# Quantum mechanics minimum uncertainty

URGENT!! quantum mechanics question

## Homework Statement

In the lungs there are tiny sacs of air, which are called alveoli. The average diameter of one of these sacs is 0.25nm. Consider an oxygen molecule(mass=5.3x10^-26kg) trapped with a sac. What is the minimum uncertainty in the velocity of this oxygen molecule?

## Homework Equations

I'm not sure what equation I should use...then I'll post what the possible answer is

## The Attempt at a Solution

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LHC
I'm reading a similar section in my physics textbook, and I came across an equation ... in the section for Heisenberg's uncertainty principle.

$$\Delta x \Delta p \geq \frac{h}{2\pi}$$, where h is Planck's constant.

Hope that helps?

Hey LHC, thanks for the quick reply :)

I know that nm=r and kg=m but how would I sub it into the equation you mentioned?

x--> uncertainty in particle's position...
p--> uncertainty in particle's momentum...

Redbelly98
Staff Emeritus