AST 2002 Lecture Notes - Lecture 2: Nuclear Fusion, Strong Interaction, Weak Interaction
Document Summary
Earth short term: auroraes, interfere radio communication, kill power grids, damage electronica. Earth long term-maunder minimum and milankovitch hypothesis. Fusion- fuse atoms on the periodic table together. Fission- when you take atoms on the periodic table and break them apart. Nuclear fusion: h he in core. Strong force (binding, sticky f of p and n) over powers em forces: 4 forces in nature (gravity, electricity magnetism, strong force, weak force) Under high p and t positively charged nuclei overcome repelling em. Light charged particles do not like to stick together. 4 h nuclei 1 he nucleus + energy. Convective zone: plasma absorbs photons, energy transfers, hot gas rises, cooler gas sink. Origin of the solar system and extrasolar planets. 8-1 history of the atoms in your body. The p, n, and e- in your body existed within the first few minutes after big bang. After cooling, universe is about 75%h and about 25% he.
