Since propagation delay can only be measured in terms of time, we are to determine the time from the given distance and speed. In physics and through dimensional analysis, their relationship is written as:
Speed = Distance/Time
Time = Distance/Speed
Time = 500 miles/(186,000 miles/s)
Time = 2.688×10⁻³ seconds or 2.688 milliseconds
Thus, the propagation delay is 2.688 ms.
