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In all parts of this problem, assume the planet is located at its mean distance from...

In all parts of this problem, assume the planet is located at its mean distance from the Sun as shown in Chapter 5 of the textbook. (These same distances can be found at http://theanswermachine.tripod.com/id2.html.)

How long would it take a message sent as radio waves from Earth to reach the following?

(a) Mars when it is nearest to Earth
  minutes
(b) Pluto when farthest from the Earth
  minutes

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Answer #1

When nearest - 33.9 million miles - 3.03 minutes.
at the farthest- 294.16 million miles - 26.35 minutes.
Both have elliptical orbits, hence the great difference in the distance.

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