A Brass Plate with a Thickness of 1 $^{\circ}$ C and of Copper Is 400 W/m

question 60

Multiple Choice

A brass plate with a thickness of 1.00 cm is placed over a copper plate with a thickness of 2.00 cm.The coefficient of thermal conductivity of brass is 100 W/m $^{\circ}$ C and of copper is 400 W/m $^{\circ}$ C.What is the effective coefficient of thermal conductivity for the brass-copper layer?

• A) 150 W/m\(^{\circ}\)C
• B) 200 W/m\(^{\circ}\)C
• C) 250 W/m\(^{\circ}\)C
• D) 300 W/m\(^{\circ}\)C
• E) 350 W/m\(^{\circ}\)C

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Definitions:

Inflation

A widespread rise in prices and a decrease in the value of money.

Spending Multiplier

A concept in Keynesian economics that quantifies the effect of an increase in autonomous spending on the total economic output.

Potential Output

The highest level of economic output that can be sustained over the long term without increasing inflation.

MPC

Marginal Propensity to Consume, which indicates the fraction of additional income that a household is likely to spend on consumption.