Textbook Problem 1B.25

[Fiona Choi 1K]

I'm really confused on how the particle in a box would apply to this problem. Can someone walk me through this problem?

[Jenna 1G]

Hi!
To solve this problem, you need to use the uncertainty principle. delta p * delta x >= h/4pi
the position is given (350 pm) (delta x). you have to convert pm to m (3.5 x 10^-10) and then solve the equation. because it is asking for the speed, you need to use the equation, delta p= delta v * mass of electron. rearrange this equation to solve for v and that is your answer!

[Mrinalini Mishra 2L]

The particle in a box basically refers to that given value being equal to delta(x). That's how I interpreted it and I ended up getting the correct answer, using the Heisenberg Indeterminacy Principle (just input the other number available to you there)! Hope this helps.