# Physics Atmospheric pressure(barometer) doubt!? Calculate the change of atmospheric pressure, in pascals, that would cause the mercury in a barometer to rise by 1mm. Use density of...

Physics Atmospheric pressure(barometer) doubt!?

Calculate the change of atmospheric pressure, in pascals, that would cause the mercury in a barometer to rise by 1mm.

Use density of mercury=13600(kgm^-3)

Please explain in detail;thank you very much!!!:-)

### 2 Answers | Add Yours

Here change in hight h =1 mm = (1/1000) m

denisity of mercury d =13600Kg/m^3

aceeleration due to gravity g= 9.8 m/sec^2

Atmospheric presure = h d g

=(1/1000) (13600) (9.8) (N/m^2)

=133.28 N/m^2

1 Pascal Pressure:When a force of 1N acts on area of one merter square ( 1 m2 ) , the pressure produced is called 1 pascal.

1 Pa= 1N/m^2

change in atomospheric presure=133.28 N/m^2

=133.28 Pa

Thank you very much

Here change in hight h =1 mm = (1/1000) m

denisity of mercury d =13600Kg/m^3

aceeleration due to gravity g= 9.8 m/sec^2

Atmospheric presure = h d g

=(1/1000) (13600) (9.8) (N/m^2)

=133.28 N/m^2

**1 Pascal Pressure:**

When a force of 1N acts on area of one merter square ( 1 m2 ) , the pressure produced is called 1 pascal.

1 Pa= 1N/m^2

change in atomospheric presure=133.28 N/m^2

=133.28 Pa