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1. A home uses twenty 60W, 2% efficient incandescent bulbs, which are all 'on' anaverage of 4 hours daily. a) find the annual energy use b) what wattage would be required for a 15% efficient LED light to produce the same illumination as the 60 W?

1. A home uses twenty 60W, 2% efficient incandescent bulbs, which are all 'on' anaverage of 4 hours daily. a) find the annual energy use b) what wattage would be required for a 15% efficient LED light to produce the same illumination as the 60 W?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1. A home uses twenty 60W, 2% efficient incandescent bulbs, which are all 'on' anaverage of 4 hours daily. a) find the annual energy use b) what wattage would be required for a 15% efficient LED light to produce the same illumination as the 60 W? 2. With 4 showers a day, each 7 minutes long at 38°C: a) what is the annual energy use for a 60% efficient gas water heater, assuming a water input temperature of 5° and 10 L/minute usage.
Transcribed Image Text:1. A home uses twenty 60W, 2% efficient incandescent bulbs, which are all 'on' anaverage of 4 hours daily. a) find the annual energy use b) what wattage would be required for a 15% efficient LED light to produce the same illumination as the 60 W? 2. With 4 showers a day, each 7 minutes long at 38°C: a) what is the annual energy use for a 60% efficient gas water heater, assuming a water input temperature of 5° and 10 L/minute usage.
Frequenty Editing Question 1 The histogram shows the distribution of the number of televisions in the homes of 91 community college students. Complete a through e below. 25 20- 10- Number of TVs
Transcribed Image Text:Frequenty Editing Question 1 The histogram shows the distribution of the number of televisions in the homes of 91 community college students. Complete a through e below. 25 20- 10- Number of TVs
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