Define rigidity modulus. 1. The new length L 2 of a bar of length L 1 , of coefficient of linear expansion α, when subjected to a temperature rise T is: L 2 = ...... 2. The thermal strain ε due to a...

Define rigidity modulus.

1. The new length L₂
of a bar of length L₁, of coefficient of linear expansion α,

when subjected to a temperature rise T is: L₂
= ......

2. The thermal strain ε due to a temperature rise T in material of coefficient of linear ex-

pansion α is given by: ε = ......