EPS SCI 3 Study Guide - Quiz Guide: Solar Luminosity, Photon
17 Nov 2016
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Document Summary
Matter: ordinary matter is composed of atoms: number of atoms in a single drop of water is comparable to the number of stars in the universe. Atomic structure: nucleus: contains positively charged protons and neutral neutrons. Approximately 100,000x smaller than the atom but contains nearly all of its mass: electrons are smeared out in a cloud around the nucleus. Mass 1/2000 that of protons: atomic number: number of protons, atomic mass number: number of protons + neutrons, isotopes: same number of protons, different numbers of neutrons. Phases of matter: phases differ in the strength of the bonds between neighboring atoms and molecules. Mass: amount of matter in an object [kg: mass is not weight. Volume: physical space occupied by an object [m3] Density: mass/volume = mass per unit volume [kg/m3] Antimatter: matter and antimatter can annihilate, reverse process is called pair production. Kinetic energy: ekin=1/2mv2: thermal energy: kinetic energy of many particles, temperature measures the avg.
