pressure
no, it becomes higher when the air presses down
air has mass
Aha! There is the same amount of pressure inside your body pushing out against the air pressure. This is why astronauts outside of their space lab or Shuttle need a pressure suit - to keep their bodies from exploding (there is no air, therefore no air pressure in space.)
is the force exerted on a given area
The amount of water vapor that air can hold depends on its temperature. Warmer air can hold more water vapor than cooler air. This relationship is described by the concept of relative humidity, which is the ratio of the amount of water vapor present in the air to the maximum amount the air could hold at that temperature.
yes
no, it becomes higher when the air presses down
Air that presses on the earth with force is atmospheric pressure. It is caused by changing in temperature and the natural movement of air around the Earth.
Air pressure
air pressure
air has mass
The amount of weight used in push-ups is based on a person's body weight, while in bench presses, external weights are added to increase resistance.
Atmospheric pressure
The pressure increases and volume decreases. The air presses down.
basically because it has mass and is attracted to the earth by gravity.
When a car is moving, this creates a difference in the relative velocity of the car as compared to the surrounding air. This creates a wind that presses on the windscreen. It doesn't actually matter, in terms of the amount of pressure, whether the car is not moving and the air is moving, or the car is moving and the air is not moving, what matters is only the difference in velocity between the car and the air.
Store something tightly is to make it fit in the least amount of space, or store so it is air tight.