Question

Three similar open vessels A, B, and C are filled with equal masses of 3 liquids of the same density and kept at 1 m, 1.5 m and 3 m above the ground respectively. Which vessel will experience the highest pressure at its bottom?

• A. Both vessel A and vessel B
• B. Vessel A
• C. Vessel C
• D. Vessel B

Answer 1

The correct option is B Vessel A

We know that pressure under an open liquid vessel depends on the liquid column and atmospheric pressure abow it.
Here, open vessels A, B and C are filled with equal masses of 3 liquids of the same density and kept at 1 m, 1.5 m and 3 m above the ground surface respectively.
Since the liquid has the same densities. So we cannot compare the bottom pressure based on the liquid column above it.
So the vessels with more atmospheric pressure above the liquid column will have more pressure.
Here vessel A is placed 1 m above the ground, it has more air column above it.
Therefore, vessel A will experience the highest pressure at its bottom.