It looks like you're new here. If you want to get involved, click one of these buttons!
Speaking of "magnetic ropes", here is an experiment I have devised and performed recently with a drum made of two thin cardboard discs pierced by a number of ordinary sewing needles. The drum is hanging freely on a thread in perfect static equilibrium, i.e. it is neither spinning nor swinging around. Then a magnet is brought under the drum while holding the drum by hands in order to prevent it from swinging towards the magnet. With the release of the drum it starts spinning, which is rather surprising. Observe that spinning is taking place with acceleration!Check it out: A "Drum" of Ferromagnetic Needles Rotating In Magnetic Field (click here)Read more: A Sound Magnetic Base - The Atom Discussions on Magnetic Current Research
I'm surprised no one has followed up to Barau's comment quoted below. This is absolutely fascinating and I have some questions regarding the set up. But first, am I missing something here? This is profound and yet has received no attention. What was the inspiration for the design of this demonstration? What is the configuration of the pins? The magnet assembly is also curious. It seems to be a delrin disk sandwiched between two sets of ring neo magnets. Why? Looking forward to your response. Thanks.
Dear Prof. Johnson,I have recently come across your homepage on the Internet. Your views on the second law of thermodynamics, on the mechanism of drag and lift, and on the sorry state of the orthodox physics in general resonate quite strongly with me. One of the major problems of physics and physics education today is its overmathematisation, i.e. reliance on unphysical mathematical models, and belief in the magical powers and intelligence of mathematical formulas and equations. It is ridiculous to expect more intelligence from an equation than one puts into it.We all have learned how to write "smart" equations on the blackboard, but very few are willing to put their hands on the plow and do real things with their own hands. What's more, it seems that the majority of scientists have no genuine curiosity left that is a requisite for doing real scientific research. To substantiate my assertion let me give you one simple example. Take a look at the experiment with a set of needles rotating in a magnetic field which I have devised and performed recently:http://magneticuniverse.com/discussion/comment/1515#Comment_1515I have presented this experiment to a number of physicists and mathematicians, but not only none of them was able to explain it - they have not even shown the slightest curiosity and desire to figure out what is going on there.I googled "Claes Johnson, Edwin Jaynes", but the search returned nothing that would indicate that you are familiar with the work of Edwin Jaynes, in particular with his magnum opus "Probability Theory: The Logic of Science". Please take a look at the unpublished paper of Jaynes mentioned here:http://magneticuniverse.com/discussion/comment/1512#Comment_1512It appears that you are one of the few who can fully appreciate and benefit from what Edwin Jaynes had to say about the nature of the so-called second law of thermodynamics. Best regards,Arthur Baraov
y first conclusion was that something was really wrong with the electromagnetic theory of Maxwell according to which a ferromagnetic pin placed in a magnetic field – no matter how thin it is, or how strong the magnetic field might be – should not spin.Read more: A Sound Magnetic Base - The Atom Discussions on Magnetic Current Research
It is counter intuitive that the thread would wind itself up counter to its twisting torque.