Air Pressure

Introduction|Air Exerts Pressure|Activity|OMR

What would be the height of the atmosphere if the air density (a) were uniform and (b) decreased linearly to zero with height? Assume that at sea level the air pressure is 1.0 atm and the air density is 1.3 kg/ m^(3)

The force of surface tension acts tangentially to surface whereas the force due to air pressure perpendicularly on the surface. How is then due to excess pressure inside a bubble bal force due to the surface tension ?

A barometer kept in a lift reads 11 cm of mercury, when the lift is stationary. Then the lift starts moving down with an acceleration a, where a lt g. What is the air pressure in the lift, as read by the barometer ?

The density of air at normal atmospheric pressure is 1.293kgm^(-3) . What would be the density of air at a pressure of 10 atmospheres?

Air exerts pressure because it occupies space and has weight.