Alveoli are tiny sacs in the lungs whose average diameter is 5×10−5m. Consider an oxygen molecule (5.3×10−26kg) trapped within a sac. Calculate uncertainty in the velocity of oxygen molecule.
Uncertainty in position Δx= Diameter of Alveoli
=5×10−10m
ΔxΔv≥h4πm
Δv≥6.626×10−344×3.14×5.3×10−26×5×10−10
Δv≈1.99m/sec.