The signs are actually manufactured from a vinyl material with a magnetic backing, which enables the signs to be lightweight and pliable. The signs are simply cut to size and shape, and vinyl ...

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 ...

you can make that section of the magnetic field attractive to the magnetic particles in the material, while a hill can be made by making it repellent. It’s quick too, responding to changes in ...

MIT physicists have created a new and long-lasting magnetic state in a material, using only light. In a study that will appear in Nature, the researchers report using a terahertz laser — a light ...