- #1
beavez
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Homework Statement
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!