# When NASA was communicating with astronauts on the moon, the time from sending radio signal on the earth to receiving on the moon was 1.28s.Find the distance from earth to the moon. (the speed of...

When NASA was communicating with astronauts on the moon, the time from sending radio signal on the earth to receiving on the moon was 1.28s.

Find the distance from earth to the moon. (the speed of radio waves is 3.00 x 10 to the 8th power m/s)

kjcdb8er | Teacher | (Level 1) Associate Educator

Posted on

The formula for distance is speed x time.

So d = 3.00 x 10^8 m/s x 1.28 s

d = 3.84 x 10^8 m/s, or 384 x 10^6 m/s

So the distance to the moon is 384 million meters.

krishna-agrawala | College Teacher | (Level 3) Valedictorian

Posted on

The time taken for the radio signal to travel from Earth to Moon is 1.28 second.

The speed of radio wave is 3.00*10^8 m/second The distance between earth and Moon is = (Time taken)*(Speed of radio wave) = 1.28*(3.00*10^8) = 3.84*10^8 meters = (3.84*10^8)/1000 kilometers = 384,000 kilometers. Answer: Distance from earth to moon is 384,000 kilometers.