The temperature at the surface of the Sun is approximately 5,200 K, and the temperature at the surface of the Earth is approximately 295 K. What entropy change of the Universe occurs when 4.50 103 J of energy is transferred by radiation from the Sun to the Earth

To solve this problem, we will calculate the entropy for both cases, remembering that the concept of entropy is the relationship between the heat released / gained and the temperature. After calculating the entropy in the sun and on the earth we will find the difference between the two. So that,

Entropy at Sun

Replacing,

The entropy at Earth,

The values are,

Replacing at the equation,

Then the total change in entropy will be,

Therefore the entropy change is

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.