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An air column 10cm in length is trapped into the sea end of a capillary tube by a 15cm ...

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An air column 10cm in length is trapped into the sea end of a capillary tube by a 15cm column of mercury with the tube held vertically as shown above. On inverting the tube the air column becomes 15cm long. The atmospheric pressure during the experiment is

A. 90cm
B. 76cm
C. 75cm
D. 60cm
E. 50cm




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