A permanent magnet is always magnetic. It has an invisible magnetic field. Only certain materials, such as iron, feel a magnetic force. Permanent magnets can come in lots of different shapes and ...

This product, with function of removing iron powder, micro iron powder, magnetic substance and other magnetism contamination ... by simply open the machine . l These magnetic rods can be turned inside ...

This anomaly affects Earth's magnetic field, which may pose risks to satellites and the International Space Station. The SAA is caused by molten iron in Earth's core. NASA is monitoring and ...