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### 35 Cards in this Set

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 Transverse Wave wave in which the medium is displaced perpendicularly to the direction of wave propagation Period (T) T = 1/f f = frequency The velocity is only dictated by the nondispersive _______ medium Two aspects of the medium affecting the velocity: 1) the medium's resistance to change in shape 2) the medium's resistance to change in motion Why do sound waves travel FASTER in water? Because the bulk modulus is very high. For a gas, the velocity increases with ______________ temperature Surface Waves -Velocity does not change w/ density -Velocity increases as depth increases In deep liquid, a dispersive medium, the velocity increases w/ the _____________ wavelength Power Rate at which a wave transfers energy I(intensity) = (1/2)*d*w^2*A^2*v d = density of medium w = angular frequency What are two factors of medium? density and velocity Decibels B = 10*log(I/Io) Io = threshold intensity B = intensity level If intensity increases by factor of 10, decibels increase by 10, if I increases by 100, dB increases by 20, etc Beats occur when two waves with slightly different frequencies are superimposed f(beat) = abs(f1 - f2) f1 and f2 = frequencies of original waves When a wave reflects off a denser medium, the wave is ________ inverted When a wave reflects off a less dense medium, the wave is ____________ reflected upright When a wave transfers from one medium to the next, the wavelength __________ and the frequency ____________ changes, remains the same First Harmonic -Fundamental Wavelength -Fewest # of nodes -Distance from one wall to another = half a wavelength Equation for double-closed or open standing wave pipe L = n*(nth wavelength) / 2 n = 1,2,3,etc Equation for one-sided open/closed standing wave pipe L = n*(nth wavelength) / 4 n = 1,3,5,etc Resonant Frequency v = f*w f = frequency w = wavelength Resonance Condition where the natural frequency and the driving frequency are equal Decibels B = 10*log(I/Io) Io = threshold intensity B = intensity level If intensity increases by factor of 10, decibels increase by 10, if I increases by 100, dB increases by 20, etc Beats occur when two waves with slightly different frequencies are superimposed f(beat) = abs(f1 - f2) f1 and f2 = frequencies of original waves When a wave reflects off a denser medium, the wave is ________ inverted When a wave reflects off a less dense medium, the wave is ____________ reflected upright When a wave transfers from one medium to the next, the wavelength __________ and the frequency ____________ changes, remains the same First Harmonic -Fundamental Wavelength -Fewest # of nodes -Distance from one wall to another = half a wavelength Equation for double-closed or open standing wave pipe L = n*(nth wavelength) / 2 n = 1,2,3,etc Equation for one-sided open/closed standing wave pipe L = n*(nth wavelength) / 4 n = 1,3,5,etc Resonant Frequency v = f*w f = frequency w = wavelength Resonance Condition where the natural frequency and the driving frequency are equal Period of motion for mass on a spring T = 2*pi*sqrt(m/k) Period of motion for a pendulum of length L T = 2*pi*sqrt(L/g) Angular Frequency for a mass on a spring: w = sqrt(k/m) Angular Frequency for a pendulum: w = sqrt(g/L) Doppler Effect df/fs = v/c fs = frequency of source