Please Solve Question No.9
9. Research and find out the thickness of hair and radius of an atom .Then convert it into exponential form.

 

Dear Student,
the thickness of human hair is of the order of microns and is expressed in micrometers. The radius of an atom is of the order of few angstroms 
1$\mu m={10}^{-6}m$
$1\stackrel{0}{A} ={10}^{-10}m$