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Physics Exam II: Sound Waves

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Across
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_____ frequency transducers provide improved penetration
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The number of complete cycles of an acoustic variable
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Determined by the sound source and the medium
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It's propagation speed of sound is 1540 m/sec
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The frequency (in MHz) of a transducer with a 0.25 usec period
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The time of a single cycle of sound
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Reciprocal of frequency
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Typical unit for power
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Sound is a _____ mechanical wave
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Wavelength's relationship to US frequency
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Sound is a _____ longitudinal wave
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Common US unit for frequency
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Sound frequencies from 20 to 20 kHz
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Sound frequencies below 2 Hz
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Cause of the decrease of the 3 "bigness" prametersofsound
Down
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Sound frequencies above 20 kHz
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Directly related to the square root of the US power
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The change between the average value and the maximum value of an acoustic variable
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Location of the highest intensity within the US beam
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The concentration of power over a specific area
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Determines the period of US
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_____ speed is the how fast US energy travels through a medium
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Common unit for US period
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The time at which work is done
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Determines the propagation speed of US
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Typical unit for US wavelength
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Directly related to US power
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An increase in this results in an increase in propagation speed of US
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US power will _____ with increasing imaging depths