A star of radius R and mass M is moving with velocity v through a cloud of particles of density rho.
If the particles that collide with the star are trapped by it, show that the mass of the star will increase at rate:
dM/dt = Pi * rho * v * (R^2 +2GMR/v^2)
Show how the cross sectional area compares with the geometric cross section of a hard sphere.© BrainMass Inc. brainmass.com October 9, 2019, 10:15 pm ad1c9bdddf
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