There are approximately 104 million TVs in the United States. Each uses, on average, 77 W of power and is turned on for 6.4 hours aday. If electrical energy costs 0.091 dollars per kWh, how much money is spent every day in keeping the TVs turned on?

Given: Number of TVs are n=104 million=104×106 On average each TV uses power P=77 W Time is t=6.4…

Answered: how much money is spent every day in…

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how much money is spent every day in keeping the TVs turned on?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter22: Electric Current

Section: Chapter Questions

Problem 93A

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Question

There are approximately 104 million TVs in the United States. Each uses, on average, 77 W of power and is turned on for 6.4 hours a
day. If electrical energy costs 0.091 dollars per kWh, how much money is spent every day in keeping the TVs turned on?

Expert Solution

Step 1

Given:

Number of TVs are $n = 104 million = 104 \times 10^{6}$

On average each TV uses power $P = 77 W$

Time is $t = 6.4 hours$

Electrical cost is $0.091 dollars per kWh$

Note:

$1 kW = 1000 W$

Find:

Electrical cost of all TVs everyday.

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