Question

Why do we feel a pressure on our fingers when we cover a hole in a vessel filled with water

Answer 1

Answer:

Because the air inside the vessel will try to get outside.

Answer 2

Case 1: Full vessel

• Fluid exerts pressure on any surface it comes in contact with.

If above answer is not sufficient:

Case 2: Not full vessel

• The atmospheric pressure outside the vessel is lesser than the pressure inside the vessel, causing the air to want to rush in. But since the finger is covering the vessel, you may feel a pressure on it.