Calculate the change in length on a copper (coefficient of linear expansion for copper is 17 * 10-6 / oc) rod that is 25 meters that undergoes a temperature change of 15 o.

0.6375 cm

Explanation:

coefficient of linear expansion of copper, α =

Lo = 25 m

Δ T = 25 degree C

According to the formula of thermal expansion which is linear in nature is given by

Where, ΔL be the change in length

=0.6375 cm

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach