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Game_Minds t1_j110ouz wrote

Reply to comment by labroid in Could being submersed in a sealed tank of fluid help humans survive heavy G acceleration in outer space? by cheeze_whiz_shampoo

Only if the persons density changed at the same rate as the water. Our body would be pushing outwards to maintain a lower internal pressure, making us more buoyant

Makes me think of another question, would the pressure change or the marginally increased g forces kill you first in this experiment

Edit: Another hilarious question... would the water heat up? Increasing pressure rapidly in an incompressible liquid produces heating, see: refrigeration

Would you scald to death, die of a stroke when your gas-free blood still pools in the back of your skull, or die of internal pressure gradient because your cells stop working and burst

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JonJackjon t1_j11waim wrote

>Edit: Another hilarious question... would the water heat up? Increasing pressure rapidly in an incompressible liquid produces heating, see: refrigeration

No, refrigeration depends on the change of state liquid <--> gas of the refrigerant.

I agree a gas will become hotter when compressed. Simply because the "heat" will exist in a smaller volume.

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Game_Minds t1_j121hdb wrote

I did way too much thinking about this today lol

It would be a super small amount of heating unless the acceleration was relativistic, so negligible

The separation effect of the acceleration (centrifuge forces) would also be pretty small at all but very high accelerations

And the amount of damage caused by the acceleration would be a lot smaller without any gas at all-- BUT gas is a byproduct of a large number of our body processes like oxygen uptake, AND that acceleration would still have a meaningful effect on your body's different systems. You would still die of a stroke at pretty small accelerations

Edit: also good call! I totally forgot about the latent heat of vaporization thing being the primary factor

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