## Momentum

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

Elyssa Smith 4B
Posts: 58
Joined: Wed Sep 18, 2019 12:22 am

### Momentum

I'm not familiar with momentum. In the Heisenberg equation will we ever have to solve for momentum or will it be given?

A Raab 1K
Posts: 56
Joined: Sat Aug 24, 2019 12:16 am

### Re: Momentum

Momentum is the mass of an object times velocity, or p = m * v. So yes, we might have to solve for momentum for Heisenberg's equation.

Maia_Jackson_2C
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

### Re: Momentum

Momentum is also important because some small objects may not have a measurable mass, but they have momentum, so we can still use the equation for them because of momentum.

Leila_4G
Posts: 114
Joined: Sat Sep 14, 2019 12:17 am

### Re: Momentum

I still don't understand why delta v is equal to the +/- number attached to the velocity when the velocity is given. It seems like it should be twice the value of the number that is +/-, but my TA told be explicitly that it is not.

005391550
Posts: 103
Joined: Thu Jul 25, 2019 12:15 am

### Re: Momentum

we only want the possible variance of the velocity. it does seem like it should be twice the number to cover the range but it's just suppose to be the +/- value, not sure why

Veronica_Lubera_2A
Posts: 106
Joined: Sat Sep 14, 2019 12:16 am
Been upvoted: 1 time

### Re: Momentum

Delta V is the uncertainty of its position. So for example, if in the given we have 10 m/s +- 1m/s, the delta V would be 1. It's 1 and not 2 because a particle can't go in two directions at once.

Shrayes Raman
Posts: 129
Joined: Sat Jul 20, 2019 12:15 am

### Re: Momentum

Moment or p (not actually p but looks like it!) is a product of mass and velocity. Its possible to encounter a question where this might be asked for. However, from what I have seen the velocity part is more important. That's also what leads to momentum uncertainty.

Megan_1F
Posts: 49
Joined: Thu Jul 25, 2019 12:16 am

### Re: Momentum

We most likely will have to calculate momentum to solve for position or wavelength.