Question

A rectangular block is heated from 0⁰C to 100⁰C. The percentage increase in its length is 0.10%. What will be the percentage increase in its volume ?

• A. (a) 0.03 %
• A. (b) 0.10 %
• A. (c) 0.30 %
• A. (d) None

Answer 1

(c)

a = 10^–5/ŗC $\frac{\Delta\mathcal{l}}{\mathcal{l}}$ = 0.10%, DT = 100ŗC

\ $\frac{\Delta\mathcal{l}}{\mathcal{l}}$ = a Dq and $\frac{\Delta V}{V}$ = g. Dq = 3a.Dq