## Midterm 2019 Question 3A

$\lambda=\frac{h}{p}$

SarahSteffen_LEC4
Posts: 67
Joined: Sat Aug 24, 2019 12:17 am

### Midterm 2019 Question 3A

I am unsure why the solutions manual to the midterm is using (9.109 X 10^-34 kg) when using the De Broglie Equation instead of using (9.109 X 10^-31 kg), which is what we've been using on homework problems for questions like these?

205296774
Posts: 66
Joined: Thu Jul 25, 2019 12:15 am

### Re: Midterm 2019 Question 3A

I think that the solutions manual has an error. Our constants and equation sheet says 9.109 X 10^-31 kg and I used this value on my exam and received full credit.

JinwooLee_1F
Posts: 47
Joined: Sat Aug 17, 2019 12:15 am

### Re: Midterm 2019 Question 3A

The solution manual is wrong, I used 9.109383 * 10^-31 and got 7.3 nm, which is the correct answer.