Asolid cylinder of mass 12.0 kg and radius 0.250 m is free to rotate without friction around its central axis. if you do 75.0 j of work on the cylinder to increase its angular speed, what will be its final angular speed if the cylinder starts from rest?

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.