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distance between the television viewer and the celebrity

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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)

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Solution Summary

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.

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