PHYS 2010 - Chapter 1 Notes Week 1
PHYS 2010 - Chapter 1 Notes Week 1 PHYS 2010
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This 3 page Class Notes was uploaded by Nancy Kanarski on Friday August 26, 2016. The Class Notes belongs to PHYS 2010 at East Tennessee State University taught by Dhar in Fall 2016. Since its upload, it has received 62 views. For similar materials see Physics 1 in Physics at East Tennessee State University.
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Date Created: 08/26/16
Physics I – Week 1 notes August 2226 2 Branches of Physics Classical o Classical mechanics o Thermodynamics o Fluid mechanics o Electromagnetism o Optics o Wave mechanics Modern o Special relativity and general relativity o Quantum mechanics o Nuclear physics o Statistical mechanics o Condensed Matter Forces Contact: force is applied through collision o (Force=mass x acceleration) Field: force on object comes from its location in natural potential field o Position of earth and orbit around the sun Interaction (force) Strength Range Strong 1 10 m5 Electromagnetic 102 6 17 Weak 10 10 m Gravitational 1043 Structure Concept: idea or physical quantity Law: mathematical relationship btw. physical quantities Principle: general statement on how nature operates Model: representation of physical system Hypothesis: model not confirmed through experimentation Theory: confirmed hypothesis through experiments Unit of Measurement International standard (SI) o Length – meter (m) o Mass – kilogram (kg) o Time – seconds (s) Kilo 10 3 Giga 10 9 Milli 10 3 Nano 10 9 Mega 10 6 Tera 10 12 Micro 10 6 Pico 10 12 Scientific Notation m x 10 n m: mantissa 1.0 < m < 10 n: exponent < n < multiplication: 10 x 10 = 10m+n m n mn division: 10 /10 = 10 raising to a power: (10 ) = 10mn Coordinate System Cartesian coordinate o 2D (x, y) o 3D (x, y, z) Polar coordinates o 2D (r, ) Conversion o Polar to Cartesian x = rcos y = rcos o Cartesian to polar r = 2 2 √ x +y tan = y/x Dimensional Analysis m ar 2 a = G 2 G = r m 2 [a] = LT [r] = L [m] = M −2 2 [G] = LT L [G] = L T M [G] = m s kg 1 M brackets: what are the dimensions? Exponentials and Logarithms y = ax x = logay product: loga(xy) = logax +logay quotient: loga(x/y) = loa x – loa y power: log (a ) = nlog y a base 10: log a log =10 g base e: natural log: log a log e nl Scalars and Vectors Scalar: magnitude only (mass, temperature, speed) Vector: magnitude and direction information (velocity, force)