A piece of brass of mass 170kg has its temperature raised from 0oC to 30oC….

A piece of brass of mass 170kg has its temperature raised from 0oC to 30oC. Calculate its increase in volume, given the density of brass at 0oC as 8.5 x 103kgm3 and its cubic expansivity as 5.7 x 10-1k1
  • A.
    3.4 x 10-5m3
  • B.
    4.3 x 10-5m3
  • C.
    3.4 x 10-5m3
  • D.
    3.4 x 10-3m3
  • E.
    3.4 x 10-2m3
Correct Answer: Option C
Explanation

V = (frac{m}{p}= frac{170}{8.5 x 10^{-3}}) = 0.02
= (Delta)(frac{delta V}{V delta T})
(delta V) = (Delta) x V x (delta)T
= 5.7 x 10-5 x 0,02 x 30
= 0 3.42 x 10-5

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