7. Two moons are a distance 2r from each other. One moon has mass 2m, and the other moon has mass 4m. What is the gravitational potential energy of the two-moon system? 4Gm? a. 4Gm? b. 8Gm? C. 2Gm d.
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other moon has mass 4m. What is the gravitational potential energy of the two-moon
system?
4Gm2
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b.
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C.
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