What effect does air pressure 800 and 1025 have on human body?

According to the calculation, the total weight of the atmosphere is 5.3× 10 14 tons, and the pressure it exerts on each adult is equivalent to 15.0~20.0 tons. This pressure can be balanced by internal pressure, so it is not felt at ordinary times.

Origin of gas pressure: According to the theory of molecular dynamics, the pressure of gas is caused by the frequent collision of a large number of molecules with the container wall. The impact time of a single molecule on the container wall is very short, and the effect is discontinuous, but a large number of molecules frequently collide with the container wall, and the force on the container wall is continuous and uniform. The ratio of this pressure to the wall area of the container is the pressure.

Extended data:

Calculation methods: there are usually the equilibrium condition method and Newton's law of motion method (the formula is only a rough calculation, sometimes the measured value is inaccurate, and everything is subject to reality).

1. After Torricelli measured the air pressure, people used the formula P = f/s to calculate the mass of air per unit area, then applied the density of air to calculate the volume, and then divided by the mass, we knew the distance from the ground to the top of the atmosphere.

2. It is known that when the volume of gas, the amount of substance and the absolute temperature (where R is a constant, R = 8.314 Pa m 3/mol k or R = 0.0814 ATM l/mol k), the gas pressure can be obtained by the formula PV=nRT. This formula also has deformation formulas pV=mRT/M and p = ρ rt/m.

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