JD3E8

perhaps you could measure the force (magnetic field) of your electromagnet using ampere's law: http://en.wikipedia.org/wiki/Ampere%27s_Law#Integral_form then devise a way to measure the force of attraction of your electromagnet when placed near the magnet u want to measure the strength of (maybe hook a vertical scale to one end of your electromagnet, hinged opposite to the end creating the magnetic field.) then find the difference between the force of attraction when the magnets are near each other and the theoretical force created by the electromagnet when it is not interacting.

its the properties of the cloth that give the ruler a charge when it is rubbed. im not sure if the cloth charges it negatively or positively (depending on the details of the experiment) but either way, opposite charges attract; if the ruler is positively charged by the cloth (it is stripped of electrons) or negatively charged (given an excess of electrons) then it will attract a neutral piece of paper (like a magnet attracted to a neutral refrigerator door). this is possible because negative charges can move freely in most materials. if a positively charged rod is placed near a neutral object, the negative charges in the neutral object will be repelled from the positive rod, and in turn the positive charge built up on the other side will be attracted to the rod. (and the same goes for the opposite orientation of charges). if the tissue paper was charged then there could be an even stronger attraction if the charges are still opposite. if the charges were equal (both negatively charged) then the bits of paper would be repelled by the ruler.

i think iv figured it out (thanks to a couple youtube videos) the first orbital n=1 has no subshells, so 2 electrons fill the s shell. as for other orbitals the first two electrons fill the 1s subshell then start filling the s subshell of the n=2 orbital.

Recently in my physics class we have been discussing the relationship between quantum numbers and the electron orbitals of the atom. After trying all day to understand this concept, Id like to post my misconception to the SNF community; Here is my confusion: Electrons arrange themselves in orbitals and sub orbitals, and in the lowest orbital (s), they can be arranged (as in the first few elements): H: 1s^1 (one electron in the 1s subshell) He: 1s^2 (two electrons in the 1s subshell) Li: 1s^2 2s^1 (two electrons in the 1s subshell and one in 2s) this is where i cant seem to understand; how is it that there are now 3 electrons (and many more as the order continues, going to 3s and 4s) in the first orbital, when only 2 are supposed to be allowed [#of electrons = 2(2l+1)]?

the other day i was watching something about drugs on tv. in the programs discussion of marijuana they displayed an image of the THC molecule. upon noticing how (relatively) large the molecule is, i started thinking on a quantum mechanical level; if the THC molecule is so large, then it would take a large amount of energy to ionize or break down. i concluded that this large energy requirement is why it needs to be burnt to create a reaction. this makes sense to me, but my knowledge of chemistry is limited, and this was a rather awkward question to be asking my professors.. can anyone tell me how accurate this conclusion is?