Halliday, Resnick & Walker — The Kinetic Theory of Gases: Problem 23

A beam of hydrogen molecules (\(H_2\)) is directed toward a wall, at an angle of \(55^{\circ}\) with the normal to the wall. Each molecule in the beam has a speed of \(1.0 \text{ km/s}\) and a mass of \(3.3 \times 10^{-24} \text{ g}\). The beam strikes the wall over an area of \(2.0 \text{ cm}^2\), at the rate of \(10^{23}\) molecules per second. What is the beam’s pressure on the wall?