F04s(2) - Physics 4A THIRD EXAM Chapters 1 11 Fall 2004 Name Solve the following problems in the space provided Use the back of the page if needed

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Physics 4A THIRD EXAM Chapters 1 - 11 Fall 2004 1 Name:_________________________________________ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 20 points. You must show your work in a logical fashion starting with the correctly applied physical principles shown on the last page. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. It turns out that neutrons are not stable particles. A neutron will decay into a proton and an electron. The mass of a proton is 1833 times the mass of an electron. Suppose a neutron, initially at rest, breaks apart into an electron and a proton. The total kinetic energy of the electron and proton together is K. Find (a)the net momentum of the electron and the proton as a system and (b)the kinetic energy of the proton by itself as a fraction of the total kinetic energy. (a)Since the neutron is initially at rest, the total momentum of the system is zero before the decay. By the Law of Conservation of Momentum, the momentum of the proton plus the electron will also be zero after the decay. (b)Applying the Law of Conservation of Momentum,
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This note was uploaded on 03/11/2012 for the course PHYSICS 204A taught by Professor Kagan during the Fall '09 term at CSU Chico.

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F04s(2) - Physics 4A THIRD EXAM Chapters 1 11 Fall 2004 Name Solve the following problems in the space provided Use the back of the page if needed

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