Question

what do you mean by coefficient of linear expansion of Al is 22.9*10 ^-6 /°c?​

Answer 1

Coefficient of Linear expansion:

• It is defined as the change in the unit length of the body per unit change or variation or increase in the temperature of the body.
• In order to know how much a metal expands on heating, this co-efficient is very much required.

• For an aluminium metal, the coefficient of linear expansion is given as $22.9*10^{-6} / °C$.
• This means, for every one degree increase in the temperature, the aluminium metal changes its length by $22.9*10^{-6}$ units

Answer 2

It is defined as the change in the unit length of the body per unit change or variation or increase in the temperature of the body.

In order to know how much a metal expands on heating, this co-efficient is very much required.

For an aluminium metal, the coefficient of linear expansion is given as 22.9*10^{-6} / °C22.9∗10−6/°C .

This means, for every one degree increase in the temperature, the aluminium metal changes its length by 22.9*10^{-6}22.9∗10−6 units