(a) What is the speed (in m/s) of spaceship B relative to spaceship A? (Enter your answer to at least three significant figures.)  ?m/s (b) What is the length (in m) of spaceship A as measured by astronauts on spaceship B?  ?m

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Two identical spaceships with proper lengths of 178 m are launched from Earth. Spaceship A is launched in one direction at 0.443c and spaceship B is launched in the opposite direction at 0.806c.
(a)
What is the speed (in m/s) of spaceship B relative to spaceship A? (Enter your answer to at least three significant figures.)
 ?m/s
(b)
What is the length (in m) of spaceship A as measured by astronauts on spaceship B?
 ?m
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