## 1.6b

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

JasonNovik3A
Posts: 21
Joined: Fri Sep 29, 2017 7:07 am

### 1.6b

Calculate the wavelength of a rifl e bullet of mass 5.0 g traveling at twice the speed of sound (the speed of sound is 331 m\$s#1).

Can someone explain how to do this problem?

William Lan 2l
Posts: 73
Joined: Fri Sep 29, 2017 7:07 am

### Re: 1.6b

use the equation (lambda = h/p)......h is Planck's constant (6.626 x 10^-34) and p is momentum (mass x velocity). So with the given mass of the bullet and the velocity, calculate the momentum. Then do Planck's constant/momentum and you will get wavelength.

I hope this helps

Rana YT 2L
Posts: 49
Joined: Thu Jul 27, 2017 3:01 am

### Re: 1.6b

make sure that when you're calculating it using the bohr relationship that you convert the values into kilograms and m/s before you calculate the wavelength.