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If a planet takes 100 years to revolve around the sun, how long is their day? Is there...

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saugustin | Student, Grade 7 | eNoter

Posted April 10, 2013 at 8:12 PM via web

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If a planet takes 100 years to revolve around the sun, how long is their day? Is there information missing?

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted April 11, 2013 at 3:56 AM (Answer #2)

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The time taken by a planet to revolve around the Sun is how long a year on the planet is. In this case one year on the planet has the same duration as 100 Earth years. It is not possible to determine how long a day on the planet is given only the time it takes to revolve around the Sun as the two are not correlated. For example, a year on Venus is equal to 224.68 Earth days but a day on Venus is equal to 243 Earth days; on the other hand a year on Neptune is equal to 164.81 Earth years but a day is only 19.1 Earth hours.

It is not possible to determine how long a day on the planet is with the information provided.

The missing information is the time taken by the planet to rotate on its axis.

Sources:

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oldnick | Valedictorian

Posted April 11, 2013 at 3:48 AM (Answer #1)

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I think so, you'd know how this planet is great and find his angular speed.

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