Recent content by marc873a

Oh, so he just found the ratio between attraction between the lead balls and the attraction between the earth and another object? But I'm still pretty confused on he calculated that attraction. I know of F = GMm/r^2, but that can't be it because G wasn't invented, right? What other formula...

Well, using the formulas I have seen so far, the density is calculated using the mass of the earth or G, and G is estimated using the density or mass of the earth. I have not yet found any formulas where the result is found without using the other values which is what confuses me

You sure? As you probably saw, a lot of sources says he didn't: https://en.wikipedia.org/wiki/Cavendish_experiment https://www.physicsclassroom.com/class/circles/Lesson-3/Cavendish-and-the-Value-of-G https://www.britannica.com/science/Cavendish-experiment I have found a few articles that...

I'm trying to find how Cavendish got the density of the earth to 5,48 times the density of water. In all of the YouTube videos and webpages I have seen, they mention different formulas where the mass of the earth or the gravitational constant, G, is included. But as far as I understand, these...

Thank you very much :)

Okay so the distance from earth to sgr a* is 26670 ly or about 2.523 * 10^20 m away. According to the wiki site I linked, the star, S2, has a semi-major axis of 0.1251 arcsec. What would the distance from S2 to sgr a* be?

Okay, thanks. How do I convert that into a distance unit like AU or m?

I'm trying to calculate a few different things about sgr a* using the stars that orbit it. I have found this table which includes all the stars that orbit: https://en.wikipedia.org/wiki/Sagittarius_A*_cluster My problem is, that the semi-major axis is measured in arcsec, and I need it in AU or...