10. Magnets

5G10.20 Break a magnet

20. Magnet Domains and Magnetization

5G20.1 Compass Array Model of Domains 5G20.2 Retentivity of Iron Toroid

30. Paramagnetism and Diamagnetism

5G30.20 Paramagnetism of (liquid) oxygen

50. Temperature and Magnetism

5G50.15 Curie Point of Nickel 5G50.50 Magnetic Levitation -- Meissner Effect