Recent content by yasemonkey

Oh I have to square root k x r^2 !

hmm... okay and I'm right in saying k= 9 x 10^9

Homework Statement An oil drop is charged negatively. How much charge is on the drop if the Electric Field is 6,400 N/C at a distance of 1.2 m? Homework Equations E=k q/r^2 I don't know if I should be using that equation for this one. The Attempt at a Solution I tried to do E/(k x r^2) = q...