A meter stick is observed to be only 0.850 meters long to an inertial observer. At what speed, relative to the observer, must the meter stick be moving?
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L = L0/gamma
gamma = 1/0.85 = 1.1765
1-b^2 = 1/1.1765^2 = 0.7225
b = 0.5268
v = 0.5268*3x10^8 = 1.58x10^8 m/s
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