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Topic: Science
Number of pages / Number of words: 6 / 1632
Essay's paper body

In this case, however, knowledge and experience would mislead the physicist: In fact, all materials can be lifted by using magnetic fields that are rather standard these days.

Whether an object will or will not levitate in a magnetic field B is defined by the balance between the magnetic force F = MB and gravity mg = V g is the material density, V is the volume and g = 9...


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The magnetic moment M = (/ µ0)VB so that F = (/

µ0)BVB = (/2µ0)VB2. Therefore, the vertical field gradient B2 required for levitation has to be larger than 2µ0 g/. Molecular susceptibilities are typically 10-5 for diamagnetics and 10-3 for paramagnetic materials and, since is most often a few g/

cm3, their magnetic levitation requires field gradients ~1000 and 10 T2/m, respectively...


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