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Challenge Question! A human hair is approximately 22.059 micrometers in diameter. Express this diameter in inches. Remember, 2.54 cm = 1 inch. Note, your answer may be decimal (e.g. 0.03 m) or in scientific notation (e.g. 3.0E-2; note that "E-2" means ten raised to the -2 power).

 
Guest Sep 12, 2018
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Using dimensional analysis

 

22.059 micrometers  x 1 cm / 10000 micrometers x 1 in / 2.54 cm

 

[ cancel the units and we have ]

 

[22.059 / [ 10000 * 2.54] in  = 0.0008684 in   =  8.684 x 10-4 in

 

 

 

cool cool cool

 
CPhill  Sep 12, 2018

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