What Is the Net Power That a Person with Surface

question 14

Multiple Choice

What is the net power that a person with surface area of 1.20 m² radiates if his emissivity is 0.895, his skin temperature is 300 K, and he is in a room that is at a temperature of 290 K? The Stefan-Boltzmann constant is 5.67 x 10^-8 W/(m²·K⁴) .

• A) 60.3 W
• B) 62.6 W
• C) 65.7 W
• D) 68.4 W
• E) 64.8 W

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Definitions:

Investment

The action of designating capital with the intention of securing an income or a financial return.

Interest Rate

The amount charged, expressed as a percentage of principal, by a lender to a borrower for the use of assets.

Economic Profit

The distinction between total sales and the aggregate of both explicit and implicit expenses for a firm.