## SAPLING homework #4(for me)

$E=hv$

Bailey Giovanoli 1L
Posts: 107
Joined: Wed Sep 30, 2020 9:50 pm

### SAPLING homework #4(for me)

On one of the problems on sapling you are given the question:

What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 7.34×10−7 J?

In the first Part of the problem, I had to solve for the threshold energy. I am expected to use that when carrying over into part b, right? If I didn’t, I don’t think there is enough information to solve the problem. I just wanted to clarify.

NayeliPlayas_1L
Posts: 130
Joined: Wed Sep 30, 2020 9:59 pm

### Re: SAPLING homework #4(for me)

For part B to get your maximum number of electrons you would divide your total energy by the work function which you got on part a. In other words, yes you would use part a to answer part b.

Ann Cosico 2H
Posts: 15
Joined: Wed Sep 30, 2020 10:01 pm

### Re: SAPLING homework #4(for me)

Yeah! You would use the amount you got for the work function for the second part of the question. This amount would be divided with the total energy in J to get the maximum number of electrons.

Bailey Giovanoli 1L
Posts: 107
Joined: Wed Sep 30, 2020 9:50 pm

### Re: SAPLING homework #4(for me)

Thank you! I’ve got it now!