Question

a metal sheet is of 4m x 3m size. what is the increase in its surface area when heated through 80 degrees Celsius? given that coefficient of superficial expansion of the metal is 2.4x10^-5/Celsius

Answer 1

Answer:

Increase in area = initial area x coefficient of area expansion x change in temperature

Here all the values are given except coefficient of area expansion

Coefficient of areal expansion=increase in area/(initial area × change in temperature)

Coefficient of areal expansion =1.2×1002.4×10−4

Putting the given values, we get coefficient of area expansion = 2 x 10−6

Now coefficient of volume expansion = 23 x coefficient of area expansion =3× 10−6

Video Explanation