Description: A sealed glass tube filled with iron flings may be used to demonstrate magnetization of a ferromagnet. Shake the filings into the long thin section of the tube. Magnetize the filings by ...

This can be "seen" in two dimensions if iron filings are sprinkled ... efficient if the coil was wound around a metal core, as this helped to concentrate the magnetic field.

At this very moment, Trump and the oligarchs, kleptocrats, and grifters who have assembled around him like iron filings ...