(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A spherical star of uniform density p and radius R is formed by the condensation of the interstellar dust from large distance due to gravitational forces. Find the energy change that occurs at some intermediate stage as the radius increases from r to r+dr

Hence derive an expression for the total loss of the gravitational energy during the condensation

2. Relevant equations

3. The attempt at a solution

I don't quite understand this question. It mentions that the radius of star increases from r to r+dr, but the question ask for loss of gravitational potential energy during condensation. So does the star expand or contract? I don't know what the question is trying to ask. Can someone explain to me？ Thanks

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# Homework Help: Loss in gravitational energy during condensation of star

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