Question: A vessel contains kerosene. Find the magnitude of pressure at a point 75 cm deep from the surface of kerosene. [Density of kerosene is 800 kgm-3]
Given,
Depth of the liquid, h = 75cm = 0.75 m
Density of the liquid, p = 800 kgm-3
Acceleration due to gravity, g= 9.8 ms-2
Pressure P = ?
Solution
We know, P= hpg
or, P = 0.75 m x 800 kgm-3 x 9.8 ms2 = 5880Pa
Ans: 5880Pa
Note: The atmospheric pressure on the peak of Mount Everest is about 30% of the sea-level air pressure. For this reason respiration becomes difficult at such a high level. There is a possibility of bleeding from the nose at high altitude as atmospheric pressure is considerably low there. Nowadays normal pressure is kept inside a plane for the convenience of the passengers when it flies at a very high altitude and low pressure region.
