Physics 1 - Physics Chapter 1 The Science of Physics The...

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Physics Chapter 1: The Science of Physics
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The Science of Physics Physics Is Everywhere! Motion Heat Sound Light Electricity
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The Science of Physics Scientific Method Observation Questions Hypothesis Experimentation Proven Results Theory Unexpected Results Revise Hypothesis Experimentation Prediction
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The Science of Physics Scientific Model A Representation of an Object or Event Explains Basic Features of Complex Systems Allows Scientists to Test Hypotheses on a Realistic Scale Humans Meteor Impact Gravity in the Universe
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The Science of Physics Branches of Physics Mechanics Wave Phenomenon Optics Thermodynamics Electromagnetism Relativity Quantum Mechanics
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The Science of Physics Le Système International d’Unités SI Units Universally Used by Scientists With exceptions British Engineering Foot, slug, BTU
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The Science of Physics SI Units (Base) Length – meter (m) Mass – kilogram (kg) Time – second (s) Temperature – Kelvin (K) Amount – mole (mol)
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The Science of Physics SI Units (Derived) Area – square meter (m 2 ) Volume – cubic meter (m 3 ) Density* – kilogram/cubic meter (kg/m 3 ) Pressure – Pascal kg/m*s 2 (Pa) Energy – Joule kg*m 2 /s 2 (J)
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The Science of Physics
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The Science of Physics Greek Prefixes Multipliers of SI Units Giga G 10 9 Mega M 10 6 Kilo k 10 3 Centi c 10 -2 Milli m 10 -3 Micro μ 10 -6 Nano n 10 -9
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The Science of Physics Converting Unit Quantities Examples: 665cm = 665x10 -2 m = 6.65m (decimal moves left, add to exponent) 665km = 665x10 3 m = 6.65x10 5 m
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The Science of Physics Converting Unit Quantities Examples (cont.): 112g = 1.12x10 2 g = 1.12x10 -1 kg (0.112kg) 200Gs = 200x10 9 s = 2x10 11 s 40ns = 40x10 -9 s = 4x10 -8 s
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The Science of Physics Converting Unit Quantities Examples (cont.): 12km = _____________m 225mm = ____________m 34cm = ______________m 650nm = _____________m
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The Science of Physics Converting Unit Quantities Examples (cont.): 180g = _____________kg 125mg = ____________kg 43 μ g = ______________kg
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The Science of Physics Converting Unit Quantities Examples (cont.): 450ns = _____________s 22min = ____________s 4hrs 12min = ______________s
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The Science of Physics Measurement Precision Your Ability to Reproduce Measurements Accuracy How Close is Your Measurement to the Actual Measurement?
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