On the floor of a high-rise building, the atmospheric pressure is 750 mm Hg, on the ground

On the floor of a high-rise building, the atmospheric pressure is 750 mm Hg, on the ground it is 757 mm Hg. Find the height of the floor?

It is known from the condition that the atmospheric pressure on the floor of a high-rise building is 750 mm. rt. Art., on the ground it is 757 mm. rt. Art. Do we need to find the height of the floor?

Let’s start by writing it down:

P1 = 750 mm. rt. Art.

P2 = 757 mm. rt. Art.

Find: h -?.

So, it is known that when the altitude changes by 12 meters, the atmospheric pressure changes by about 1 mm. rt. Art.

Let’s calculate the difference between atmospheric pressure on earth and atmospheric pressure at altitude:

ΔP = P2 – P1 = 7 mm. rt. Art.

We are looking for the height of the floor:

h = 12 * 7 = 84 meters.