Question

A radio station broadcasts at 80 MHz. How long does it take for this radio signal to travel a distance of 2 x 10^7 m through space? (c = 3.0 × 10^8 m/s)

a. 0.15 × 10^-2 s

b.15 ms

c. 6.7 × 10^-2 s

d. 20 ms

e. 25 ms

Answer 1

S = C t where S is the distance traveled at speed C

t = S / C = 2.0E7 m / 3.0E8 m/s = .067 sec

(c) is correct