A vacuum pump lowers the pressure inside a chamber by of mercury below atmospheric…

PHYSICS · Single correct · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

A vacuum pump lowers the pressure inside a chamber by

40\,\text{cm}

of mercury below atmospheric pressure. Atmospheric pressure is

760\,\text{mm Hg}

. Taking

\rho_{Hg}=13.6\times10^{3}\,\text{kg\,m}^{-3}

and

g=9.8\,\text{m\,s}^{-2}

, determine the absolute pressure inside the chamber (in pascals). (a)

9.6\times10^{4}\,\text{Pa}

(b)

3.6\times10^{4}\,\text{Pa}

(c)

4.8\times10^{4}\,\text{Pa}

(d)

5.3\times10^{4}\,\text{Pa}