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A star can be considered as a shpherical...

A star can be considered as a shpherical ball of hot gas of radius R.Inside the star the density of the gas is `rho_r` at a radius r and mass of the gas within this region is `M_r`.The correct differential equation for variation of mass with respect to radius `((dM_r)/(dt))` is (refer to the adjacent figure)

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The correct Answer is:
`P_C=(GM_0^2)/(R_0^4)xx(3/(2pi))`
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