50.2 MB (930.7 KB compressed)
5145 x 3413 pixels
43.4 x 29.0 cm ⏐ 17.1 x 11.4 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
A horseshoe magnet is used to test iron and zinc for magnetism. Iron is magnetic while zinc is not.
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