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OpenStudy (anonymous):
can someone check if i did this right? Question: Derive a formula for the mass of a planet in terms of its radius, r, the acceleration due to gravity at its surface, gp, and the gravitational constant, G.
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OpenStudy (anonymous):
this is my answer: \[g _{p}= F _{grav}/ m =GM _{p}/r ^{2} ---> M _{p} = g _{p}r ^{2}/g\]
OpenStudy (mos1635):
look's fine to me...
OpenStudy (anonymous):
Mp=gp*r*r/G
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