Posted by **Anonymous** on Wednesday, September 15, 2010 at 8:07pm.

Is there a shorter way to answer this question?

Radio waves ina vacuum travel a distance equal to seven times the circumference of earth in 1 s. If the radius of Earth is 6 318 138.7m, what is the speed of the radio waves in kilometres per hour?

- MATH -
**PsyDAG**, Thursday, September 16, 2010 at 1:32pm
C = 2πr

Mutliply that value by 7 and convert to Km/hour

6,318,138.7m = 6,318.1387Km

3600 seconds = 1 hour

## Answer This Question

## Related Questions

- Science - A space probe on the surface of Mars sends a radio signal back to ...
- Science - A space probe on the surface of Mars sends a radio signal back to ...
- Physics - At the heighest point on earth, the distance to the center of the ...
- physics - Earthquakes are motions of the earth's crust. Essentially, they are ...
- science - A space probe of the surface of Mars sends a radio signal back to the ...
- physics - can you walk me through this problem At what distance from teh Earth ...
- astronomy - 6. Suppose that you travel to a planet that has 4 times the Earth’s ...
- Astronomy - Suppose that you travel to a planet that has 4 times the Earth's ...
- chemistry - Radio waves travel at the speed of light which is 3.00 x 108 m/s. ...
- physics - The mean distance of the planet Neptune from the Sun is 30.05 times ...

More Related Questions