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The Something Awful Forums > Main > General Bullshit > Peeing in the bathtub: does the water level rise, fall, or stay the same?
What happens to the water level when you pee in the bathtub?
Water level rises
Water level falls
Water level stays the same
Goku
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mobby_6kl
Aug 9, 2009

by Fluffdaddy

Moon Atari posted:

It will definitely reduce your mass, but might not reduce your volume, and it is the volume that causes the displacement of water. When your bladder expands to full it might simply compress the surrounding viscera/muscles/ interstitial tissue/whatever rather than expanding your waist outwards slightly, such that your external measurements do not change when you then release your bladder.

Your water balloon in a pool example works because releasing liquid from a balloon changes the dimensions of the balloon, reducing its volume. But it wouldn't work the same if it was a rigid container that doesn't difform with the release of its contents.

But maybe a particularly full bladder does expand the waist outwards. I feel like it might vary by body composition, but it definitely doesn't increase the volume of the body by the full volume of the urine. Average bladder capacity is around 300-400ml, but you certainly aren't losing and gaining a coke can sized growth to your waist between pisses.
Ever drank a lot before going to sleep? In the morning I can look like I'm pregnant if I make it through the night without waking up. So yeah it definitely expands the waist, but OTOH there's also some internal volume which doesn't change so the water level will rise but not as much as the volume of piss would suggest.

* # ¿ Aug 28, 2020 10:47
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# ¿ Apr 27, 2024 14:14
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mobby_6kl
Aug 9, 2009

by Fluffdaddy

RandomFerret posted:

Penises don't accrue body fat (oh would that it were not so!) so they'd be denser than water and sink

Can confirm, sinks like a rock :smug:

* # ¿ Aug 30, 2020 18:09
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The Something Awful Forums > Main > General Bullshit > Peeing in the bathtub: does the water level rise, fall, or stay the same?