## Homework Problem 1B.27

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

Victoria Zheng--2F
Posts: 103
Joined: Fri Aug 09, 2019 12:17 am

### Homework Problem 1B.27

The question says that the bowling ball of mass 8.00kg is rolled down a bowling alley lane at 5.00+/- 5.0m/s. I don't know if the change in the velocity of the bowling ball is 10m/s or 5m/s?

AlyssaYeh_1B
Posts: 100
Joined: Sat Aug 17, 2019 12:16 am

### Re: Homework Problem 1B.27

When doing your calculation, the Δv you should use is 10m/s, which is your maximum uncertainty.

DesireBrown1J
Posts: 98
Joined: Wed Sep 18, 2019 12:18 am

### Re: Homework Problem 1B.27

AlyssaYeh_1C wrote:When doing your calculation, the Δv you should use is 10m/s, which is your maximum uncertainty.

Why do we have to use the maximum uncertainty velocity in the Heisenberg Indeterminacy equation?

Jocelyn Thorp 1A
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

### Re: Homework Problem 1B.27

DesireBrown3K wrote:
AlyssaYeh_1C wrote:When doing your calculation, the Δv you should use is 10m/s, which is your maximum uncertainty.

Why do we have to use the maximum uncertainty velocity in the Heisenberg Indeterminacy equation?

because the maximum uncertainty is the entire range that you are uncertain. when you say plus or minus five, there could be a difference of 10 between 10 values contained within that, thus your maximum uncertainty would be 10 (to account for being wrong by 5 in either direction).

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

### Re: Homework Problem 1B.27

The question says plus or minus 5 which gives a maximum indeterminacy of 10. Use 10 in your calculation.

Anne Tsai 1F
Posts: 50
Joined: Thu Jul 25, 2019 12:15 am

### Re: Homework Problem 1B.27

But the problem asks for the minimum indeterminancy, so why don't you use 5 m/s in your calculation?

Emil Velasco 1H
Posts: 96
Joined: Wed Nov 21, 2018 12:19 am

### Re: Homework Problem 1B.27

We use 10 for delta V