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Free ARDMS SPI Exam Practice Questions
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Question 1 of 10Perform Ultrasound Examinations
A sonographer is reviewing how much of a beam is returned at a boundary. Sound strikes the interface at normal incidence, going from a medium with an acoustic impedance of 1.5 Mrayl into a medium with an impedance of 4.5 Mrayl. What percentage of the incident intensity is reflected?
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