Determine the compressive force (in lb) in the bars shown after a temperature rise of 173°F if d = 0.015 in. Round off the final answer to five decimal places. Use the following data: Bronze              Aluminum A = 2.24 sq. in          A = 2.78 sq. in  E = 14959726 psi            E = 10594540 psi L = 12.5 in            L = 16.6 in α = 11.61 x 10-6/ °F      α = 12.67 x 10-6/°F

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Temperature Difference and Heat Transfer

Whenever there is a flow of heat flux resulting from a temperature gradient within the material or between two materials, there is heat transfer. Heat transfer primarily arises due to temperature differences between two bodies or within bodies. The term temperature gradient denotes temperature differences or variation of temperature due to change in some quantity. The fundamental use of the concept of temperature is found in the zeroth law of thermodynamics.