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(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 $8.00\times 10^{4}\textrm{ J}$ run a pocket calculator that consumes energy at the rate of $1.00\times 10^{-3}\textrm{ W}$?
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Final Answer
  1. $94.6\textrm{ MJ}$
  2. $2.54 \textrm{ years}$
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OpenStax College Physics Solution, Chapter 7, Problem 40 (Problems & Exercises) (1:43)

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