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