The density of gold is 19.3 g/cm^3 . A 6. 4 mg piece of gold is hammered into a square that is 8.6x10^-6 cm thick.( a.) Calculate the thickness of gold in um (micrometers) (b) What is the length of a side of the square, in cm?

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.