That woman was influencer Kristina Provenzano, who went viral on TikTok for warning viewers of the potential risks of the Internet-popular "cat eye" manicure — a nail style that requires the use of ...

the magnetic moments of atoms align in a certain direction. This is how an iron nail sticks to a magnet, for example. There are also substances that are antiferromagnetic. This is rare ...

The iron core increases the coil’s magnetic field strength. A simple electromagnet is made by coiling wire around an iron nail. An iron core makes a temporary electromagnet. It loses its ...