Two Objects Are Placed in a Room with a Temperature

question 64

Multiple Choice

Two objects are placed in a room with a temperature of 20°C. Object A has a temperature of 70°C, while object B has a temperature of 140°C. They have the same emissivity, but different areas. What should the ratio of the area of object A to that of object B be if the net power emitted by both objects is the same?

• A) 2.0
• B) 3.4
• C) 5.2
• D) 17
• E) 21

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Definitions:

Job Turnover

The rate at which employees leave a workforce and are replaced by new employees.

Nominal Wage

The amount of money received by a worker per unit of time (hour, day, etc.); money wage.

Real Wage

The amount of goods and services a worker can purchase with his or her nominal wage; the purchasing power of the nominal wage.

Agency Shops

A workplace agreement where employees, whether or not they are union members, must pay union fees for the bargaining services the union provides.