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Carnegie Physics
practice quiz properties of sound
Question | Answer |
---|---|
the term compression zone describes: | a region of high density or pressure in the wave |
density, particle motion, temperature and pressure are considered | acoustic variables |
the average speed of sound in soft tissue is | 1.5 4 millimeters per micro second, 1.5 4 meters per millisecond |
True orfalse: thickness of the crystal is equal to the first phase | true |
Which wave provides better image resolution? | High Frequency |
Which wave provides deeper penetration? | Low Frequency |
A thinner crystal does what to the wave? | Increases the Frequency |
Do higher frequency waves travel faster than lower frequency ones? | No, They travel at the same speed when in the same medium. |
The unit which means cycles per second is the? | Hertz |
Quartz crystal has the ability to emit an electrical signal when pressure is applied to it. This property is called the? | Piezoelectric effect |
What is the speed of sound through soft tissue? | 1.54 mm/μsec |
What is a frequency within the high end of the audible range? | 15 kHz |
What is a frequency within the ultrasound range? | 15 MHz |
Ultrasound is a form of? | Periodic motion |
Which acoustic variable is measured in g/cm3 | Density |
Which property remains constant as ultrasound propagates through the body? | Frequency |
Which properties always decrease as ultrasound propagates through the body? | Amplitude, Intensity, and Power |
How does ultrasound behave when hitting something stiff? | Velocity increases |
The distance a sound wave travels during one cycle is the? | Wavelength |
Frequency is inversely related to? | Period |
What is true of all waves? | They carry energy from one site to another |
If the frequencies of two waves are identical, what can be said about their periods? | Also identical |
Three sound waves leave a common location at the same time. One is infrasonic, one is audible and one is ultrasonic. They travel through the same medium towards the same reflector. which would arrive first? | All would arrive at the same time |
True or False: The frequency of a wave is determined by the medium through which the wave travels. | False |
The velocity of a sound wave is determined by? | Medium |
What is the unit for wavelength? | Meters/Cycle |
What is the Unity for frequency? | Hertz |
What is the unit for period? | Seconds/cycle |
What is the unit for Speed? | Meters/second |
Which frequency of wave has shorter wavelengths? | High |
What frequency of wave has a longer period? | Low |