Alveoli are tiny sacs of air in the lungs. Their average diameter is 4.50 Γ— 10βˆ’5 m. Calculate the uncertainty in the velocity of an oxygen molecule (5.30 Γ— 10βˆ’26 kg) trapped within a sac. Enter your answer in scientific notation.

Respuesta :

Answer: The uncertainty in the velocity of oxygen molecule is [tex]4.424\times 10^{-5}m/s[/tex]

Explanation:

The diameter of the molecule will be equal to the uncertainty in position.

The equation representing Heisenberg's uncertainty principle follows:

[tex]\Delta x.\Delta p=\frac{h}{2\pi}[/tex]

where,

[tex]\Delta x[/tex] = uncertainty in position = d = [tex]4.50\times 10^{-5}m[/tex]

[tex]\Delta p[/tex] = uncertainty in momentum Β = [tex]m\Delta v[/tex]

m = mass of oxygen molecule = [tex]5.30\times 10^{-26}kg[/tex]

h = Planck's constant = [tex]6.627\times 10^{-34}kgm^2/s^2[/tex]

Putting values in above equation, we get:

[tex]4.50\times 10^{-5}m\times 5.30\times 10^{-26}kg\times \Delta v=\frac{6.627\times 10^{-34}kgm^2/s}{2\times 3.14}\\\\\Delta v=\frac{6.627\times 10^{-34}kgm^2/s^2}{2\times 3.14\times 4.50\times 10^{-5}m\times 5.30\times 10^{-26}kg}=4.424\times 10^{-5}m/s[/tex]

Hence, the uncertainty in the velocity of oxygen molecule is [tex]4.424\times 10^{-5}m/s[/tex]