Unto
Nov30-09, 05:21 PM
1. The problem statement, all variables and given/known data
...Hence show that the mass of the star is M = 4\pip_{c}\left(R^{3}/3 )
2. Relevant equations
M(r) = 4 \pip_{c}\left(r^{3}/3 - r^{4}/4R)
This is the shell mass
3. The attempt at a solution
I already found the shell mass via intergration, and I know that I have to build up an 'infinite' number of shells to get the whole mass of the star. But do I use integration or something else? What do I do?
...Hence show that the mass of the star is M = 4\pip_{c}\left(R^{3}/3 )
2. Relevant equations
M(r) = 4 \pip_{c}\left(r^{3}/3 - r^{4}/4R)
This is the shell mass
3. The attempt at a solution
I already found the shell mass via intergration, and I know that I have to build up an 'infinite' number of shells to get the whole mass of the star. But do I use integration or something else? What do I do?