Question

2) A circular hole of
radius 1cm is drilled
in a brass sheet at 20°c.It the sheet
is heated to 120°C what will be the diameter
of the hole
(alpha for brass=18x10^-6 0C^-1)
​

Answer 1

Answer:

diameter= 0.12 cm

Explanation:

A2 = A1 * 2 alpha * change in temp

by substituting all values we get radius = 0.06cm and hence diameter = 2r = 0.12 cm