Tierra is playing in her backyard when she hears her friend calling out to her. she can't see her friend but can hear her friend's voice. which wave phenomenon explain why tierra can hear her friend even when she can't see her?

Use the table to answer question 22 23 and 24.

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?