Cavendish's torsion-bar experiment HD

[AndrewwwRoan]

mmm , no muy mal , quien alla echo este video muy mal

para imajenes crei que mejor busco en una pagina diferente

[Mrjellykid]

tomorrow is my physics paper

[PerfectBlindness]

how do you know it's not some other effect? like magnetisim?

[qed100]

Excellent question. The masses are chosen for their chemical compositions. They should be as dense as possible (to allow their centers of mass to approach as closely as possible) while also electrically & magnetically inert. The best overall material that's commonly available is lead. It's very dense, it doesn't tend to accumulate static electric charge, and is magnetically unresponsive.

[PerfectBlindness]

Thankyou, It's interesting because if you swapped the weights on the ends of the torsion balance for strong magnets of equal weight, you'd expect the same result.

[lhkjmvnb]

Actually, you would expect a much stronger force. G is to the power of -11.

[johnbunsenburner]

@qed100 I would say that gold would be the "best overall material" considering its density and how inert it is ect. However there are other limitations that make it a less attractive choice compared to lead. Also one must consider the composition of the rest of the apparatus, not just the weight to allow for a truely fair test.

[qed100]

@johnbunsenburner

Yes, I see your point. It's even more dense than Uranium.

[gibbo1112]

@johnbunsenburner it is a very good conductor, not good

[SheerPandemonium]

@PerfectBlindness use nonmagnetic materials....