Momentum


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

Momentum

Postby Elyssa Smith 4B » Tue Oct 15, 2019 11:42 am

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

Postby A Raab 1K » Tue Oct 15, 2019 12:41 pm

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

Postby Maia_Jackson_2C » Wed Oct 16, 2019 8:15 pm

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

Postby Leila_4G » Thu Oct 17, 2019 10:39 am

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

Postby 005391550 » Thu Oct 17, 2019 10:47 am

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
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Re: Momentum

Postby Veronica_Lubera_2A » Thu Oct 17, 2019 10:51 am

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

Postby Shrayes Raman » Fri Oct 18, 2019 12:06 am

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

Postby Megan_1F » Fri Oct 18, 2019 11:27 am

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


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