1. Calculate the forc e required to take away a flat circular plate of radius 0.01m from the surface of the water. The surface tension of water is 0.075 N/m.

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v