The mercury column in a simple mercury barometer is of height 5m above the mercury in a reservoir. If the tube is replaced with one whose radius is twice that of the first tube, what will be the height of the mercury column in the new tube?
A.
2.5m
B.
5.0m
C.
7.5m
D.
10.0m
E.
20.0m
Correct Answer: Option A
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