The intensity of solar radiation reaching the illuminated side of the Earth each second is J = 1.36 kW//m^2. Find the docrease in the internal energy and the muss of tho Sun per second. How long will it take for the Sun's mass to decrease due to radiation by 10% ? The volume of the Sun is to be assumed to remain constant.

The intensity of solar radiation reaching the illuminated side of the

1.	The intensity of solar radiation reaching the illuminated side of the Earth each second is J = 1.36 kW//m^2. Find the docrease in the internal energy and the muss of tho Sun per second. How long will it take for the Sun's mass to decrease due to radiation by 10% ? The volume of the Sun is to be assumed to remain constant.
Answer» SOLUTION :Multiplying the solar constant by the AREA of a sphere of radius equal to the astronomical unit, we obtain the total power of solar radiation `P= 4piJR^2` . The loss of mass per second in `mu=P//c^2` The SUN will lose TEN percent of its mass in the time `TAU=(0.1M_(o.))/mu=(M_(o.)c^2)/(40piJR^2)`

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