A metal of volume 40 cm\(^3\) is heated from 30 °c to 90 °c, the increase in volume is
[Linear expansivity of the metal = 2.0 x 10\(^{-5}\)K\(^{-1}\)]
A copper wire was subjected to a tensile stress of 7.7 x 10\(^7\). Calculate the strain of the wire.
[Young modules = 1.1 x 10\(^11\) Nm\(^{-2}\)]
