How mach would it cost to watch a football game for 3.0 h on a 325 W television described in ite

Name: Problem 42, Chapter 19: Holt Physics
Uploaded: 2020-10-05T18:31:24-08:00
Duration: 51 s
Channel: Manish Kumar
Description: How mach would it cost to watch a football game for 3.0 h on a 325 W television described in item 43 if electrical energy costs 0.08 / kW ·h ? (See Sample Problem 19 D, )

step 1 In this question we need to calculate the cost that caused when we used to watch television for

Question

How mach would it cost to watch a football game for $3.0 \mathrm{h}$ on a $325 \mathrm{W}$ television described in item 43 if electrical energy costs $\$ 0.08 / \mathrm{kW} \cdot \mathrm{h} ?$ (See Sample Problem 19 D, )

   How mach would it cost to watch a football game for $3.0 \mathrm{h}$ on a $325 \mathrm{W}$ television described in item 43 if electrical energy costs $\$ 0.08 / \mathrm{kW} \cdot \mathrm{h} ?$ (See Sample Problem 19 D, )

Holt Physics

Raymond A. Serway,… 1st Edition

Chapter 19, Problem 42

Instant Answer

Solved by Expert Manish Kumar

10/05/2020

Step 1

The energy used by an appliance is given by the product of its power rating and the time it is used. In this case, the power rating of the television is 325 W and it is used for 3 hours. Therefore, the total energy used is given by: \[E = P \times t = 325 \, Show more…

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How mach would it cost to watch a football game for $3.0 \mathrm{h}$ on a $325 \mathrm{W}$ television described in item 43 if electrical energy costs $\$ 0.08 / \mathrm{kW} \cdot \mathrm{h} ?$ (See Sample Problem 19 D, )

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Key Concepts

Electrical Energy Consumption

This concept involves calculating the energy used by an electrical device by multiplying its power (in watts or kilowatts) by the time it is operated (in hours). It provides the basis for determining how much electrical energy is consumed over a period, which is essential for estimating operating costs.

Unit Conversion

In problems involving power and energy, converting units is crucial. For example, converting wattage to kilowatts (by dividing by 1000) ensures that the energy consumption is expressed in kilowatt-hours, which is the standard unit used for billing by electric utilities.

Cost Calculation

Once energy consumption is determined in kilowatt-hours, cost calculation involves multiplying this amount by the electricity rate (in dollars per kilowatt-hour). This concept is used to evaluate the expense associated with using any electrical appliance over a given period.

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