3 ms·
>that means the pressure forced lake water into the bottle around the cork no, it doesn't. perhaps the cork seal was tight enough to not let water pass, but he
by fsckboy 2y ago
>that means the pressure forced lake water into the bottle around the cork
no, it doesn't. perhaps the cork seal was tight enough to not let water pass, but helium could get through. The lake water pressure and very trace amounts of helium in the water would slowly increase the pressure in the bottle due to helium infiltration.
of course other "air" molecules might make it in, H2 or N2 (i'm not an expert on the size of N2)
- lupusreal 2y agoShouldn't the partial pressure of helium in the lake water be extremely low, given the low partial pressure of helium in the atmosphere above the lake? Physics class was a long time ago but I think that's how Henry's Law works.
- 93po 2y agothe partial pressure of helium in the atmosphere is minimal (about 0.0005%), and the amount in the lake water would be even lower, making helium infiltration unlikely to be a significant factor. my extremely unqualified opinion is that water seeped in through the cork, but the cork was still fairly well lodged in place, so it had the high pressure of being 15 meters down despite not being originally bottled at pressure, and when brought back up, the glass shattered instead of the cork popping out
- refurb 2y agoAre you saying helium would move into the bottle from an area of low concentration to one of higher? Against the gradient? Free energy?
- fsckboy 2y agoare you saying that your coffee water doesn't pass through the coffee filter because it's against the gradient, or that your coffee grounds will pass through the filter to eliminate the gradient? Are you Maxwell's daemon!?
- refurb 2y agoWater moving through a coffee filter is not moving against a concentration gradient, it's moving with it. This is basic science.