ps6 - Physics 152S Winter 2012 Problem set # 6 Due...

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Physics 152S Winter 2012 Problem set # 6 Due Wednesday April 4th by 5pm Hand in to your TA’s mailbox in the basement. Note: Make sure to put your name, student number, section number (eg T0102B) and TA’s name at the top of your problem set. Also, show your work, be neat, and label any graphs or figures if necessary. Only two of the following questions, or parts of questions, will be marked. 1. A moving rod is observed to have a length of L = 2 . 00 m and to be oriented at an angle of θ = 30 . 0 with respect to the direction of motion as shown in the figure. The rod has a speed of 0 . 995 c . (a) What is the proper length of the rod? (b) What is the orientation angle in the proper frame? θ Direction of motion L 2. Some of the highest energy cosmic rays are protons that have relativistic γ factors of around γ = 10 10 . (a) What speed would a particle with γ = 10 10 have? Give your answer as v = (1 - ϵ ) c (i.e. find ϵ ). A cosmic ray with
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ps6 - Physics 152S Winter 2012 Problem set # 6 Due...

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