Radio waves travel at the speed of light,which is 3.00 × 10⁸ m/s.How many kilometers will radio messages to outer space travel in exactly one year? (365.24 days = 1 y)

Question

Quizplus · Accepted Answer

To find out how far radio messages will travel in one year, we need to multiply the speed of light by the number of seconds in a year. First, we need to convert the number of days in a year to seconds:

365.24 days/year × 24 hours/day × 60 minutes/hour × 60 seconds/minute = 31,557,600 seconds/year

Now we can multiply the speed of light by the number of seconds in a year:

3.00 × 10^8 m/s × 31,557,600 s/year = 9.46 × 10^15 m/year

Finally, we can convert meters to kilometers by dividing by 1000:

9.46 × 10^15 m/year ÷ 1000 m/km = 9.47 × 10^12 km/year

Therefore, the correct choice is D: 9.47 × 10^12 km.

Radio Waves Travel at the Speed of Light,which Is 3