Estimate how long the Sun would last if it were merely a huge fire that was releasing chemical energy. Assume that the Sun begins with roughly 108 joules per kilogram, a chemical energy content typical of atomic matter.

Answer : The time will be,

Explanation :

Formula used :

Given:

Energy = 10⁸ joules

Mass of sun =  

Power =

Now put all the given values in the above formula, we get:

Thus, the time will be,

i think it's c. i'm not sure but i think so.

there is none because earth is stationary and flat.