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Pliny

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About Pliny

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  1. I'll be off line for awhile but I'll be back to take up your latest post in a few weeks, kimmy. Talk to you later. Have a glorious day!
  2. We're getting to the end of this pretty soon. Here's a situation for you. We have two masses, M1 and M2. M1 is a mass equal to M2. The difference between the two is that M2 has magnetic propertiesWe put M1 or M2 on a rotor and use some energy to get the rotor rotating that takes X amount of energy, because the two masses are equal the energy necessary to turn the rotor should be equal. Now we place a coil with an iron core next to M1 as it rotates and nothing happens. We place the same coil with an iron core next to M2 and we get an electric current generated in the coil. The question
  3. Well, when you say that "putting current through a wire with zero resistance creates almost zero energy and generates almost no heat at all" I have to wonder if you have my interests in mind at all? It looks like the kids have chimed in and they seem well up on things. I guess they aren't as stupid as you believe.
  4. That small amount of energy that aligns the electrons should mean a reduction in a difference of potential, that is the magnetic force, but it doesn't the same force exists as existed prior to the alignment. Gravity is a force, that is a difference of potential and thus, against the theory of relativity, is a source of energy that never depletes. Magnetism is a similar force that is a source of energy that essentially never depletes. The absence of dark matter may mean the unraveling of relativity theory. It is not for my benefit that you go through this exercise. Of that I am certain. A d
  5. It does sound like it. Of course it is, the energy is necessary or else no magnetic field is generated at all. However, the energy is necessary and is converted to electron aligning to produce magnetism and that is converted to align electrons in a ferrous material such as a spring. Energy is never consumed. Unless Einstein was wrong? I think there are a few Physics teachers that teach energy can be consumed, perhaps yours did? Power companies use the term consumed as in how much you converted to different forms. When one turns on a light one says he is consuming energy. In actual fact h
  6. It does indeed take energy to move the electrons and bend the spring and hold it with an electromagnet but doesn't appear to need to move any electrons with a permanent magnet in order to bend the spring and hold it.
  7. No one knows why a permanent magnet exists in nature. The properties of magnetism are indeed well understood. It wasn't so easy to prove the world was round a millenium ago. Evidence had to be gathered to prove it. Traveling around the world took too long and was fraught with too many dangers. The idea of a flat Earth ended for most of us around the end of the 1400's.
  8. That's all correct Peter. Here's the point. No one knows why a magnet exists in nature. We can make a magnet by running electrical current through a coil around an iron core. The magnetism exists as long as the current is going through the coil. The electro-magnet pulls on the spring. Work is being done. As long as current is going through the coil the spring is being bent. A permanent magnet pulls on the spring in the same manner but no energy is being expended. It is similar to me not having to eat to stay alive. Having some kind of permanent unknown source of energy to keep myself e
  9. I don't think so. Magnetism is a molecular force that changes the molecular alignment of particles only in a ferrous material - at least that's the theory. Spaghetti acts the same no matter what material you throw it at. If spaghetti sticks to the wall by the exact same electromagnetic interactions that magnets do then magnets would stick to the wall as well.There is no explanation for why magnetism exists. Spaghetti sticking to the wall, glue, a block sitting on a table are all gravitational phenomena and not electro-magnetic phenomena.What kind of scientist are you? All right. I know how
  10. There is no need to uproot the present because someone is rooted in the past. We need to move on. No one in present civilization has directly experienced injustices of a century ago and they never will. Are there still injustices? Of course, but hopefully we have made progress. Is it the right of those descendants of those who experienced past injustices to inflict injustices on the descendants of the past oppressors of earlier generations?
  11. You are just being obtuse. Cooked Spaghetti sticks to the wall because it is sticky. There are normal and gravitic forces and mass properties that explain that phenomena. There is no actual reason that explains why magnets exist. There is an understanding of them from different views, the Newtonian view and the quantum physics view are both different. Read about that here. http://sunearthday.gsfc.nasa.gov/2010/TTT/71.php Now grade ten physics is not going to explain magnetism except as kimmy has explained it here. For practical purposes it is explained in our grade 10 physics. Cer
  12. I will try and make it really simple for you and the kids.A magnet in proximity to a metal spring will attract the spring to it. This is how a contact works in an electrical circuit. The proximity of the magnet bends the spring and there is a contact closure. As long as the magnet remains in the proximity of the contact the spring contacts remain closed. The metal of the spring tries to return to its normal position but as long as the magnet is in proximity to it the spring is held in place. Of course it takes energy to move the spring and close the contacts. Like an elastic there is always a
  13. Normal force is holding up the mass of the magnet? Is that what you are saying? "A magnet under the beam has no normal force exerted upon it to hold it up." Is what I said. There is no extant upward normal force applied to the mass of the magnet. Excellent that you find definitions important. Just above didn't you answer normal force was holding the magnet up?The normal force (downward) in your equation is only a reaction to the normal force of the mass of the magnet applied upward by the attraction of oppositely charged molecuales created by the magnetic force so they essentially balance. If
  14. Thanks squid. So in the non-scientific context the big bang theory is something unproven or speculative. As used in science, it is an explanation or model that helps to explain and predict natural phenomena. It doesn't exclude the possibility of other theories and as long as there are unknowns it remains a theory. There are currently two "theories" that are of practical or scientific use in physics, they are Newton's gravitational theory and the theory of relativity. Non-scientifically speaking then they are speculative. Scientifically they are models or concepts that explain and predict n
  15. The kids? I know so you can love them and hold them and pet them. The theory of relativity is accepted as fact by a lot of people and that is the problem. You were asking for what anomalies there were in the theory earlier and there are quite a few. The search for dark matter is essentially to explain one of those anomalies, where all the mass is that the theory says should be there. The Higgs-Bosun particle should exist according to theory. Physicists at CERN believe they may have discovered one last summer, more testing is being done. Quantum mechanics, string theory, dark matter all the
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