# Shared Flashcard Set

## Details

AP PHYSICS B
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36
Physics
04/30/2009

Term
 Simple Harmonic Motion descriptions
Definition
 Amplitude (A) = meters Frequency (f) = 1/seconds = Hertz Period (T) = seconds
Term
 Hooke's Law
Definition
 Fspring = -kx   x is the stretched length of the spring k is spring constant (N/m)
Term
 Relationship between period and physical properties of a simple harmonic oscillator
Definition
 2(pi)(sqr m/k)   m = mass bigger the mass the slower it goes
Term
 Simple pendulum
Definition
 T=2(pi)(sqr L/g)   L=length of pendulum g = gravity (9.8)
Term
 Energy and simple harmonic motion
Definition
 Total Energy = Potential Energy + Kinetic Energy   Etotal = KE + Uspring   Etotal = 1/2mv(sqr) + 1/2kx(sqr)
Term
 Displacement for x in simple harmonic oscillators
Definition
 Fspring = Work k(delta x) = mg
Term
 Transverse Waves vs. Longitudinal Waves
Definition
 vibrate in a direction perpendicular to the medium vs. vibrate in a direction parallel to the medium
Term
 Velocity of a wave
Definition
 v = (lambda)f [[aka v = wavelength x frequency]]   (m/s)   lambda = wavelength f = frequency
Term
 What does the speed of a wave depend on?
Definition
 THE SPEED OF A WAVE DEPENDS ON ITS MEDIUM   ((It's independent of wavelength and frequency))   speed of wave depends (sqroot Force Factor/ Mass of something)
Term
 What does the frequency of a wave depend on?
Definition
 THE FREQUENCY OF A WAVE DEPENDS ON ITS SOURCE
Term
 Antinodes vs Nodes in waves
Definition
 antinodes = loops nodes = points of no displacement between loops
Term
 Linear Expansion of Solid (like heating)
Definition
 (delta L) = (alpha)(Lo)(delta T)   Delta L = Change in Length Alpha = type of stuff...bigger alpha, faster things change temperature Lo = original length Delta T = change in temperature
Term
 Ideal Gas Law formulars   PV = nRT
Definition
 Pressure =  Force/ Area [[P = F/A]] ((N/m(sq) aka Pascal))   PV = N(Kb)T N=6.022 x 10^23 (molecules/mole) kb = 1.38 x 10^-23 (J/K) T = Temperature in Kelvin
Term
 Average Kinetic Energy of Molecules
Definition
 Kavg = (3/2)(Kb)(T)
Term
 Root Mean Square Velocity (rms)
Definition
 v(rms) = (sqroot 3RT/M) or (sqroot 3KbT/miew)   M = molar mass of gas miew = mass/molecule of gas
Term
 Heat equation
Definition
 Q = mc(delta T)   Q = transfer of energy due to difference in temperature c = specific heat
Term
 Internal Energy
Definition
 U = 3/2NkT   N = number of molecules kT = average energy per molecule
Term
 Conduction   (transfer of thermal energy through physical contact)
Definition
 H = (Delta Q)/ (Delta time) or =kA(delta T)/L   A=area L = Length through which heat is being transfered
Term
 Convection
Definition
 heat transfer through the movement of a fluid
Term
 First Law of Thermodynamics   -Change in internal energy can be either negative or positive. -If (deltaU >0) the energy in the system increases, if opposite the energy in the system decreases
Definition
 (delta U) = Q + W   W = P(deltaV)   If work is done ON the system, W > 0 If work is done BY the system, W < 0   I have U; I do W; and Q flows into me
Term
 -Thermodynamic Processes-   Isothermal
Definition
 -keeps the temperature constant (delta T) = 0 (delta U) = 0   SO -Q = W   PV = nKT
Term
Definition
 -no heat flows (Q = 0)   happens when something is done super fast
Term
 -Thermodynamic Processes-   Isobaric
Definition
 -Constant Pressure but change in volume   Q = (delta U) + W
Term
 Heat Engine + Ideal efficiency
Definition
 e = W/Qh   W = how much work you can do Qh = how much heat you can take out   Ideal - e = 1 - TL/TH
Term
 FRICTION
Definition
 miew of friction = Force of friction / Normal force
Term
 Motion Equations
Definition
 Displacement: (delta x) = xfinal - xinitial Average Velocity: v = (delta x)/(delta t) [[m/s]] Average Acceleration: a = (delta v)/(delta t) [[m/ssqr]]
Term
 Motion at Constant Acceleration
Definition
 v = vinitial + at   x = xinitial + vinitial(t) + 1/2a(tsqr)   vsqr = (vinitalsqr) + 2a(xfinal - xinitial)
Term
 Linear Momentum
Definition
 p = mv ((Ns))   p: momentum
Term
 Impulse
Definition
 J = F (delta t) = delta (mv)  [[kg m/s)   J = impulse
Term
 Elastic Collision
Definition
 Momentum is conserved in COLLISION   momentum and KINETIC ENERGY is conserved in elastic
Term
 Inelastic Collusion
Definition
 momentum is conserved, but kinetic energy is NOT   m1v2 + m2v2 = (m1 + m2) vf
Term
 Fluids
Definition
 Density:  rho = m/v  [[kg/m3]] Pressure:  P=F/A [[Pascal]]   Gauge Pressure: P = Pgauge + Pinitial
Term
 Magnetism
Definition
 Fb = qvBsin(theta) = ILB sin (theta)   EMF = -N(change in flux)/(deltatime)
Term
 Electric Charge + Forces
Definition
 Fe = k (q1q2)/Rsqr   Fe/Fg = kq1q2/Gm1m2
Term
 Electric Field
Definition
 E = Fe/q   E = kqs/Rsqr
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