Question

What is the gas pressure inside the box shown in the figure?


What is the gas pressure inside the box shown in the figure?



Pa=_____

Answer 1

The pressure of the gas inside the box is

$$ P=P_{\text {asw }}-\rho g(\Delta h) $$

Here \(P_{\text {otm }}\) is the atmospheric pressure, \(\rho\) is density of mercury, \(g\) is acceleration due to gravity, \(\Delta h\) is the height diffrence.

$$ \begin{aligned} P &=101.3 \times 10^{3} \mathrm{~Pa}-\left(13600 \mathrm{~kg} / \mathrm{m}^{3}\right)\left(9.8 \mathrm{~m} / \mathrm{s}^{2}\right)(0.1 \mathrm{~m}) \\ &=8.8 \times 10^{4} \mathrm{~Pa} \end{aligned} $$