A Windowpane Is Half a Centimeter Thick and Has an Area

question 43

Multiple Choice

A windowpane is half a centimeter thick and has an area of 1.0 m².The temperature difference between the inside and outside surfaces of the pane is 15 $\degree$ C.What is the rate of heat flow through this window? (Thermal conductivity for glass is 0.84 J/s*m* $\degree$ C. )

• A)50 000 J/s
• B)2 500 J/s
• C)1 300 J/s
• D)630 J/s

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Definitions:

Fixed Costs

Financial obligations such as rent, salaries, and insurance that do not fluctuate with changes in production or sales levels.

Contribution Margin

The amount remaining from sales revenue after variable costs have been deducted, used to cover fixed costs and generate profit.

Margin of Safety

The difference between actual sales and the break-even point, indicating how much sales can fall before a business incurs a loss.

Dollars

The currency unit of the United States, often used to represent money or economic transactions.