A narrow, uniform glass tube, closed at one end, constains air which is sealed by a thread of mercury. The tube is placed first horizontally and then vertically with the open end at the top. Which of the following statements is correct?
A
The length of the entrapped air in the horizontal position is less than that in the vertical position
B
The length of the entrapped air in the vertical position is less than that in the horizontal position
C
The length of the mercury column becomes shorter in the horizontal position than in the vertical position
D
The length of the mercury column becomes shorter in the vertical position than in the horizontal position
E
The pressure of the entrapped air is atmospheric in both cases.
Verified Correct Answer: B.
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #42923)