When NASA was communicating with astronauts on the moon,the time from sending on the Earth to receiving on the moon was 1.28 s.Find the distance from Earth to the moon.(The speed of radio waves is 3.00 × 10⁸ m/s. ) A) 240 000 km B) 384 000 km C) 480 000 km D) 768 000 km

Question

Quizplus · Accepted Answer

We can use the formula:

distance = speed x time

where speed is the speed of radio waves and time is the time it takes for the signal to travel from Earth to the moon and back. Since the signal only travels one way in the time given, we need to multiply the time by 2.

distance = speed x time x 2
distance = (3.00 x 10^8 m/s) x (1.28 s x 2)
distance = 7.68 x 10^8 m

Converting this to kilometers, we get:

distance = 7.68 x 10^8 m ÷ 1000 = 7.68 x 10^5 km

This is closest to answer B, which is 384,000 km.

When NASA Was Communicating with Astronauts on the Moon,the Time