50.2 MB (925.4 KB compressed)
5132 x 3417 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 nickel and copper for magnetism. Nickel is magnetic while copper is not.
Model release not required. Property release not required.