## Velocity +/- Values

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

Jonathan Pai 2I
Posts: 121
Joined: Fri Sep 28, 2018 12:27 am

### Velocity +/- Values

A homework problem gave us the velocity which was 5+/-5, so the delta v was 10. What if the velocity is 57+/-4, is delta v 8, 53, or 61? Is it just the +/-(uncertainty) that is the delta v value?

Ibrahim Malik 1H
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 1 time

### Re: Velocity +/- Values

From what I can tell, the delta-v value would be 61. In your first example, delta-v, or change in velocity, is a total of 10 because the velocity ranges from -5 to +5. So going from -4 to +57, there would be a delta-v of 61.

Emmanuel Ogunrinde 3L
Posts: 14
Joined: Fri Sep 28, 2018 12:24 am

### Re: Velocity +/- Values

Yeah the uncertainty would always be the range between the two values. But I think they would always gives us even ranges like -1/+1, -3/+3, or -12/+12, and not uneven ranges like -12/+2, -3/+4, or -9/+4.

Sean Reyes 1J
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

### Re: Velocity +/- Values

Delta v just implies the range of values that velocity could take on.
So if you are given +57/-4, then the values that velocity could take on ranges between those 61 values of velocity.