A standard flashlight battery can deliver about 2.0 Wh of energy before it runs down. (a) If a battery costs US$0.80, what is the cost of operating a 100 W lamp for 8.0 h using batteries? (b)What is the cost if energy is provided at the rate of US$0.06 per kilowatt-hour?
Ohm's law
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In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
A standard flashlight battery can deliver about 2.0 Wh of
energy before it runs down. (a) If a battery costs US$0.80, what is
the cost of operating a 100 W lamp for 8.0 h using batteries?
(b)What is the cost if energy is provided at the rate of US$0.06 per
kilowatt-hour?
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For (b), why do we divide the (100Wx8h) by (103Wh)? I get that we need to cancel out the Wh, but why do we divide by 103 specifically?
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