Question

Determine the atmospheric pressure at a location where the barometric reading is 760 mm Hg and the gravitational acceleration is g=9.81m/s^2. Assume the temperature of mercury to be 10°C, at which its density is 14000 kg/m3

Answer 1

The atmospheric pressure is found to be
`104.378kPa`

Step-by-step explanation:

We know that pressure exerted by a standing column of fluid is calculated using the equation

`P=\rho _(fluid)* gh`

In our case the pressure of the standing column of mercury is equal to the atmospheric pressure.

According to the given data we have

`\rho _(fluid)=14000kg/m^(3)`

`g=9.81m/s^(2)`

`h=760mm=0.76m`

Using the values in the equation above we calculate atmospheric pressure to be

`P_(atm)=14000* 9.81* 0.760\\\\=104.378kPa`