Magnetism. A magnet being used to separate iron filings from fine sand. The iron filings,being a magnetic material,stick to the magnet while the sand,made of non-magnetic silica,doesn't | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4500 px × 4500 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |