Chapter 4 Test GOOD LUCK! Name Email 1. Rarefaction describes a region of:Low pressure High pressureHigh densityLow attenuation2. The reciprocal of the period is known as:AmplitudeWavelengthFrequencyIntesity3. If the wavelength of a 2 MHz transducer is 0.77mm, then was is the wavelength of a 10MHz transducer?0.154 mm0.385 mm0.77 mm3.85 mm4. What is the term Hertz equal to?SecondsCycles per secondmm per secondmm5. The period of an ultrasound wave is:Independent of the frequencyThe distance a wave travelsThe time it takes for one complete cycleDependent on the medium6. The period for a 10 MHz transducer is:0.1 cycles per second0.1 seconds0.1 mseconds0.1 µsec7. Which of the statements below about amplitude is incorrect?It is the strength of a sound waveIt is determined by the sound sourceIt can be measured in cycles per secondIt changes as it moves through a medium8. If the amplitude is increased by a factor of 4, then the powerDecreases by a factor of 4Decreases by a factor of 16Increases by a factor of 4Increases by a factor of 169. The units for Intensity are:Pascals (Pa)Watts/Cm^{2}mmhgcm/s10. Assuming the same area, if the power is increased what will happen to the intensity?DecreasesIncreases proportionally Increases by a factor of 2Doesn't changeEnter your text here