A wire 12.0 m long and having a mass of 90 g is stretched under a tension of 240 N. A pulse is sent from the left end of the string, and 20 ms later another pulse is sent in the opposite direction from the right end of the string. How far from the left end of the string do the pulses first meet

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.