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My Note A spaceship is moving at a speed ot 0.9c away from an observer at rest. A boy in the spaceship shoots a proton gun with protons having a speed of 0.2c. (a) What is the speed of the protons measured by the observer at rest when the gun is shot away from the observer? (b) What is the speed of the protons measured by the observer at rest when the gun is shot toward the observer? O Type here to search F4 F5 F10 5 6 8 5 G H IJ
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