Here are three stress v strain graphs shown on approximately the same scale. Stress B A С Strain a) Match each graph to one of either copper, glass or rubber. Give a reason for each of your choices, perhaps making reference to the grey circular points. b) Explain with the aid of a stress v strain graph why an elastic band becomes warm after stressing and being allowed to return to its original length. c Explain how the Young's modulus for rubber describes the shape of its graph. W