A neon sign in front of a caf ashes on and off once every
Chapter 29, Problem 6(choose chapter or problem)
A neon sign in front of a caf ashes on and off once every 4.1 s, as measured by the head cook. How much time elapses between ashes of the sign as measured by an astronaut in a spaceship moving toward Earth with a speed of 0.84c?
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