SPI PRACTICE QUESTIONS with correct answers

Sound waves are: - Answer longitudinal, mechanical The speed of sound in soft tissue is closest to: - Answer 1,500 m/s The frequency closest to the lower limit of ultrasound is: - Answer 15,000 Hz Which is not an acoustic variable? - Answer intensity The effects of soft tissue on ultrasound are called: - Answer acoustic propagation properties All of the following are true EXCEPT: - Answer two waves with identical frequencies must interfere constructively Put in decreasing order: deci, deca, micro, centi - Answer deca, deci, centi micro ______________ is the time to complete one cycle - Answer period Which of the following sound waves is ultrasonic and least useful? - Answer 30 KHz What is the frequency of a wave with a 1 msec period? - Answer 1 KHz