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How can you locate a small object in a large area filled with similar objects?

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How can you locate a small object in a large area filled with similar objects?
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Its a pretty careless thing to do losing a needle even near a haystack.. . Mythbusters did this last series ... they used a combination of high power magnets, water (to make hay float and needles sink), fire (to burn away hay), and plain luck.
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i would do three things,use a metal detector,magnett or find it the hard way
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why do you want to find it? just leave it there.
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By using a magnet, a metal detector or water. Dry hay floats. . . Even tougher though, how do you find a needle in a needle stack.
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With a fine tooth comb
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Burn it.. But don't cause any harm.
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With a magnet.
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with lots of luck...and maybe a metal detector
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Just go to the darn store and buy a different needle. Cheese and Rice!
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magnet
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