Question

define coefficient of linear expansion write its S.I.unit

Answer 1

A coefficient of thermal expansion… is the ratio of the fractional change in size of a material to its change in temperature. is represented by the symbol α (alpha) for solids and β (beta) for liquids. uses the SI unit inverse kelvin (K−1 or 1/K) or the equivalent acceptable.

Answer 2

THE NUMBER WITH THE VARIABLE LIKE 4x, 10a, etc