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17 March, 12:54

A human hair is about 50 um thick. A pet flea is about 1 mm in size. How

many times smaller is the thickness of a human hair than a flea?

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  1. 17 March, 13:13
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    Convert 50 um into mm

    50um *.001 mm=.05 mm

    .05/1=.05 times smaller
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