Take a tin can with a lid. Fill it approximately with half of water. Heat the can on a candle flame till the water boils. Let the water boil for a few minutes. Blow out the candle. Immediately put the lid tightly on the can. Be careful in handling the hot can. Put the can carefully in a shallow metallic vessel or a washbasin. Pour fresh water over the can.
THE CAN GETS DISTORTED DUE TO THE AIR PRESSURE EXERTED.
If you can't get a tin can, take a soft plastic bottle. Fill it with hot water. Empty the bottle and immediately cap it tightly. Place the bottle under running water.
Here are 2 examples: - hot airballoon - hot air rising, and cold air falling.
Some examples are, hot air ballons, ships, bouys, actually just about anything that floats in air or water :p
Because it doesn't say neither the temperature, the pressure or the humidity of the air. You need to know both the temperature, the pressure and the humidity of the air to say anything about the mass of one cubic meter of air.
Running water moves the air next to it. Moving air has less pressure than air that is still. This is the Bernoulli principle, and helps airplanes to fly. With less pressure on one side from moving air, and more pressure on the other side from still air, the ping-pong ball moves towards the water.
The pressure is due to the weight of all the air above a certain point. Pressure is simply weight per unit area.
-- Pressure -- Wind
weight
no...
Because the pressure can be measured with a barometer.
devin in it
Force exerts pressure. For example: At the surface of the Earth the column of air in the atmosphere above an area has a mass that exerts a force (due to gravity) on that surface area.
1 atm
Cold air exerts a low pressure. That is why cold air falls and hotter air rises above it.
Dry air exerts less pressure than air that has a higher humidity. In general, air pressure is the sum of the individual pressures of gases present in the air. Dry air lacks any water vapor pressure in the air. Therefore, any air with a humidity above 0% has a higher pressure than dry air.
air molecules in cold air exert more pressure because they are closer together and collide more often
Yes. Atmospheric pressure is the pressure caused by air when it exerts pressure on the surface of earth.
Blowing up a balloon.