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You can see a clock in a spaceship moving past you at 90 percent of the speed of light. according to you, how much time would pass while the clock in the spaceship ticked through one minute?

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[tex]t = \gamma\tau, \textnormal{ where } \gamma \equiv \frac{1}{\sqrt{1-\frac{v^2}{c^2}}}, \textnormal{ }\tau \textnormal{ is the proper time 60s} \\ t = \frac{60s}{\sqrt{1-0.9^2}} = 137.65s \textnormal{ } (5 s.f.)[/tex]

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