Atmospheric pressure is the air around you that has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer.
The weight of air on surfaces within Earth’s atmosphere, about 14.7 PSI (101 kPa) at sea level. Such pressure is also supplied artificially in spacecraft and spacesuits.
Watch this video: GCSE Physics – Atmospheric Pressure
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