Repel a grape tied on thread.
A grape is repelled by
the north and south poles of a strong rare-earth magnet. The grape is
because it contains water, which is diamagnetic. Diamagnetic materials are repelled by magnetic poles.
One large grape or watermelon cube
One piece of 18" thread
Tie grape or watermelon cube with one end of thread
Bring one pole of the magnet near the grape. Do not touch the grape with the magnet.
The grape will be repelled by the magnet and begin to move slowly away from the magnet.
Pull the magnet away and let the grape stop its motion.
Turn the magnet over
bring the other pole near the grape. The grape will also be repelled by
other pole; the grape is repelled by both poles of the magnet.
Types of Magnetics:
Ferromagnetic materials like iron are strongly attracted to both poles of a magnet.
Paramagnetic materials like aluminum are weakly attracted to both poles of a magnet.
differ and are repelled by both poles of a magnet. The diamagnetic
epulsion is very weak (a hundred thousand times weaker than the ferromagnetic force of attraction). Water
is 93% of grape or watermelon cube thus diamagnetic water. All diamagnetics are not the same and we
are talking about nature Water Resources and new D cells.
When an electric charge moves, a magnetic field is created. The motion of an orbital electron is an
electric current, with an accompanying magnetic field. Because electrons carry charge and they spin,
every electron is a very tiny magnet.
Iron, cobalt, and nickel atom electrons align with electrons in neighboring atoms to make very strong
magnetization regions called domains. These ferromagnetic materials are strongly attracted to magnetic poles.
Hydrogen, lithium, and
oxygen atoms and molecules have single, unpaired electrons are
These electrons orient in a magnetic field are weakly attracted to magnetic poles.
Helium, bismuth, and
atoms and molecules have electrons paired with electrons of opposite
and the orbital currents are zero for these diamagnetic.
Lenz's Law of
If a magnet is brought toward a diamagnetic material, diamagnetic atoms and molecules generate orbital
electric currents. The magnetic fields associated with these orbital currents will orient so that diamagnetics
substance will be repelled by the approaching magnet.
Lenz's Law of physics
this behavior. This law states that when a current is induced by a
magnetic field (the orbital currents in the grape created by the magnet approaching the grape), the magnetic
field produced by the induced current will oppose the change.
Alternative Fruits to
Try fruits other than grapes, watermelon or canalope; a fruit
which has a high water content, works well. Cut the fruit into
Hang a small object
a long thread. Bring an NIB magnet near it. If the material is
object will be very slightly repelled.
If the object is
the object will be very slightly attracted. NIB is neodynium-iron-boron.