# Tag Info

It is easier to calculate: The pressure of air on the ocean level is $\approx 100 \rm {kPa}$. Thus, its weight is $\approx$ 100000N over $1 \rm m^2$. Considering that the overwhelming majority of the atmosphere is above some km over the surface of the Earth, we can neglige the decrease of the gravity with height. Now calculate the mass of the air above a ...