Asked by daniela

The sun radiates energy at the rate of 3.92x 10^26 W. (a) What is the change in the sun's mass in one second? (b)How much mass does the sun lose in the lifetime of your average earthling (say, 75 years)?

Answers

Answered by drwls
(a) Use Einstein's equation
E = m c^2

The mass loss rate is
1/c^2 * (Energy loss rate)

(b) Mass loss = (Mass loss rate)* T
where T = 75 years, expressed in seconds

75 y = 2.37*10^9 s
Use the mass loss rate that you calculate for (a)
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