The average rate at which solar radiant energy reaches Earth is approximately 1.4 X 103 W/m2. Assume

Question:

The average rate at which solar radiant energy reaches Earth is approximately 1.4 X 103 W/m2. Assume that all this energy results from the conversion of mass to energy. Calculate the rate at which the solar mass is being lost. If this rate is maintained, calculate the remaining lifetime of the Sun.