit, had great technique and a decent enough amount of muscle. I shoot every day and pull 56lbs, by the end of sessions I’m absolutely shattered.

Apart from that nitpick, really good explanation of the muscle use.

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Truth-or-Peace t1_ixwrltr wrote

Entropy is a measure of how many different (microscopic) states would meet a given (macroscopic) description. For example, suppose we have 64 pennies on a chessboard. There's exactly one way for them to meet the description "all on square a1": the first penny would have to be on a1, and so would the second penny, and so would the third penny, and so on. On the other hand, there are 64!≈10^(89) ways for them to meet the description "one penny per square": there are 64 different pennies that could be on square a1, and after that's chosen there are 63 different pennies that could be on square a2, and after that's chosen there are 62 different pennies that could be on square a3, and so on. So "one penny per square" is much higher-entropy than "all on square a1". Similarly, a universe where all the matter/energy is in one place ("Big Bang") is lower-entropy than a universe where the matter/energy is all spread out evenly ("heat death").

There's a weird sort-of-law of physics that says "the entropy of the universe always increases over time". It is, in fact, the only known difference between the future and the past: all other laws of physics work the same in reverse as they do when running forward.

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