Question
Question: A 2m long tube closed at one end is lowered vertically into water until the closed end is flush with...
A 2m long tube closed at one end is lowered vertically into water until the closed end is flush with the water surface. See figure below. Calculate 'h' as shown in fig.
(Barometric pressure = 1atm = 10 m of hydrosatic water head, tempt.= 25ŗC, density of water = 1g/ml, Neglect water vapour pressure)
A
1.01m
B
0.29m
C
1.71m
D
0.92m
Answer
1.71m
Explanation
Solution
Applying Boyle's law
P1V1 = P2V2
10 × 2 = (10 + h) × h
Ž h = 1.71 m