Does air have weight and exert pressure?

Answer 1

Yes. All gases exert some pressure due to the weight of their molecules. But it depends on the concentration of the gas (mass per volume) and will vary with temperature and flow velocity.

In the atmosphere, air pressure is created by gravity, which pulls down on the molecules at the surface and those stacked up above it. The downward pressure of each "stack" of molecules, from the surface to space, translates into force exerted on all sides of any object in the atmosphere. It is about about 14.7 psi or lbs per square inch at sea level, and less than that at higher altitudes.

Cold air, which has molecules closer together, is denser than warm air, and moving air exerts additional pressure in the direction of motion. Air masses that are denser will move under (and displace) warmer air masses.

Answer 2

if u think it exerts then it exerts if u don't think so it don't exert

Answer 3

The simple answer is yes.

But ... ... Pressure = 1/volume

Hence to allow pressure =0, volume must be infinitely large. Say for example in outer space.

Answer 4

air is like water--meaning that it's fluid. and, like water, air exerts pressure when it is moving (and in any direction, too).

Answer 5

Yes