## Help with #1.33 part C

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

Kyra LeRoy 1E
Posts: 52
Joined: Sat Jul 22, 2017 3:00 am

### Help with #1.33 part C

When you have
E(photon)=1.66x10^-17 +(1/2)mv^2
why do they plug in (3.6x10^6) as v in the solution manual, when the given value in the problem is 3.6x10^3?

Thanks!

Hannah Chew 2A
Posts: 76
Joined: Fri Sep 29, 2017 7:05 am
Been upvoted: 2 times

### Re: Help with #1.33 part C

3.6 x 10^3 is km/s but the SI unit should be meters and not kilometers. Therefore, you must convert km/s to m/s so that all the units cancel out in the final equation.