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Do You Know
Questions & Answers on General Knowledge.

What is a magnetic field?
The area around a permanent magnet has a force that can affect other magnets or magnetic materials that come near it. This area is called a magnetic field. Even the Earth has a magnetic field. It is like a huge bar magnet. Even if you cut a huge bar magnet into tiny pieces, each piece is still a magnet with its own small magnetic field.
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    A good night s sleep

    While we sleep, organs, bones and tissue repair, and emotions and memories shift from an active to a storage part of the brain, essential for long-term memory. Insomnia is a common concern in later life, especially for women. What keeps us awake? Worry and health problems, according to a telephone survey of 1,000 Americans. And hot flashes.

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