Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
equations/formulas help?
Ok, I have more than one question here. I tried googling these but there weren't any helpful results.
My first question: What is the equation/formula to find the orbital period of something, using ONLY its speed??
My second question: What is the formula for finding the semi-major axis of something using ONLY its speed??
my third question: What is he formula for finding the eccentricity of an orbit using ONLY the orbital period?
I appreciate all your answers, thank you.
2 Answers
- ronwizfrLv 71 decade agoFavorite Answer
None of these exist. Here is why.
Orbits are ellipses. The shape of the ellips is defined by the semi-major axis A and the eccentricity E.
All orbits with the same A will have the same orbital period P, but the total length of the orbit will be a (rather convoluted) function of A and E.
Conclusion: the average speed depends on three parameters A, E, and P, not one.
