Help with my physics homework please

  • Thread starter madman555
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  • #1
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Homework Statement


How long would it take a radio wave whose frequency is 7.25 x 10^5 Hz to travel from mars to Earth if the distance between the two planets is approximately 8.00 x 10^7 km.


Homework Equations



Don't know what to put here.

The Attempt at a Solution


7.25 x 10^5 / 8.00 10^9=9.0625 x 10^-5
Is that they right answer or am i doing this whole thing the wrong way?
 

Answers and Replies

  • #2
berkeman
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Homework Statement


How long would it take a radio wave whose frequency is 7.25 x 10^5 Hz to travel from mars to Earth if the distance between the two planets is approximately 8.00 x 10^7 km.


Homework Equations



Don't know what to put here.

The Attempt at a Solution


7.25 x 10^5 / 8.00 10^9=9.0625 x 10^-5
Is that they right answer or am i doing this whole thing the wrong way?

Hint: The frequency of the radio wave is irrelevant in this question. What is the velocity of propagation of light (and hence radio waves) in a vacuum?
 

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