For a radio signal to travel 150 km from the transmitter to a receiving antenna, it takes
A. 5 x 10-4 second
B. 4.5 x 10-3 second
C. 5 x 10-8 second
D. 4.5 x 10-6 second
Answer:A
For a radio signal to travel 150 km from the transmitter to a receiving antenna, it takes
A. 5 x 10-4 second B. 4.5 x 10-3 second C. 5 x 10-8 second D. 4.5 x 10-6 second