As a spaceship moving toward you at half the speed of light fires a probe toward you, relative to itself at 0.7 the speed of light, you see the probe approaching at about
A) 0.70c.
B) 0.87c.
C) 0.89c.
D) 0.92c.
E) 0.96c.
Answer: C
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Indicate whether the statement is true or false
Mort, who is standing on the ground, throws a ball at 20 m/s westward as measured by him. What is the ball's velocity relative to Velma, who is in a train moving eastward past Mort at 70 m/s?
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