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# Superman meets an asteroid in outer space that is threatening to hit the Earth. He hurls it at 800 m/s, as fast as a bullet. The asteroid is a...

Superman meets an asteroid in outer space that is threatening to hit the Earth. He hurls it at 800 m/s, as fast as a bullet. The asteroid is a thousand times more massive than Superman. Using conservation of momentum, what would be his velocity after he threw the asteroid?