ISL TL = 499.9666667 --20)382) A horizontal distance of (500 m) must be lay out with a steel tape, length of the steel tape olunder standard conditions is (30 m). Field conditions indicate that standard conditions apply except the measured temperature is 50 °C and applied tension 120'N, Determine the correct -b)L E --50)3 The standard temperature20 °C. *21* Coefficient of thermal expansion of steel tape = 11.6x10-6 °C Po Standard tension = 50N 35 الله ميشه له horizontal distance to be laid out, if W L Mass of the tape = 0.05 kg/m P² 5)Modulus of elasticity (E) = 210*106 N/m2 120) Cross-sectional area of the tape = 0.02 cm² 1.05 +X5 +1.15 = 28 X5= 3-3- X5 = 1.1 1.1-2.4 = -1.3 5675-1.3= 55.4 -

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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.