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kamrannkk
2011-Nov-06, 12:11 PM
Why man feels quite comfortable on the earth despite the atmospheric pressure.
1)An equal and opposite pressure acts from inside
2)due to gravity

grapes
2011-Nov-06, 12:34 PM
Why man feels quite comfortable on the earth despite the atmospheric pressure.
1)An equal and opposite pressure acts from inside
2)due to gravityWhy does #2 come into play?

Welcome to BAUT, kamrannkk!

neilzero
2011-Nov-07, 05:41 AM
With no gravity, the atmosphere would expand approaching zero pressure as an asymptote.

grapes
2011-Nov-07, 09:41 AM
I understand how the gravity induces the (tremendous) atmospheric pressure, but how does it answer the question in the OP, "despite atmospheric pressure"?

Strange
2011-Nov-07, 11:22 AM
Why man feels quite comfortable on the earth despite the atmospheric pressure.
1)An equal and opposite pressure acts from inside
2)due to gravity

(2) is the cause; (1) is the reason we don't feel it. Actually, that should be extended to "equal pressure acts from above, below, all sides, inside and outside".

John Jaksich
2011-Nov-07, 01:02 PM
I am under the impression that forces within our cells (due to water, plasma, electrolytes , etc. ) are an equilibrium that is related to our how we experience the force of gravity times the area of the cells in our body.


Pressure = mass/area ??

grapes
2011-Nov-07, 01:15 PM
Pressure = mass/area ??More or less. Pressure is force per unit area.

Hornblower
2011-Nov-07, 01:19 PM
I am under the impression that forces within our cells (due to water, plasma, electrolytes , etc. ) are an equilibrium that is related to our how we experience the force of gravity times the area of the cells in our body.


Pressure = mass/area ??

Pressure = force/area.

In this case the force is the gravitational weight of the overlying air, which is balanced by the opposing force that is associated with the rebounding of fluid molecules as they bump into each other and against the walls of whatever barrier constrains the fluid.

grapes
2011-Nov-07, 01:25 PM
There's also bone mineral, I don't think that's liquid anymore, right?

John Jaksich
2011-Nov-07, 05:32 PM
There's also bone mineral, I don't think that's liquid anymore, right?

That's right thanks to both grapes and Hornblower