Match {alphaa, alphab, alphac, fbc, fab} to the correct gear system knowing gear a weighs 1 lb and has a radius of gyration of 1.3 in; gear b weighs 6 lb and has a radius of gyration of 3 in.; gear c weighs 9 lb and has a radius of gyration of 4.3 in. knowing a couple m of constant magnitude of 40 lb ⋅ in is applied to to the pictured gear, (ignore direction of the forces, choose the correct direction for alpha's - positive or negative):

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.