On a Cold Winter Day, the Outside Temperature Is -20°C

question 20

Multiple Choice

On a cold winter day, the outside temperature is -20°C and the inside temperature is maintained at 20°C. There is a net heat flow to the outside through the walls, roof, etc., of 25 kW. At what rate is the air outside the house gaining entropy as a result of this process?

• A) 13 W/K
• B) 25 W/K
• C) 85 W/K
• D) 99 W/K
• E) 0 W/K

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Definitions:

Forging Process

A manufacturing technique involving the shaping of metal using localized compressive forces, often hammering or pressing.

Upper Control Limit

The highest value on a control chart that indicates the limit of variation acceptable for a process in statistical quality control.

Compressive Strength

The capacity of a material or structure to withstand loads tending to reduce size, typically measured in pounds per square inch or megapascals.

Injection Molding

A manufacturing process for producing parts by injecting material into a mold, commonly used with plastics but also other materials.