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?
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A.
The length of the entrapped air in the horizontal position is less than that in the vertical position
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B.
The length of the entrapped air in the vertical position is less than that in the horizontal position
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C.
The length of the mercury column becomes shorter in the horizontal position than in the vertical position
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D.
The length of the mercury column becomes shorter in the vertical position than in the horizontal position
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E.
The pressure of the entrapped air is atmospheric in both cases.
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NECO
2003
