By balancing apposite poles
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i think its when you are make a float and you put a soda in it in it foams a float
TWO!!! (float - ing)
Magnets are most commonly made out of metal, so yes, two metal magnets can repel. But metals such as iron are attracted to magnets even if the metal itself is not magnetized. Iron is attracted to both poles of a magnet, and it can not be repelled by a magnet.
Because it wouldn't make sense. Two intersecting lines of force - in this case, magnetic lines of force - would mean that at the point of the intersection, the force felt by a small test magnet would be in two different directions.
if the substance of the element has greater density you can make it float by carving it out so weight over volume of the object is lighter in effective density