The sun produces energy by nuclear fusion reactions, in which matter is converted into energy. By measuring the amount of energy we receive from the sun, we know that it is producing energy at a rate of 3.8 x 1026 w.
(a) How many kilograms of matter does the sun lose each second? Approximately how many tons of matter is this?
(b) At this rate, how long would it take the sun to use op all its mass?