Physics Quiz Question

the variable that matters is that there's 14.7 pounds of air over
every square inch at sea level. If that's the one that stays constant,
the answer is clear.

On Aug 6, 3:00 pm, "Capt. Geoffrey Thorpe" The Sea Hawk at wow way
d0t com wrote:
"Dallas" wrote in message

...

Brought over from RAS:

Assuming that all other variables remain constant:

An increase in temperature will result in a higher atmospheric pressure -
a
higher temperature speeds up the movement of the air molecules, thereby
raising the pressure they exert on the surrounding atmosphere.

A) True
B) False

False and/or True.

The air can expand. If it expands vertically, the pressure is unchanged. If
it expands horizantally, the pressure goes down. If the air is constrained,
the pressure goes up.

Depends on what you mean by "all other variables remain constant"

PV = nRT

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Geoff
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On Aug 6, 9:37 pm, Tina wrote:
the variable that matters is that there's 14.7 pounds of air over
every square inch at sea level. If that's the one that stays constant,
the answer is clear.


Well...not to quibble, but 14.7 (ok, 14.694) psi is the MEAN sea level
pressure. There are localized variations in pressure caused by
density differences over those areas. (which is why GENERALLY
speaking, areas of lower pressure indicate "rain" systems; the lighter
air indicates a higher moisture content).

Although, in large enough volumes the differences are close enough to
zero that they do not significantly affect calculations since

lim (m/V) = 0
V-inf