Question

Approximately how long would it take for a telephone signal to travel 2800 mi? (Telephone signals travel at about the speed of light? Answer in s

Answer 1

We know that the speed of light is approximately 186282 mi/s, so:

`\begin{gathered} t\approx(2800mi\ast1s)/(186282mi)\Rightarrow t\approx(1400)/(93141)s \\ \\ \Rightarrow t\approx0.02s \end{gathered}`

So, it would take approximately 0.02 s.