# Christoffer

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Orlando, FL

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1. ## Help with question, with the use of Newton's version of Kepler's third law

Thank you all so much for good response. I belive I got it! Based on what I found, combined mass should be 1.47*10^22 kg. M1+M2=(4π^2*19700000^3)/((6.67*10^-11)*552960^2)=1.47994*10^22 Christoffer
2. ## Help with question, with the use of Newton's version of Kepler's third law

I have all the data I need to calculate this. The problem is after countless times of trying, I just can't get the equation to work. After googling the question, I found several ways to find the answer, but for the lack of explanation I don't know how they got the answer. Or if its any difference with trying to find the mass when you only know the semimajor axis. Simply, I just need somone to guide me, maybe give me a headstart on how the right equation is.
3. ## Help with question, with the use of Newton's version of Kepler's third law

Yes, its an assignment
4. ## Help with question, with the use of Newton's version of Kepler's third law

Hi I don't know if this the right forum for this, but here it goes. With use of Newton's version of Kepler's third law i have to calculate the question below. Pluto's moon Charon orbits Pluto every 6.4 days with a semimajor axis of 19 700 kilometers. Calculate the combined mass of Pluto and Charon. Some kind soul that have the ability to help me?
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