ASTR 1101 Lecture Notes - Lecture 4: Charged Particle, Electric Field, Angular Diameter
9 Feb 2020
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Document Summary
Distance: measured from parallax, found out distance via transit of venus, 1 au = 150 x 10^6km. Size: measure angular size, a, measure distance from parallax, d, calculate actual diameter, d. Mass: use central mass formula to calculate mass. Periodic table: each chemical element has a unique atomic number representing the number of protons in its nucleus. Isotope a form of an atom with the same number of protons but a different number of neutrons. Electromagnetic wave: electric waves generate magnetic waves, magnetic waves generate electric waves, a self-sustaining electromagnetic wave can travel through a vacuum. Thermal energy: atoms and molecules are constantly in motion, thermal energy the total energy due to motion. Temperature: measures the average speed of the particles, hotter particles are moving faster on average, colder particles are moving slower on average. Heat: heat energy transferred from a hotter object to a cooler object.
