KLB Physics Book 2 https://www.hsmagnets.com/blog/ndfeb-magnets-application/ https://www.wikihow.com/Magnetize-Metal https://www.inpeth.com/concept/+53EP7NzDnkuDkaNyN3Cs49NG8XHX2J3V3a9T32rdusS3Wb5JechQHNoIzmAsBCS http://andsecscience.weebly.com/demagnetisation.html https://www.youtube.com/watch?v=MhhHIdAkzZQ