Physics Test #1 Chapter 2 Part 1
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- 1.A wave is a traveling variation in quantities called?
- 2.Sound is a traveling variation in quantities called?
- 3.Ultrasound is a sound with a frequency greater than ________Hz
- 4.Acoustic Variables include __________, __________, and __________ _________*3 Variables*
- A.
Wave
- B.
Pressure
- C.
Density
- D.
Particle Vibration
- 5.Which of the following frequencies are in the Ultrasound Range?
- A.
15 Hz
- B.
15,000 Hz
- C.
15 MHz
- D.
30,000Hz
- E.
0.04 MHz
- 6.Which of the following are Acoustic Variables? ***More than one correct answer***
- A.
Pressure
- B.
Frequecy
- C.
Propagation Speed
- D.
Particle Motion
- E.
Period
- 7.Frequency is a measure of how many ______ an acoustic variable goes through in a second.
- 8.The unit of frequency is ______, which is abbreviated________
- 9.Period is the ______ that it takes for one cycle to occur.
- 10.Period decreases as ____________ increases.
- 11.Wavelength is the length of ______ over which one cycle occurs
- 12.Propagation Speed is the speed with which a ________ moves through a medium in 1 second.
- 13.Wavelength is equal to _________ ________ divided by _________
- 14.The _________ and_________ of a medium determine Propagation Speed
- 15.Propagation Speed Increases if ____________ is Increased.
- 16.The average Propagation Speed in soft tissues is ?
- A.
1,540 m/s
- B.
1,540 mm/us
- C.
1.54 m/s
- D.
1.54 mm/us
- 17.Propagation Speed is determined by
- A.
Frequency
- B.
Amplitude
- C.
Wavelength
- D.
Period
- E.
Medium
- 18.The wavelength of 7-MHz ultrasound in soft tissue is __________mm
- 19.Wavelength in Soft Tissue _________ as Frequency Increases
- 20.It takes ________us for ultrasound to travel 1.54cm in Soft Tissue
- 21.Propagation Speed in Bone is ______ than in Soft Tissue.
- 22.Sound travels fastest in?
- A.
Air
- B.
Helium
- C.
Water
- D.
Steel
- E.
A Vacuum
- 23.Solids have higher propagation speeds than liquids because they have greater
- A.
Density
- B.
Stiffness
- 24.Sounds travels slowest in?
- A.
Gases
- B.
Steel
- 25.Sound is a _____________wave *More than 1 correct answer*
- A.
Mechanical
- B.
Longitudinal
- C.
Compressional
- 26.If Frequency in Soft Tissue is Doubled, Propagation Speed is _________....
- 27.
- 28.From given values for propagation speed and frequency, which of the following can be calculated?
- A.
Amplitude
- B.
Impedance
- C.
Wavelength
- D.
Amplitude and Impedance
- E.
Impedance and Wavelength
- 29.If two media have different stiffness, the one with the higher stiffness will have the higher propagation speed.
- A.
True
- B.
False
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