Aring (2 kg, r = 2 m) rotates in a cw direction with initial angular velocity 10 s-1. a disk (8 kg, r = 2 m) rotates in a ccw direction with initial angular velocity 50 s-1. the ring and disk "collide" and eventually rotate together. assume that positive angular momentum and angular velocity values correspond to rotation in the ccw direction. what is the initial angular momentum li of the ring+disk system? what is the final angular velocity ωf of the ring+disk system?

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.

Amaterial that provides resistance to the flow of electric current is called a(an) (1 points)

Is the portion of the electromagnetic spectrum that has a frequency just above that of visible light.