thanks dear Russ.
You say "the pressure inside a closed vessel is not related to the weight of the air inside ..."
So if my vessel is 80km high (say about the same hight as the atmospheric layer) and open at the top, naturally filled with air, and I hovered over that top and ever so gently...
Dear All:
Thank you for your input.
Kindly consider (macroscopically) a closed vertical column standing 10m high with vacuum inside it with 1m x1m square cross section.
Suppose it has inside it 100 rubber balls (engaging in elastic ever lasting collisions) with initial individual speed v...
Dear forum,
How can we state that the table surface is subjected to the total weight of all air molecules above it (P=nmg/S) when these molecules are known to be bouncing in all directions, and thus at any specific instant a good fraction of these molecules is probably traveling upwards or...
Thank you dear Bill.
You are right, v and V both get smaller and the pressure remains constant. Very good point indeed.
But by what concrete physical mechanism does my original air column exert force on the table surface? at zero temperature (for the whole column), all molecules are sitting...
Dear list,
Imagine a table of upper surface area S sitting in an open field, with nothing on it. We know that S is subjected to a downward atmospheric pressure P due to a cylindrical column of air of volume V extending vertically from S to the end of the terrestrial atmosphere. Assume this...