How Can You Calculate Jupiter's Radius Using Europa's Orbital Data?

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SUMMARY

The radius of Jupiter can be calculated using the orbital data of its moon Europa, which has an orbital period of 3.55 days and orbits at an average distance of 671,000 km. The gravitational acceleration at Jupiter's surface is 2.36 times that of Earth's, which is crucial for determining Jupiter's mass. By applying the formula for gravitational force and centripetal acceleration, one can derive Jupiter's radius from the known values of Europa's orbital characteristics and the gravitational acceleration ratio.

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  • Ability to perform calculations involving ratios and conversions
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Astronomers, astrophysicists, and students studying celestial mechanics or gravitational physics will benefit from this discussion.

brookbj
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The moon Europa, of the planet Jupiter, has an orbital period of 3.55 days and an average distance from the centre of the planet equal to 671,000 Km. If the magnitude of the gravitational acceleration at the surface of Jupiter is 2.36 times greater than that on the surface of the Earth, what is the radius of Jupiter? (hint: begin by calculating the rotation speed.

So I calculated the velocity and acceleration of the moon, but I am confused on how to calculate the radius without having the mass of Jupiter, is this where the 2.36 x g comes into play, do I use this to calculate the mass of Jupiter, which will then give me the radius.

thanks,
 
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Hint: What force produces the moon's acceleration?
 

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