ASTRON 101 Lecture Notes - Lecture 7: Olivine, Pacific Plate, Subduction
14 Aug 2018
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Practical (fire, agriculture, electric light, automobile, silicon chip/computers, internet) Fundamental (mathematics/geometry, kepler"s laws, dna, quantum mechanics, cosmic background radiation) If one object has twice the diameter of another, then all of its length dimensions double (such as radius, circumference) Its area increases in both length and width. Volume is measured in units like gallons, liters, cubic meters . If the diameter of an object doubles, its length, width, and height all double. Its volume becomes 2 x 2 x 2 times bigger. If the sun has 100 x the earth"s diameter, its volume is 100 x 100 x 100 = # earths = volume of sun/volume of earth = (4/3)prsun 3/(4/3)pre 3 = (rsun/re)3 = (100)3 = 106 = 1000000. Mass is a measure of the total amount of material in a body, usually written as m. Mass is the sum of the number of protons and neutrons in all the atoms.
