A futuristic spaceship flies past MARS with a speed of 0.65c relative to the surface of MARS. Inside the spaceship, a pendulum is swinging. Each swing takes 1.60 seconds as measured by an astronaut performing an experiment inside the spaceship.        (a) How long will each swing take as measured by a technician at mission control on  MARS watching that experiment?

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A futuristic spaceship flies past MARS with a speed of 0.65c relative to the surface of MARS. Inside the spaceship, a pendulum is swinging. Each swing takes 1.60 seconds as measured by an astronaut performing an experiment inside the spaceship.
       (a) How long will each swing take as measured by a technician at mission control on  MARS watching that experiment? 

       (b) Suppose a person on the spaceship measures a bench on the ship and finds the length to be Lp = 3.20 m along the direction of motion.  What would be the length of the bench to a technician at mission control on MARS?

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