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To construct a barometer , a tube of lkength 1 m is is filled completely with mercury and is inverted in a mercury cup . The barometer reading on a particular day is 76 cm. Suppose a 1m mercurry tube is filled with 76 cm and thetn closed by a cork , it is inverted in a mercury cup and the cork is removed. the height of mercury column in the tube over the surface in the cup willbe a)0 b)76 cm c) d)>76 cm

To construct a barometer , a tube  of lkength 1 m is is filled completely with mercury and is inverted in a mercury cup . The barometer reading on a  particular day is 76 cm. Suppose a 1m mercurry tube is filled with 76 cm and thetn closed by a cork , it is inverted in a mercury cup and the cork is removed. the height of mercury column in the tube over the surface in the cup willbe 
a)0
b)76 cm
c)
d)>76 cm

Grade:11

1 Answers

Vikas TU
14149 Points
7 years ago
Due to not fully filled of the tube it would have some atmospheric pressure due to that the height of the mercury should be less than the 76 cm column.
 

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