As in the case of unlike magnetic poles, unlike electric charges a. attract each other. b. repel each other. c. exist in pairs. d. do not interact. pls  

What happens when a rubber rod is rubbed with a piece of fur?

What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?

Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.