In a certain city, electricity costs $0.13
per kW⋅h.
What is the annual cost for electricity to power a lamppost for 8.00 h
per day with a 100. W
incandescent light bulb versus an energy efficient 25 W
fluorescent bulb that produces the same amount of light? Assume 1 year=365 days.
100. W
bulb: $
/year
25 W
bulb: $
/year
hours per day with (a) a 100.-watt incandescent light bulb (b) an energy efficient 25-watt fluorescent bulb that produces the same amount of light? assume 1 year = 365 days.
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