MESSAGE
| DATE | 2013-04-03 |
| FROM | Ruben Safir
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| SUBJECT | Subject: [NYLXS - HANGOUT] Magic Medal
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http://news.discovery.com/tech/gear-and-gadgets/magnet-levitates-melts-metal-130403.htm
Cool levitation and heating effects can be done at home — if you
happen to have a little specialized electrical equipment and a few
tools.
This video shows a piece of metal floating in a coil and then melting.
How does this happen? It isn’t magic, just physics.
First the levitation. If you run an alternating current (like the one
from the outlets in your house) through coils you generate a magnetic
field that changes with time. House current would make it change 60
times per second. (That’s the “60 Hz” you see printed on the
power adaptors and appliances when it says what kind of power source you
can hook them up to). So the field in that case will oscillate at 60
hertz.
etc ...
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