Question

A celebrity holds a press conference, which is televised

Answer 1

Answer:

The maximum distanced between the television viewer and celebrity is:

3586 km

Explanation:

First, we are going to calculate the time it takes sound to travel from the celebrity to the reporter:

How the sound's speed is 343 m/s, then:

x = vt and  $t = \frac{x}{v}$

  Where: x: the distance traveled by the sound

               v: the sound's speed

               t : time    

then

t = 4.1/343 = 0.011953 seconds

This time is the same that the electromagnetic signal takes to travel from the celebrity to the television viewer. Considering that the electromagnetic signal travels to the light's speed and it is:

$V_{l} = 300000 km/s$

The maximum distanced between the television viewer and celebrity is:

x = vt

x = (300000km/s)(0.011953s ) = 3586 km