As a spaceship moves away from you at half the speed of light, it ...

[sc00by25]

As a spaceship moves away from you at half the speed of light, it fires a probe, also away from you at half the speed of light relative to the spaceship. Relative to you, the probe moves at
 
  A) 0.80c.
  B) 0.87c.
  C) 0.90c.
  D) 0.95c.
  E) c.

Question 2

When we apply the Lorentz factor  to length contraction, we
 
  A) multiply by  as in the equation for time dilation.
  B) multiply by the reciprocal of
  C) find it does not apply.

[leahchrapun]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: B

[sc00by25]

Thanks

[leahchrapun]

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