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7.7 Exercise 14

Avg difficulty 2.5

(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 8.00×104J8 . \text{00} \times \text{10}^{4} \text{J} run a pocket calculator that consumes energy at the rate of 1.00×10−3 W1 . \text{00} \times \text{10}^{- 3} \text{ W}?

OpenStax College Physics 2e, 7.7 Power, exercise 14

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.