Ultrasounds are sound waves with frequencies too high for the upper audible limit of human hearing, and this can merely be “heard” through sight, with images gathered from ultrasound machines. What can you tell us about the physics behind this?
1540
1450
4000
500
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True
False
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Reflection
Attenuation
Refraction
Scattering
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True
False
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Inversely
Directly
None
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Inversely
Directly
None
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Inversely
Directly
None
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Watts
Milliwatts
Watts/cm²
Megawatts
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Increase stiffness= Increased speed
Increased stiffeness= Decreased speed
None
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True
False
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Inversely
Directly
None
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True
False
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Medium only
Vaccum only
Both
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True
False
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Inversely
Direct
None
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500
4000
1560
330
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Inversely
Directly
None
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Increase Density= Increased speed
Increased Density= Decreased speed
None
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Millimeters
Centimeters
Watts
Milliseconds
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Mm
Cm
W/cm
Ms/s
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1-2 Hz
2-10 Hz
1-2 MHz
2-10 MHz
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Neither
Constructive
Both
Destructive
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Inversely
Directly
None
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Reflection
Refraction
Scattering
Absorption
All occur at same levels
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Inversely
Directly
None
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Destructive
Constructive
Neither
Both
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True
False
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Increased pressure, decresed density
Increased pressure, increased density
Decreased pressure, decreased density
Decreased pressure, increased density
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Pascals
Decibels
Watts
Hertz
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1560
1700
3500
4000
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Lead
Pulsing
Zirconium
Titanium
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Pressure
Temperature
Density
Partical Motion
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Directly
Inversely
Both
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Absorption decreases exponentially with an increase in frequency
Absorption decreases exponentially with an increase in frequency
Absorption increases exponentially with an increase in frequency
Absorption increases exponentially with a decrease in frequency
None of the above
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Inversely
Directly
None
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None
Inversely
Direct
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During Transmission
Neither
Either
During Reception
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Increased pressure, decresed density
Increased pressure, increased density
Decreased pressure, decreased density
Decreased pressure, increased density
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Inversely
None
Direct
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1-3 Pa
.1-.3 MPa
1-3 MPa
2-4 MPa
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Intensity
Frequency
Power
Propagation Speed
Period
Wavelength
Amplitude
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Regular
Huygen
Backscattering
Rayleigh
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Inversely
Directly
None
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Slower
The same
Faster
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Seconds
Milliseconds
Microseconds
Nanoseconds
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None
Inversely
Direct
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Medium only
Vaccum only
Both
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.1-.5 µs
.01-.15 µs
.05-.1 ms
.1-.5 ms
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Quiz Review Timeline (Updated): Mar 20, 2023 +
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