College Physics Problem 1.33

Approximately how many atoms thick is a cell membrane, assuming all atoms there average about twice the size of a hydrogen atom?

SOLUTION:

The cell membrane is 10^{-8} m while the hydrogen atom is 10^{-10} m. The number of atoms in the cell membrane is

frac{d_{m}}{2d_{H}}=frac{10^{-8}}{2times10^{-10}}=50 atoms

 

Advertisements