9. A 50 meter steel tape was standardized and supported throughout its whole length and found to be 0.0025m. Ionger at an observed temperature of 31.8°C and a pull of 10 kilos. The tape was used to measure a line which was found to be 662.702 m. at an average temperature of 24.6°C using the same pull. What is the correct length of the line? Use coefficient of expansion of 0.0000116 m. per centigrade. a) 662.67377m. b) 664.46566m. c) 669.34322m. d) 660.82883m.

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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.