The coefficient of thermal expansion varies as ∂=2/T units. Find increment in length when temperature increases from 300K to 600K??

Hello Student
Given
Coefficient of thermal expansion , a = 2/T
let the there be increase in temperature dt
increse in the length dl = adt
increase in the length l = Integeration (adt) = 2lnT
= 2ln(600/300)
=2ln2
=1.3872 m
Regards,
IHE