Explain the properties of different materials with using 4 Line charts ( Aluminium, notched aluminium, Brass and Copper ) and how they act under a tensile load. also, to explain why a ‘notched’ test sample may have a different result. Second 2- (Brinell hardness test) with using one Line chart for Aluminium d=3.9mm F=14.7kN D=10mm Steel d=3.7 F=20kN D=10mm Nylon d=5.1mm F=4.9KN D=10mm