A bowling ball of mass 8.00 kg is rolled down a bowling alley lane at 5.00 plus/minus 5.0 m*s^-1. What is the minimum uncertainty in its position?
What is the delta V for this problem? I keep rereading the question, and it seems to be 10 m/s. However, when I use this value, I get the wrong answer. The textbook key solves the problem using delta V=5 m/s. Why is delta V 5 and not 10?
Textbook Problem 1B27
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 170
- Joined: Wed Sep 30, 2020 9:58 pm
- Been upvoted: 12 times
Re: Textbook Problem 1B27
I think this is an error in the solution guide. If you check on the website, there is a link called "Solution Manual Errors".
Last edited by Crystal Yu 1D on Mon Oct 19, 2020 2:24 pm, edited 1 time in total.
-
- Posts: 108
- Joined: Wed Sep 30, 2020 9:39 pm
- Been upvoted: 3 times
Re: Textbook Problem 1B27
Delta v should be 10 m/s. I believe this is an error in the book's solution. Here's a full list of errors in the solution manual:
https://lavelle.chem.ucla.edu/wp-conten ... rs_7Ed.pdf
https://lavelle.chem.ucla.edu/wp-conten ... rs_7Ed.pdf
-
- Posts: 112
- Joined: Wed Sep 30, 2020 9:54 pm
- Been upvoted: 1 time
Re: Textbook Problem 1B27
Hi!
Whenever we are given "+ -" the delta x is always 2 times the number after "+-". I believe there is a mistake in the solution and here is the link to all the mistakes that professor Lavelle found.
https://lavelle.chem.ucla.edu/wp-conten ... rs_7Ed.pdf
Hope it helps!
Whenever we are given "+ -" the delta x is always 2 times the number after "+-". I believe there is a mistake in the solution and here is the link to all the mistakes that professor Lavelle found.
https://lavelle.chem.ucla.edu/wp-conten ... rs_7Ed.pdf
Hope it helps!
-
- Posts: 69
- Joined: Wed Sep 30, 2020 10:03 pm
Re: Textbook Problem 1B27
I was going to ask the same thing too. Thank you for pointing out the mistake, I thought I was misunderstanding what the "change in velocity" was and as a result, was quite confused.
-
- Posts: 104
- Joined: Wed Sep 30, 2020 10:09 pm
Re: Textbook Problem 1B27
I was also confused on this problem, but the +/- symbol in front of the value 5.0 m/s should be multiplied by 2 to give deltaV the value of 10 m/s.
-
- Posts: 101
- Joined: Wed Sep 30, 2020 9:55 pm
Re: Textbook Problem 1B27
You use 10 m/s for the uncertainty because if the velocity is +/- 5 m/s then the values for velocity can vary by 10 m/s so that is the value you use in your calculation
Return to “Heisenberg Indeterminacy (Uncertainty) Equation”
Who is online
Users browsing this forum: No registered users and 4 guests