based on dimly remembered physics lessons and arcane scrolls of knowledge...
1 Tesla euqals about 400 kPa pressure (says wikipedia). Assume the bed is about 1x2 meters and weighs, including a person lying on it, 100 kg. (Yeah, ok so that person is a bit on the thin side, but for a first estimate it should be ok.)
In earth's gravity 100kg amounts to 980 newton. So that's 980 N/m-2, which is 980Pa.
400.000 / 980 =~ 408. So that makes it 1/408 = 0.00245 Tesla (2.45 millitelsa) to keep the bed and Kate Moss afloat :)
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Tars, hoping to pass the knowledge(physics) roll. |
