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12 November, 11:56

There is an old story about a king and his crown. The king hired a goldsmith to make him a crown a pure gold. After the king received the crown, he started to worry that the goldsmith might have cheated him. He thought maybe the goldsmith didn't use pure gold, maybe he used a mix of metals to save money. The king asked a man named Archimedes to figure out if the crown was pure gold or not. Archimedes reasoned that the density of a lump of gold and a crown of pure gold would be the same. How could he prove if that crown was pure gold without melting or otherwise destroying the crown?

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  1. 12 November, 12:03
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    I've actually used the magnet test to determine if a gold necklace of mine was real or not. If the gold item aka the crown is attracted to a magnet, it is definitely not real gold. if it isn't then its real gold.
  2. 12 November, 12:21
    0
    If gold does not attract to a magnet, then it is real gold. If it does then it is not real gold. Because magnets attract materials that are made of iron, but if it doesn't attract it is real because it does not contain any iron or nickel.
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