MATH

posted by .

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 -

    C = 2πr

    Mutliply that value by 7 and convert to Km/hour

    6,318,138.7m = 6,318.1387Km

    3600 seconds = 1 hour

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    can you walk me through this problem At what distance from the Earth will a spacecraft on the way to the Moon esperience zero net force due to these two bodies because the EArth and Mon pull with equal and opposite forces?
  2. chemistry

    Radio waves travel at the speed of light which is 3.00 x 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 x 108 km from Earth?
  3. Physics

    At the heighest point on earth, the distance to the center of the earth is approximately equal to 1.0014 times the radius of the earth. What would be in N/kg the magnitude of the gravitational field (g) due to the earth at that position?
  4. Astronomy

    Suppose that you travel to a planet that has 4 times the Earth's mass and 4 times the Earth's radius. Calculate how much more or less you would weigh on this planet compared to your weight on Earth. Express your answer as a factor …
  5. astronomy

    6. Suppose that you travel to a planet that has 4 times the Earth’s mass and 4 times the Earth’s radius. Calculate how much more or less you would weigh on this planet compared to your weight on Earth. Express your answer as a …
  6. science

    A space probe of the surface of Mars sends a radio signal back to the Earth, a distance of 3 x 1010 km. Radio waves travel at the speed of light (3.00 x 108 m/s). How far away is the space probe?
  7. physics

    Earthquakes are motions of the earth's crust. Essentially, they are big sound waves that travel through the earth. There are two types of waves. The first type is called a longitudinal or P wave, where the earth compresses in the same …
  8. Science

    A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth
  9. Science

    A space probe on the surface of Mars sends a radio signal back to earth a distance of 8.66x0^7 km. Radio waves travel at the speed of light (3:00x10^8 m/s . How many seconds does it take the signal to reach earth
  10. Math

    an object’s weight on a planet is directly proportional to the mass of that planet and inversely proportional to the square of the radius of the planet. jupiter is 318 times as massive as Earth and has a radius 11 times as large …

More Similar Questions