Neil A. Armstrong was the first person to walk on the moon. The distance between the earth and the moon is 3.85 108 m. Find the time it took for his voice to reach the earth via radio waves.

1.283 seconds

Explanation:

Given,

Distance between the earth and the moon = 3.85 × 10^8 meters (m)

Speed of the radio waves in space = 3 × 10^8 meters/second (m/sec)

As we know that,

Speed =

Time =

Time =

Therefore, Time = 1.283 seconds.

Thus, the time it took for the voice of Neil Arm Strong to reach the earth via radio waves is 1.283 seconds.