Answer to Question #154646 in Molecular Physics | Thermodynamics for Ronak

Question

Calculate energy required to pump atmospheric air in a cube of 10*10*10 so that it weight 10 kg more that the initial without change in volume

Answer 1

Answer

Given data

Initial velocity is zero.

Initial volume=1000m^3

Initial pressure=1.01$\times10^5Pa$

Using Bernoulli’s principle equation

$P_0+\rho v_0^2/2+\rho gh=constant$

$1.01\times10^5+\frac{10\times10\times10}{1000}=100000J$