Answer to Question #264622 in Physics for jay

Question

Q5. A single bar of material Q of the same cross-sectional area is to be used to allow the same

rate of flow of heat through it as the composite series arrangement when the same temperature

difference exists between its ends. What should be the length of the bar if this rate of flow is

107 W?

A) 0.75 m

B) 0.65 m

C) 1.25 m

D) 1.50 m

Answer 1

There are four factors (k, A, ΔT, d) that affect the rate at which heat is conducted through a material. These four factors are included in the equation $q=\frac{Q}{t}=k\frac{\Delta T}{d}A$ that was deduced from and is confirmed by experiments.

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