Suppose a spaceship heading straight towards the Earth at 0.75c can shoot a canister at 0.55c...

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Suppose a spaceship heading straight towards the Earth at 0.75c can shoot a canister at 0.55c...

Suppose a spaceship heading straight towards the Earth at 0.75c can shoot a canister at 0.55c relative to the ship.

A) If the canister is shot directly at Earth, what is the ratio of its velocity, as measured on Earth, to the speed of light?

B) What about if it is shot directly away from the Earth (again, relative to c)?

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Suppose a spaceship heading straight towards the Earth at 0.75c can shoot a canister at 0.55c...

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