A Metal Rod Is Placed Between Two Temperature Sources So

question 3

Multiple Choice

A metal rod is placed between two temperature sources so that heat can flow between them. One temperature is 90.0 °C and the other temperature is 25.0 °C. The length of the rod is 30.0 cm and the cross-sectional area is 10.0 cm². If 15.0 watts of heat flows between the hot temperature and the cold temperature, then what is the thermal conductivity for the metal?

• A) 69.2 W/(m·°C)
• B) 58.2 W/(m·°C)
• C) 50.4 W/(m·°C)
• D) 46.3 W/(m·°C)
• E) 44.2 W/(m·°C)

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Definitions:

Market Power

The ability of a firm to influence or control the price and quantity of goods or services in a market.

Marginal Revenue

The additional income obtained from selling one more unit of a product or service.

Demand Schedule

A table that shows the quantity of a good or service that consumers wish to buy at each price level.

Output

The quantity of goods or services produced by a firm, industry, or economy in a given period.