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Is atomic absorption spectrometry (AAS) destructive or non-destructive?

I have to determine the speed of a motor using PE=mgh and KE= ½mv^2. The motor is being used to lift a 20g mass 25cm into the air. Im not really sure how to do this, but this is how I did it: PE = 0.02 x 9.8 x 0.25 = 0.049 J KE = PE Therefore KE = 0.049 J 0.049 = ½ x 0.02 x v^2...

Hi, I need help on the following questions in my maths assignment: 1) The elevation to the top of a high rise building at a place X due west of it is 78º and at a place Y due south of X the elevation is 58º. If the distance from X to Y is 200 metres find the height of the building.<O:p...

Hi, i need som help solving the following equation: "(x<SUP>2</SUP>-4)/(x-1) is greater than 0" Do I multiply the x-1 across to make (x<SUP>2</SUP>-4) greater than x-1 ?? I tried this and made the quadratic equation x<SUP>2</SUP>-x-3 greater than 0 but I cant factorise this. What am i doing...

Im doing a prac: "Beetroot: a natural indicator" and need to know "at what pH range does beetroot indicator change colour?". Thanks.