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SG_Chap1

# SG_Chap1 - Chapter 1 Intro and Mathematical Concept...

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1 Chapter 1 Intro and Mathematical Concept Introduction: All things follow strict physics laws All physics laws we know can be described with mathematics To the point that we “impose” our math on nature 1.1 Length, mass and time (UNITS): Question: 3 cat + 2 dog = ? SI units (Le Systè me International d’Unit és) Fundamental units: Meter (m): length Kilogram (kg): mass Second (s): time

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2 Distance Length (m) Radius of visible universe: 1 x 10 26 To Andromeda Galaxy: 2 x 10 22 Average person: 1.7 Diameter of hydrogen atom: 1 x 10 -10 Diameter of proton: 1 x 10 -15 Foot, yard : they are also length units!. but, few use it Interval Time (s) Age of universe: 5 x 10 17 Bullet crossing the room: ~ 5 x 10 -3 ( Remember Neo in Matrix?) Light pulses used in UB lasers: 1 x 10 -13 Lifetime of top quark: 4 x 10 -25 Object Mass (kg) Milky Way Galaxy: 4 x 10 41 Earth: 6 x 10 24 Physics student: 7 x 10 1 Dust particle: 1 x 10 -9 Neutrino: 1 x 10 -38 Pounds: few use it
3 Meter: distance traveled by light during a time interval of 1/299 792 458 second!

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SG_Chap1 - Chapter 1 Intro and Mathematical Concept...

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