EPS SCI 3 Lecture Notes - Lecture 1: Neutron Star, Big Bang, Antiparticle
17 Oct 2018
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Document Summary
Could be many other universes, can speculate about their existence. Tv static - 1% of signal is direct from big bang. Atomic structure: nucleus (protons and neutrons) nearly 100,000x smaller than the atom but contains most of its mass. Electrons have very small mass compared to protons. Atom with positive or negative charge = ion. Hydrogen most common atom in universe, then helium. Isotopes of a given element contain same # of protons but diff # of neutrons. A substance can behave very differently depending on its phase. Strength of bond is different in different phases, triggered by change in temp or pressure. Solid liquid gas (hundreds of k) molecular dissociation (thousands of k) plasma phase (tens of thousands of k) fully ionized plasma (millions of k) Lower pressure, higher temp = phase changes. Volume (m^3) = physical space occupied by an object. Every particle of matter has corresponding antiparticle.
