What is the magnitude of the centripetal force that must be applied in order for a
0.5 kg ball on a 2.0 m string to spin with
uniform circular motion at 5.0 m/s?

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

The energy equivalent of the rest mass of an electron is

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.