1. A celebrity holds a press conference, which is televised live. A television viewer hears the sound picked up by a microphone directly in front of the celebrity. This viewer is seated 2.6 m from the television set. A reporter at the press conference is located 3.7 m from the microphone and hears the words directly at the very same instant that the television viewer hears them. Using a value of 343 m/s for the speed of sound, determine the maximum distance between the television viewer and the celebrity. (answer in meters)
2. A communications satellite is in an orbit that is 3.2 x 10^7 m directly above the equator. Consider the moment when the satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 3.2 x 10^6 m. Find the time it takes for a telephone call to go by the way of satellite between these cities. Ignore the curvature of the earth. (answer in seconds)
The following posting helps find the maximum distance between the television viewer and the celebrity. It also shows how to find the time it takes for a telephone call to go by the way of satellite between these cities.