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Molecular collisions: 1

Page history last edited by Joe Redish 9 years, 8 months ago
4.3.1.P4

 

  Two atoms collide while moving in a gas. The larger atom has a mass M1 = 6 Daltons and a speed v1 = 200 m/s, while the smaller has a mass M2 = 1 Daltons. During the collision both atoms simply bounce off each other. They do not change their speeds, but after the collision they each reverse their directions, bouncing straight back. (You may express your results using the mass unit “Daltons”.)

A. What is the magnitude of the change in the momentum, Δp1, of mass M1? Show your reasoning.

 

B. What is the change in the total momentum of the pair? Explain how you know.

 

C. What is the magnitude of the change in the momentum Δp2, of mass M2? Show your reasoning.

 

D. What speed does mass M2 have to have in order for this collision to take place as shown?

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