Looking at the bottom standing wave in the picture, how many complete waves are present?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Difference between series and parallel circuits