practice test cumulative exam quarter 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Regarding the parameters of an ultrasound waves it is impossible 4 | Frequency equals one hurts
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| Knowing the velocity and frequency of a wave would allow you to calculate | Wavelength and period
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| Comparing a 1 megahertz wave with the two megahertz wave, which of the following is true? | Period of the 1 megahertz wave is double the period Of the two megahertz wave
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| If an ultrasound wave travels from one medium with a density of 500 kg/m^3 to another medium with a density of 800 kg/m^3, which of the following would occur? | Propagation speed would increase
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| Maximum variation of an acoustic variable is .07 centimeters. Minimum variation is .03 centimeters. Find the amplitude. | 0.02 centimeters
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| What kind of energy is sound? | Mechanical
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| Which of the following may be represented as the unit of density, pressure, temperature or particle motion? | Amplitude
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| Which of the following could be expressed in units of megawatts per centimeter cubed? | Intensity
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| What is the advantage of using low frequency ultrasound waves? | They penetrate deeper through tissue
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| Sound is best described asA | Series of compressions and rarefactions in a medium
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| Sound waves with frequencies between 20 Hertz and 20 kilohertz are | Audible sound
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| As sound waves travel through the body their energy is mostly converted into | Heat
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| If the frequency equals 1.8 megahertz find the wavelength | 0.86 millimeters
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| The speed of sound depends on | Density and stiffness of the media
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| If the frequency of a wave is 5 megahertz, what is the period? | 0.2 microseconds
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| The frequency of an ultrasound wave with a. Of .08 microseconds is | 12.5 megahertz
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| What is the frequency of a transducer that produces a wavelength of 0.5 millimeters? | 3.1 megahertz
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| Propagation speed is doubled and frequency is constant, then the period is | Unchanged
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| Propagation speed is defined as the | Distance a wave travels in one second
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| Always traveling in medium one has a wavelength of 0.5 millimeters. It then travels into a new medium where its wavelength increases to 1 millimeter. What must be the speed in the new medium | Twice the speed of medium 1
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| The term rarefaction refers to the: | Low-energy phase valley of a wave cycle
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| What is proportional to the square of the amplitude? | Power
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| Listen example of two things directly related? | Crystal thickness and wavelength
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| Just found beams with different frequencies are traveling through the same medium. The higher frequency wave has | A shorter period and a shorter wavelength
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| If the frequency of ultrasound wave is three times the frequency of wave B then the period of wave a is blank the period of wave B | 1/3
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| Compare the wavelength of a 5 megahertz transducer to a 2.5 megahertz transducer. The wavelength of the higher frequency transducer is | Half as long
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| T equals 0.3 microseconds. Find F | 3.3 megahertz
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| Wavelength equals one millimeter. Find F. | 1.54 megahertz
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| A transducer with a period of 0.5 microseconds has a wavelength of: | .77 Millimeters
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| All of the following are acoustic variables that vary as a sound wave propagates through a medium except density, pressure, mass, temperature, particle motion | Mass
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| Higher frequency waves have: | Better resolution
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| If weve length equal 0.9 millimeters, find s | 1.7 megahertz
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| Frequency equals 20 megahertz. Find the period in microseconds. | 0.42 millimeters
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