An elastic rod with a cross-sectional area A = 2mm2 is stretched from an intial legth of 1.0m to a final legth of 1.1m at a constant tempreture of 15 degrees celcius . Calculate the heat exchanged between the elastic rod and its surroundings if it is made of a material with a isothermal Youngs modulus ET = 150GPa and a linear expansivity at constant tension af  = 15 x 10 -6 K-1.  a) 129.6675 J b) -129.6675 J  c) -6.75 J d) 6.75 J

Elements Of Electromagnetics
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An elastic rod with a cross-sectional area A = 2mm2 is stretched from an intial legth of 1.0m to a final legth of 1.1m at a constant tempreture of 15 degrees celcius . Calculate the heat exchanged between the elastic rod and its surroundings if it is made of a material with a isothermal Youngs modulus ET = 150GPa and a linear expansivity at constant tension a = 15 x 10 -6 K-1

a) 129.6675 J

b) -129.6675 J 

c) -6.75 J

d) 6.75 J 

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