The time for a radar signal to travel to the Capital and back, a one-way distance of about 3.8 *10⁸ m, is: A) 1.3 s B) 2.5 s C) 8 s D) 8 min E) 1 *10⁶ s

Question

Quizplus · Accepted Answer

The time for a radar signal to travel to the Capital and back is twice the time for the signal to travel one-way (since it has to travel the same distance twice).

Using the formula: time = distance / speed of light

We can find the time it takes for the signal to travel one-way: 
time = 3.8 × 10^10 / 3 × 10^8 = 126.67 seconds

And the time for the signal to travel there and back: 
time = 2 × 126.67 = 253.34 seconds ≈ 2.5 s

Therefore, the answer is B.

The Time for a Radar Signal to Travel to the Capital