Four charges are fixed at the corners of a square centered at the origin as follows: q at (−a, +a); 2 q at (+a, +a); −3 q at (+a, −a); and 6 q at (−a, −a). a fifth charge +q with mass m is placed at the origin and released from rest. find the speed when it is a great distance from the origin, where the potential energy of the fifth charge due to the four point charges is negligible.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.