Question

The tension in a copper wire 1m long and 10^−3cm^2 is increased quasi statically and isothermally at 20 C from 10 to 100N. How much work is done if the isothermal Young’s Modulus is at 20oC is 1.23 × 10^11 N/m^2 ?

Answer 1

Answer:

let for 1m^2 increase the Force be 1.2×10^4

and for 100 N the increase is 7.5