The temperature of a bar is reduced by 50°C. If the recorded elongation is -0.5 mm and the coefficient of thermal expansion is 11.7x10-6/°C, the initial length of the bar is nearest to (A) 855 mm (B 800 mm C) 750 mm D) 700 mm

The temperature of a bar is reduced by 50°C. If the recorded elongation is -0.5 mm and the coefficient of thermal expansion is 11.7x10-6/°C, the initial length of the bar is nearest to (A) 855 mm (B 800 mm C) 750 mm D) 700 mm

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter4: Temperature Effects On Atom Arrangements And Atom Motion

Section: Chapter Questions

Problem 4.5P

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Concept explainers

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.

Question

The temperature of a bar is reduced by 50°C. If the recorded elongation is -0.5 mm and the coefficient of thermal expansion is 11.7x10-6/°C, the initial
length of the bar is nearest to
(A 855 mm
(B) 800 mm
750 mm
D) 700 mm

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