Q1: Define and give an example of a material that is: (a). ductile (b). plastic (c). elastic (d). brittle (e). tough. (10)
Q2: Brass, an alloy of copper and zinc, consists of 70% by volume of copper and 30% by volume of zinc. density of copper = $8.9 \times 10^3$ kg $m^{-3}$ density of zinc = $7.1 \times 10^3$ kg $m^{-3}$
(i) Determine the mass of copper and the mass of zinc required to make a rod of brass of volume $0.80 \times 10^{-3}$ $m^3$. (6)
(ii) Calculate the density of brass.