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[edit] Inorganic Chemistry: Radial distribution functions of hydogenic orbitals
Question: Which orbital, 3p or 3d, gives an electron a greater probability of being found close to the nucleus? I know that the answer is 3p, but I don't know how I can explain this correctly. Can you help me with that?
Alchemist 09:19, 27 June 2007 (UTC)
- Question has been answered at the general Wikiversity Help Desk: [1]]. StuRat 04:55, 29 June 2007 (UTC)
[edit] Big bang
with out an external force,how can big bang occur? (The preceding unsigned comment was added by 59.91.251.154 (talk • contribs) 05:39, 18 May 2008.)
- You're quite correct that under traditional W:Newtonian physics, it would be impossible. However, this may not be true under W:quantum mechanics and newer variations, like W:string theory and W:brane theory. For a similar case, it would also seem to be impossible for matter to leave the area of a W:black hole inside the W:event horizon, yet it does, via W:Hawking radiation. StuRat 14:19, 18 May 2008 (UTC)
[edit] Increase the electrical conductivity of water
How do I increase the electrical conductivity of water while maintaining a non-corosive envirenment, or a minimal corosive envirenment?
--69.150.135.30 19:51, 18 June 2008 (UTC)
- Adding a bit of salt is the easiest way. You can add just about anything to pure water to increase it's electrical conductivity, though. For example, vinegar might work. I suggest you get an electrical meter, put the leads on either side of a beaker of water, then add a test substance to see how the electrical resistance changes. StuRat 01:20, 19 June 2008 (UTC)
[edit] Higgs field
how is the presence of the Higgs field as an everpresent uniform situation different from the ether that a michaelson trounced?
- As I understand it, W:Luminiferous aether was supposed to be a fluid which through light waves could travel, much like water is the fluid through which ocean waves travel. It turned out not to exist, and the wave/particle duality model of light was developed to explain how light could travel through a vacuum, instead. (W:Albert Michelson, in the famous w:Michelson–Morley experiment, attempted to prove it's existence, but ultimately proved it's non-existence.) The W:Higgs field, on the other hand, is a theory to explain how particles gain mass, much like particles can gain an electrical charge when passing through an electromagnetic field. StuRat 06:54, 7 August 2008 (UTC)
[edit] blue shift and big bang theory
If the universe is expanding because of the Hubble red shift, why are blue shifted galaxies heading in our direction?205.188.117.199 Larry Alan Hale
- Red shift means the object is moving away, and blue shift means it is moving towards us. So yes, since the universe is expanding, we would expect most galaxies to be moving away from us. However, the galaxies do have gravitational attraction for each other, so that those which are near each other tend to have gravitational effects which are more powerful than the overall expansion of the universe. Thus, some nearby galaxies are actually moving towards us. This doesn't necessarily mean a collision will result, as these galaxies can fall into orbits around each other. If you think about the Doppler Effect for sound, you can't tell from it when something is headed exactly toward you, such that it will hit you, but only whether it is generally headed toward or away from you. The red or blue shift would be stronger if it was headed exactly toward or away from you, but, since the speed is unknown, we don't have any basis for comparison of the amount of shift. StuRat 12:28, 29 August 2008 (UTC)
