Question 1
Radio waves travel at the speed of light, which is 3.00 × 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 × 108 km from Earth?
◦ 4.4 × 10
–2 min
◦ 1.6 × 10
5 min
◦ 4.0 × 10
15 min
◦ 44 min
◦ 2.6 min
Question 2
Radio waves travel at the speed of light, which is 3.00 × 108 m/s. How many kilometers will radio messages travel in exactly one year?
◦ 9.46 × 10
15 km
◦ 7.30 × 10
8 km
◦ 7.10 × 10
10 km
◦ 9.46 × 10
12 km
◦ 3.33 × 10
–3 km