A spaceship that is 50 m long as measured by its occupants is traveling at a speed of 0.1c relative to the Earth. How long is the spaceship as measured by mission control in Houston? (See table 20.1.) 

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table 20.1 Values of y for Different Values of Relative Speed v v = 0.010 y = 1.000 05 V V = 0.1c Y = 1.005 Y = 1.155 Y = 1.250 Y = 1.667 V - 0.5c V = 0.6c %3! V = 0.8c V = 0.9c 2.294 V = 0.99c Y = 7.088