I found this so much harder than any past papers I'd done, realised I'd gone 4kw too high for the 'one cup' kettle question /: Didn't really leave myself enough time for the question on the polarising filters in 3d glasses, found it unusual to see that question on significant figures, but I guess it was an easy mark, overall though I don't feel happy with how I did /: Does anyone remember what they put for their estimate of strain on an elastic band? o: