2 physics ?'s?
1. two charges are located along the x- axis. One has a charge of 6.4 C and the second has a charge of -3.2 C. If the electrical poetential energy associated with the pair of charges is -4.1*10 ^ -2 J, what is the distance between te charges?
2. A charge moves a distantance of 2.0 cm in the direction of a unifrom electric field having a magnitude of 215 N/C. The electrical potential energy of the charge decrease by 6.9 * 10 ^ -19 J as it move. Find the magnitude of the charge on the moving particle. (hint- the electrical potential energy depends on the distance moved in the direction of the field.
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assuming that you have the formulas for these, I won't type them out because they're kind of long. the answers are
1) 4.49 x 10^12 m. that's if you have the right charges down.
2) -1.6 x 10^-19 C, the same as an electron
i hope it helps! i took physics 2 this summer. i'll give you a link of the formula sheet for our final. it might help you with other things you're having problems with.
http://www.phys.lsu.edu/classes/summer2007/phys210...