how to calculate the potential difference necessary tobe maintained between two horizontal condunting plate 5.00mm apart so that a small oil drop of mars 1.31×10^-13kg with two electrons attached to it remain in equilibium between them, which plate will be at the positive potential​

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

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.)

Acar travels 40m in 8 seconds find the car speed