The sun radiates energy at a rate of 4x1026 W. (1Watt=1J/sec) a) At what rate is the sun’s mass decreasing?

Question

b) How long does it take the sun to lose mass equal to that of the earth?

Thanks

Answer 1

The sun converts mass into energy through nuclear fusion.

E = mc^2

so 4 x 10^26 J / s = ( m ) ( 3.0 x 10^8 m /s )^2

Solve for m, the change of mass of the sun, in kg, in one second.