- #1
Trista
- 32
- 0
I have been working on a problem and can't seem to figure out what I'm doing wrong. Here goes:
An alpha particle (charge = +2.0e) is sent at high speed toward a gold nucleus (charge = +79e). What is the electrical force acting on the alpha particle when it is 2.0 X 10^-14 m from the gold nucleus?
I figured it would be an easy plug and chug, like this:
F=k (|e|^2 / r^2) which when I looked at it I found I'm confused. the problem said that the charge = +2.0e. Does that mean I multiply 2 * 1.6X10^-19? Then, there are 2 charges. In order to get the correct 'e' do I add them together and multiply by 1.6x10^-19? I understand they are both positive, and so they repel from each other, but the alpha particle is sent at high speed toward the gold nucleus.
I can tell I'm not going to enjoy this chapter...
thank you for your help!
An alpha particle (charge = +2.0e) is sent at high speed toward a gold nucleus (charge = +79e). What is the electrical force acting on the alpha particle when it is 2.0 X 10^-14 m from the gold nucleus?
I figured it would be an easy plug and chug, like this:
F=k (|e|^2 / r^2) which when I looked at it I found I'm confused. the problem said that the charge = +2.0e. Does that mean I multiply 2 * 1.6X10^-19? Then, there are 2 charges. In order to get the correct 'e' do I add them together and multiply by 1.6x10^-19? I understand they are both positive, and so they repel from each other, but the alpha particle is sent at high speed toward the gold nucleus.
I can tell I'm not going to enjoy this chapter...
thank you for your help!
Thanks. I must be brain fried. I must have tried this 10 times and it wouldn't come out. But after your post it worked just fine.