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Author Question: How much energy does a 100 watt light bulb use in 1 hour? Express your answer in (a) joules and in ... (Read 124 times)

Marty

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on: Jul 28, 2018
How much energy does a 100 watt light bulb use in 1 hour? Express your answer in (a) joules and in (b) kilowatt-hours. (c) Also find how much money it costs if electricity sells for 10 cents per kW-h.

Question 2

The light bulb used in a slide projector draws a current of 4 amperes when operating on 120 volts. (a) What is the bulb's resistance? (b) What is the bulb's power consumption?


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daiying98

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Reply #1 on: Jul 28, 2018
Answer to Question 1

(a) 360,000 J, (b) 0.1 kW-h, (c)1 cent

Answer to Question 2

(a) 5 amperes, (b) 2.4 ohms


Marty

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Reply #2 on: Jul 28, 2018
Thank you!


daiying98

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Reply #3 on: Jul 28, 2018
Always glad to help...


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