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A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 50Â° with the normal to the wall. Each molecule in the beam has a speed of 2.8 km/s and a mass of 3.3 10-24 g. The beam strikes the wall over an area of 2.0 cm2, at the rate of 1023 molecules per second. What is the beam's pressure on the wall?

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