Your utility company charges 15 cents per kilowatt-hour of electricity. Complete parts (a) and (b) below. a. What is the daily cost of keeping lit a 60-watt light bulb for 10 hours each day? b. How much will you save in a year if you replace the bulb with an LED bulb that provides the same amount of light using only 15 watts of power? a. The daily cost of keeping lit a 60-watt light bulb for 10 hours each day is $ 0.090 (Round to three decimal places as needed.) b. The yearly savings of replacing the 60-watt light bulb with a 15-watt light bulb is $ (Round to two decimal places as needed.)
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Energy consumption (in kilowatt-hours) = Power (in kilowatts) × Time (in hours) For the 60-watt light bulb: Power = 60 watts = 0.06 kilowatts Time = 10 hours Energy consumption = 0.06 kW × 10 hours = 0.6 kWh For the LED bulb: Power = 16 watts = 0.016 Show more…
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