ARDMS SPI 500 Question with complete solution 2023

ARDMS SPI 500 Question with complete solution 2023A sound wave is mechanical, longitudinal A compression area of a sound wave is high pressure, high density A rarefaction area of a sound wave is low pressure, low density Which is considered an acoustic variable pressure Which is a unit for pressure N/m2 Which is a unit for density lbs/cm3 Which wave propagates in a medium sound The range for ultrasound is greater than 20KHz ____ is the number of wave cycles per second frequency One kilohertz is equal to 1,000 cycles per second One megahertz is equal to 1,000,000 cycles per second The useful frequency range for clinical imaging ultrasound is 2 MHz to 10 MHz Frequency is determined by the source Frequency affects all of the following, except: wavelength, resolution, penetration, impedance impedance