What is the minimum uncertainty in the velocity of this oxygen molecule?

In the lungs there are tiny sacs of air, which are called alveoli. The average diameter of one of these sacs is 0.29 mm. Consider an oxygen molecule (mass = 5.3 x 10^-26 kg) trapped within the sac.

1 Answer
Jan 21, 2018

This question is ill-stated for the desired units.

Explanation:

The relative size of the alveoli and oxygen mass have nothing to do with the velocity of a molecule. "Uncertainty" is a description of the relative accuracy known in a calculation. It depends only on the relative accuracy of the data measurements and their relationships (combinations) with each other. "Minimum uncertainty" is expressed normally in the number of significant digits used for a final answer.