Problem

(Heat transfer) The following formula is used to determine the heat transferred through a...

(Heat transfer) The following formula is used to determine the heat transferred through a flat substance, such as a wall, with its two sides maintained at different temperatures:

q is the heat transfer.

k is the thermal conductivity of the substance in watts/m°C.

T2 is the higher temperature on one side of the substance in °C.

T1 is the lower temperature on the other side of the wall in °C.

d is the thickness of the substance in meters.

a. Determine the units of q by calculating the units resulting from the right side of the formula.


b. For a glass window with a thickness of 0.5 centimeters, a thermal conductivity of 0.77 watts/ m°C, and outside and inside temperatures of 36.6°C and 22.2°C, determine the value of q.


c. If you were asked to write a computer program to determine the heat transfer through a substance, what inputs, outputs, and algorithm would your program require?

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