Two astronauts, with masses 60. and 80. kg, are initially at rest in outer space. They push each other apart. How far has the heavier astronaut moved when the lighter astronaut has moved 12. m?
A) 12. m
B) 9.0 m
C) 16. m
D) 21. m
E) 7.0 m
B
Physics & Space Science
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