Question

A closed vessel is half filled with water. There is a hole at the top of the vessel and air is
pumped out from this hole. Then
(a) The density of the liquid will decrease
(b) The pressure at the surface of the water will decrease
(c) The water level will rise up in the vessel
(d) The force by the water on the bottom of the vessel will decrease
Which of the above statements are correct ?
(1) (b) and (c) are correct
(2) (b), (c) and (d) are correct
(3) (b) and (d) are correct
(4) (a) and (b) are correct

Answer 1

b.
c.
and d.
are the correct answer
I hope it will correct

Answer 2

2) b. c. d. are correct

This is because when the force acting in downwards direction is decreased the the up thrust increases and it causes the following changes:

● Water level increases.

● The pressure at the water surface decreases.

● The force by the bottom of the vessel decreases.


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