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

For a star of mass M and radius R, the density increases from the centre to the surface as a function of radial distance r, according to

[tex]\rho = \rho_{c}[1-(\frac{r}{R})^2][/tex]

where is the central density constant.

a) Find M(r).

b) Derive the relation between M and R and show that the average density of the star is .

i know that D=M/V

so M = D.V ; i simply substiuted the Given Density and the volume by 4Pi/3r^3

but somethin is wrong!

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Density of a star

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