A Brass Rod Is Placed Between Two Temperature Sources So $^{\circ}$

question 62

Multiple Choice

A brass rod is placed between two temperature sources so that heat can flow between them.One temperature is 80 $^{\circ}$ C and the other temperature is 20 $^{\circ}$ C.The length of the rod is 50.0 cm and the cross sectional area is 15.0 cm².If the coefficient of thermal conduction for brass is 100 W/m $^{\circ}$ C,then what is the heat flow between the hot temperature and the cold temperature?

• A) 7.5 W
• B) 8.2 W
• C) 9.4 W
• D) 12 W
• E) 18 W

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Definitions:

Primary Root

The initial root that develops from a germinating seed, giving rise to the root system of a plant.

Hemicellulose

A polysaccharide found in plant cell walls alongside cellulose, providing structural support.

Cellulose

A complex carbohydrate composed of glucose units that form the main constituent of the cell wall in most plants, providing structural support.

Soluble

Capable of being dissolved in a solvent, typically water, to form a solution.