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LED bulbs are much more efficient at producing light than are traditional incandescent bulbs. They initially cost much more, but last far longer and use much less electricity An LED bulb that produces as much light as a 100 W incandescent bulb uses only 12.5 W of power. The LED bulb lasts 15,000 hours, on the average, and costs £8.00, whereas the cost of an incandescent bulb was only £0.75, but it lasted just 750 hours. Assume that electricity costs £0 122 per kilowatt-hour and that the bulbs are on for 4.0 h per day Part A What is the total cost (including the price of the bulbs) to run incandescent bulbs for 3 0 years? Express your answer in pounds. ? Submit Request Answer Part B What is the total cost (including the price of the bulbs) to run the LED bulbs for 3.0 years? Express your answer in pounds. Πνα ΑΣΦ 3. Submit Request Answer

LED bulbs are much more efficient at producing light than are traditional incandescent bulbs. They initially cost much more, but last far longer and use much less electricity An LED bulb that produces as much light as a 100 W incandescent bulb uses only 12.5 W of power. The LED bulb lasts 15,000 hours, on the average, and costs £8.00, whereas the cost of an incandescent bulb was only £0.75, but it lasted just 750 hours. Assume that electricity costs £0 122 per kilowatt-hour and that the bulbs are on for 4.0 h per day Part A What is the total cost (including the price of the bulbs) to run incandescent bulbs for 3 0 years? Express your answer in pounds. ? Submit Request Answer Part B What is the total cost (including the price of the bulbs) to run the LED bulbs for 3.0 years? Express your answer in pounds. Πνα ΑΣΦ 3. Submit Request Answer

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LED bulbs are much more efficient at producing light than are traditional incandescent bulbs. They initially cost much more, but last far longer and use much less electricity An LED bulb that produces as much light as a 100 W incandescent bulb uses only 12.5 W of power. The LED bulb lasts 15,000 hours, on the average, and costs £8.00, whereas the cost of an incandescent bulb was only £0.75, but it lasted just 750 hourS. Assume that electricity costs £0 122 per kilowatt-hour and that the bulbs are on for 4.0 h per day. Part A What is the total cost (including the price of the bulbs) to run incandescent bulbs for 3.0 years? Express your answer in pounds. ΑΣΦ Submit Request Answer Part B What is the total cost (including the price of the bulbs) to run the LED bulbs for 3.0 years? Express your answer in pounds. ΑΣΦΦ Submit Request Answer
Transcribed Image Text:LED bulbs are much more efficient at producing light than are traditional incandescent bulbs. They initially cost much more, but last far longer and use much less electricity An LED bulb that produces as much light as a 100 W incandescent bulb uses only 12.5 W of power. The LED bulb lasts 15,000 hours, on the average, and costs £8.00, whereas the cost of an incandescent bulb was only £0.75, but it lasted just 750 hourS. Assume that electricity costs £0 122 per kilowatt-hour and that the bulbs are on for 4.0 h per day. Part A What is the total cost (including the price of the bulbs) to run incandescent bulbs for 3.0 years? Express your answer in pounds. ΑΣΦ Submit Request Answer Part B What is the total cost (including the price of the bulbs) to run the LED bulbs for 3.0 years? Express your answer in pounds. ΑΣΦΦ Submit Request Answer
LED bulbs are much more efficient at producing light than are traditional incandescent bulbs. They initially cost much more, but last far longer and use much less electricity. An LED bulb that produces as much light as a 100 W incandescent bulb uses only 12.5 W of power. The LED bulb lasts 15,000 hours, on the average, and costs £8.00, whereas the cost of an incandescent bulb was only £0.75, but it lasted just 750 hours. Assume that electricity costs £0.122 per kilowatt-hour and that the bulbs are on for 4.0 h per day. Part C How much do you save over 3.0 years if you use an LED bulb instead of an incandescent bulb? Express your answer in pounds. ΑΣφ Submit Request Answer Part D What is the resistance of a "100 W" LED bulb? (Remember, it actually uses only 12.5 W of power and operates across 230 V.) Express your answer in ohms. ? R = Submit Pegueet Answer t ||
Transcribed Image Text:LED bulbs are much more efficient at producing light than are traditional incandescent bulbs. They initially cost much more, but last far longer and use much less electricity. An LED bulb that produces as much light as a 100 W incandescent bulb uses only 12.5 W of power. The LED bulb lasts 15,000 hours, on the average, and costs £8.00, whereas the cost of an incandescent bulb was only £0.75, but it lasted just 750 hours. Assume that electricity costs £0.122 per kilowatt-hour and that the bulbs are on for 4.0 h per day. Part C How much do you save over 3.0 years if you use an LED bulb instead of an incandescent bulb? Express your answer in pounds. ΑΣφ Submit Request Answer Part D What is the resistance of a "100 W" LED bulb? (Remember, it actually uses only 12.5 W of power and operates across 230 V.) Express your answer in ohms. ? R = Submit Pegueet Answer t ||
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