An aluminum pipe has a length of 70 m at a temperature of 20°C. An adjacent steel pipe at the same temperature is 10 mm longer than the aluminum pipe. Assume that the coefficients of thermal expansion of aluminum and steel are α = 23 × 10-6/°C and α, = 12 × 10-6/°C, respectively. At what temperature (degrees Celsius) will the aluminum pipe be 25 mm longer than the steel pipe? [Select] [Select] 53.035 deg. Celsius 49.85 deg. Celsius 73.035 deg. Celsius 56.37 deg. Celsius

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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.