[Adric] was pretty sure that the Quelab hackerspace laser wasn’t powerful enough to cut or etch a nickel-plated neodymium magnet. However, they suspected it would have just enough power to heat ...

5p and 10p coins made after January 2012 are magnetic. This is because 5p and 10p coins used to be made out of cupro-nickel, but this was changed to nickel-plated steel. Steel contains iron ...