Question

A Mercury barometer record a pressure of 0.70m of hg . What would be the height of water column if mercury in barometer is replaced by water

Answer 1

 Atmospheric pressure is given by P = hdg where h is the barometric height, d is density and g is acceleration due to gravity. 
Density of mercury is 13.6 times that of water.
The height of water column will be 13.6 times the mercury column. that is 9.52 m 

Answer 2

Answer:

Explanation:

Height of mercury in barometer : 0.70 m

If water is replaced by mercury then resulting reading : ?

Density of hg : 13600 kg/m^3

Density of water :1000kg /m^3

Height of water in barometer if replaced by mercury is

=>height of water =density of hg /density of water multiplied by height of mercury

=>h=13600/1000 x 0.70 => 13.6 x 0.70

= 9.52m

Therefore, the height of water when displaced by mercury is 9.52 m

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