Question

the atmosphere of town A is 50cmHg while at sea level the pressure is 76cmHg.Calculate the altitude of the town given that the density of air is1.25 kg/m3

Answer 1

Explanation:

The pressure will be same whether the mercury is used or water is use, there is only a difference in density of liquid and height of Fluid.

For mercury, height is 76cm.

∴pressure=hpg

=76×13.6×g

where 13.6g/cm

2

is the density of mercury.

Now, let the height of the water column be h m.

∴p=h×pg, where density of water is 1g/cm

2

.

∴h×1=76×13.6

⇒h=1033.6cm.

∴h=10.336m.

We get, h=10.336m.