Author's Suggestions for Measuring the Density of Pennies

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Homemade Micrometer

This lesson describes how to construct a simple and inexpensive micrometer that can be used to measure objects up to several centimeters thick. It has a readout accuracy of 0.1mm or better, with a potential precision of 0.01mm. Construction time is about 30 to 60 minutes...

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10-Feb-14 guy homemade micrometer