Power (Problem 40)

(a) What is the available energy content, in joules, of a battery that operates a 2.00-W electric clock for 18 months? (b) How long can a battery that can supply $8.00\times {10}^4\text{J}$ run a pocket calculator that consumes energy at the rate of $1.00\times {10}^{-3}\text{ W}$? Select the answer to part (a).