The same laptop battery (11.4 V, 8.3 W) can run for 5.0 h before depletion. How much energy, in joules, is this battery capable of supplying?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Study for the UCF PHY2054 General Physics Exam. Use flashcards and multiple-choice questions complete with hints and explanations. Boost your understanding and get exam-ready!

Multiple Choice

The same laptop battery (11.4 V, 8.3 W) can run for 5.0 h before depletion. How much energy, in joules, is this battery capable of supplying?

Explanation:
Energy delivered equals power times time. The battery provides 8.3 W for 5.0 hours. Convert hours to seconds: 5.0 h × 3600 s/h = 18,000 s. Multiply: 8.3 W × 18,000 s = 149,400 J. So the battery can supply 149,400 joules. The voltage isn’t needed for this calculation, though it would imply a current of about 0.73 A (I = P/V).

Energy delivered equals power times time. The battery provides 8.3 W for 5.0 hours. Convert hours to seconds: 5.0 h × 3600 s/h = 18,000 s. Multiply: 8.3 W × 18,000 s = 149,400 J. So the battery can supply 149,400 joules. The voltage isn’t needed for this calculation, though it would imply a current of about 0.73 A (I = P/V).

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy