## Quiz 1 uncertainty question

$\Delta p \Delta x\geq \frac{h}{4\pi }$

Dahriel Aron 3A
Posts: 60
Joined: Fri Sep 25, 2015 3:00 am

### Quiz 1 uncertainty question

"An electron is moving at v=3.78x10^5 m/s. A neutron is moving at the same velocity. Which particle is the position known with the greatest precision and why"
For this question would it be the electron since it has a smaller mass? Or would it be a neutron because that has a greater mass?

Fariha Hameed 1D
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

### Re: Quiz 1 uncertainty question

It would be the electron because the neutron would have a greater delta p (which is equal to mass times velocity.) Since certainty in momentum and certainty in position are inversely related, the greater the certainty in momentum, the lower the certainty in position. Hope that answered your question!