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Gas is subject to gravity in the same way as everything else. The Earth retains its atmosphere because of gravity. Gases have a general tendency to expand to fill all of the space available to them, but the gases that make the Earth's atmosphere cannot expand for ever into space because gravity causes them to stick to the Earth. The balance between expansion and gravity means that atmospheric pressure is higher where gravity is higher. As you move away from the Earth, gravity is weaker and the gases that make up the atmosphere can expand and so have lower pressure.
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What is the Density of air at 0 C?
At standard pressure (100 kPa), dry air at 0 °C has a density of 1.2754 kg/m3 or 1.2754 g/L. Changing the composition, pressure, temperature or humidity changes the density.
What has an airtight metal chamber that is sensitive to changes is air pressure?
Aneroid barometer is an airtight metal chamber that is sensitive to changes in air pressure
How does air pressure effects a sound wave?
The speed of sound in air changes clearly with temperature, a little bit with humidity − but not with air pressure (atmospheric pressure).
Is air everywhere equal in pressure?
No. The pressure changes depending on elevation and also the current weather.
What changes in air pressure what would you expect if you carried a barometer down a mine shaft?
Density and air pressure will increase, while altitude decreases.
Does big changes in air pressure indicate the weather is changing dramatically?
it does not
What does air pressure changes with changes?
air mass
How do meteorologist use changing air pressure to predict weather?
Air pressure is constanly changing so it helps.
Why are there changes in air movement air pressure and humidity?
There are changes in air movement,air pressure ,and humidity because of the weather and the condensation.
Why do your ears hurt during take off and landing?
The pressure outside of your eardrum in the plane changes as the plane goes up or comes down - this causes pain because the pressure behind your eardrum is either higher or lower than the pressure inside the plane.
What is the changes in air pressure caused by?
The changes are caused by the weight of air above it.
Why is the atmosphere constantley changing?
air pressure
How does air pressure changes in tornado?
The air pressure drops sharply in a tornado
Which air pressure system is generally associated with warm moist air?
Choices; low pressure, changing pressure, high pressure, no pressure.
What is Density of air at 0 C?
At standard pressure (100 kPa), dry air at 0 °C has a density of 1.2754 kg/m3 or 1.2754 g/L. Changing the composition, pressure, temperature or humidity changes the density.
What is the Density of air at 0 C?
At standard pressure (100 kPa), dry air at 0 °C has a density of 1.2754 kg/m3 or 1.2754 g/L. Changing the composition, pressure, temperature or humidity changes the density.
What is the tool that records air pressure changes?
Barometer is the instrument that measures air pressure
