Quiz #1: Relativity February 5, 2007 Name: __SOLUTION__ Complete both of the following problems. Show all of your work for full credit. Problem 1The lifetimeof 62Heis 807 ms and it is traveling at 0.9crelative to Earth. Can it travel the distance from Moon to Earth (384,400 km) before decaying? Show your work.First, use time dilation to find the particle’s lifetime ∆tin your earth frame. Then, calculate the distance it travels using its speed and lifetime in your frame. ()22288811'2.294 0.807 s1.851swhere2.294110.90.9 3 10 m/s 1.851s5 10 m > 3.84 10 mttvcxvtγγ∆=∆ =====−−∆=∆=×= ××Yes, the particle will travel the distance before decaying. Problem 2A missile is launched along y axis with a speed 0.98
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This homework help was uploaded on 04/22/2008 for the course PHYS 320 taught by Professor Baski during the Spring '04 term at VCU.