A magnet is an object that produces a magnetic field, which can attract or repel certain materials, primarily ferromagnetic substances like iron, nickel, and cobalt. Magnets have two poles, north and south, where the magnetic force is strongest. They can be permanent, retaining their magnetism over time, or temporary, exhibiting magnetism only when influenced by an external magnetic field. Magnets are widely used in various applications, including electric motors, generators, and magnetic storage devices.
It's a good book
You can remagnetize a magnet by rubbing a good magnet along the bad one. Do this a few times. Be sure to rub the magnet in only one direction.
a summary is most of the time good and a critique can be good or bad depending on the paper.
not a summary.
no, not really, any summary will give an inaccurate and misleading picture. A good example of this is the summary given on answers.com.
Neither or both.
brain drain conclution
Heat does not hold a straight pin to a magnet; rather, it can affect the magnet's properties. When heated, certain magnets can lose their magnetism due to a phenomenon called thermal demagnetization. However, if the pin is made of ferromagnetic material, it can be magnetized and attracted to the magnet when at a lower temperature. In summary, heat itself does not hold the pin to the magnet; it's the magnetic properties of the materials involved that determine the attraction.
No
You are probably talking about an electro magnet. For detailed explanations and some good drawings see the link on electromagnets here:
Do not introduce new information in a summary.
a good boy is one that you do not get into trouble