Suppose the bulb in a two-cell flashlight draws 4 W of power. The batteries go dead in
Question:
Suppose the bulb in a two-cell flashlight draws 4 W of power. The batteries go dead in 45 min and cost $7.99.
(a) How many kilowatt-hours of energy can be supplied by the two batteries?
(b) What is the cost per kilowatt-hour of energy if the batteries cannot be recharged?
(c) If the batteries can be recharged at a cost of 9 cents per kilowatt-hour, what is the cost of recharging them?
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Related Book For
Fundamentals of Ethics for Scientists and Engineers
ISBN: 978-0195134889
1st Edition
Authors: Edmund G. Seebauer, Robert L. Barry
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