# Physics Final

 Period variable T Frequency variable f Amplitude variable A Wavelength variable λ Wavelength definition the distance between any two successive parts of a wave Amplitude definition the magnitude of the maximum displacement, or the maximum distance, from the particles equilibrium position Frequency definition the number of waves per second that pass by a given point during each second Frequency formula f=1/T Period definition the time for one complete wavelength to pass by a given point Wave Speed formula v=λf Transverse wave: the disturbance occurs perpendicular to the direction of travel of the wave. Example: wave on a stretched string Longitudinal wave: the disturbance occurs parallel to the direction of travel of the wave. Example: sound Frequency range of the human ear: 20 Hz to 20 kHz Principle of Superposition At any time, the combined waveform of two or more interfering waves is given by the sum of the displacements of the individual waves at each point in the medium Tube open at both ends: has displaced antinodes at both ends. L=n(1/2λn) Tube open at one end: has displaced antinode at the open endhas displaced node at closed end L=m(1/4λm) Tube open at both ends: Fn= n= Fn= V/λn = n(v/2L) = nf1 n= 1,2,3,... Tube open on one end: Fm = m= Fm = V/λm = m(V/4L) = mf1 m= 1,3,5,... Intensity = Loudness Frequency = Pitch Harmonics = Quality β = 10 log (I/I0) I0 = 10-12 w/m2 Doppler Effect Formula o= s= v= Fo = ((V±V0) / V∓V0)) fs o= observers=sourcev=speed of sound Doppler Effect: towards top signs Doppler Effect: away bottom signs Authorandreabyerly ID56058 Card SetPhysics Final DescriptionPhysics Final Updated2010-12-15T02:12:39Z Show Answers