For a wall of a given material and of a fixed surface area, the rate of heat loss by conduction through the wall is inversely proportional to the thickness (T) of the wall, and directly proportional to the temperature difference (d) across the wall. The rate of heat loss could be given by which of the following expressions?

A. 2d/T

B. 2 T/d

C. 2d + ½ T

D. 2 (d + ½ T)

E. T/d

Question

Mathematics

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2 November, 13:12

For a wall of a given material and of a fixed surface area, the rate of heat loss by conduction through the wall is inversely proportional to the thickness (T) of the wall, and directly proportional to the temperature difference (d) across the wall. The rate of heat loss could be given by which of the following expressions?

A. 2d/T

B. 2 T/d

C. 2d + ½ T

D. 2 (d + ½ T)

E. T/d

+1

Answers (1)

Know the Answer?

Rowan Perkins · Answer 1

The answer is A. 2d/T

Since d is directly proportional to the heat lost it should be the numerator

since T is inversely proportional to the heat lost it shoudl be the denormirator

that is 1/T; 2 is the constant

the actual formula is R = kd/T