Calculate Period of Planet X with Kepler's Third Law

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Homework Help Overview

The discussion revolves around calculating the orbital period of a hypothetical planet X using Kepler's Third Law, particularly in relation to its orbital radius compared to Earth's radius.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to identify the correct formula for the period of planet X based on its orbital radius. Participants question the specifics of Kepler's Third Law and express uncertainty about its definition.

Discussion Status

The discussion is currently focused on clarifying the principles of Kepler's Third Law, with participants seeking foundational knowledge rather than progressing towards a solution. There is an acknowledgment of the need for more information regarding the law itself.

Contextual Notes

Participants note a lack of access to the relevant formula in their textbook, which contributes to their confusion and the need for clarification on Kepler's Third Law.

meemosewa
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Using Kepler's Third Law, give the formula for the period TX of planet X whose orbital radius RX is twice that of earth, RE.

A. TX=(1 Year)x(RX/RE)^3
B. TX^2=(1 Year)x(RX/RE)^3
C. TX=(1 Year)x(RE/RX)^3
D. TX^2=(1 Year)x(RE/RX)^3

My book is not giving me a formula to use, so i a totally stuck... and ideas?
 
Physics news on Phys.org
What does Kepler's third law say?
 
thats part of the problem, i don't know what it says
 

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