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EDELMAN UNDERSTANDING ULTRASOUND
PHYSICS QUESTIONS WITH 100% VERIFIED
ANSWERS (2025)
Is cholesterol level and longevity
a. inversely related
b. directly related
c. unrelated - correct-answer-a. inversely related. cholesterol increases, lifespan
decreases.
Is smoking and the likelihood of cardiovascular disease
a. inversely related
b. directly related
c. unrelated - correct-answer-b. directly related
Using a particular ultrasound system and transducer, which of the following
cannot be changed by the operator?
A. Wavelength
B. Frequency
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C. Intensity
D. Propagation Speed
E. Period
F. Power
G. Amplitude (initial) - correct-answer-The following can or cannot be changed:
A. cannot
B. cannot
C. can
D. cannot
E. cannot
F. can
G. can
True or False A wave with a frequency of 15,000 MHz is ultrasonic - correct-
answer-True. Ultrasound is greater than 20,000 hz
True or false. if the amplitude of a wave is increased to 3 times the original value,
the intensity is increased by 6 times. - correct-answer-False. intensity is
proportional to amplitude squared.
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true or false. If the power of a wave is halved, the intensity is reduced to one-
fourth its original value. - correct-answer-false. power is proportional to intensity.
if power is halved, intensity is halved
true or false. propagation speed increases as frequency increases - correct-
answer-false. propagation speed is determined by the medium only
Medium 1 has a density of 9 and a stiffness of 6. medium 2 has a density of 8 and
a stiffness of 6. Which medium will sound travel slower - correct-answer-Medium
1. greater density= lower speed
Which of the following characteristics will create the fastest speed of sound.
a. high density, high stiffness
b. low density, high stiffness
c. high density, low stiffness
d. low density, low stiffness - correct-answer-b. low density, high stiffness. speed
is inversely proportional to density and directly proportional to stiffness.
Which of the following characteristics will create the slowest speed of sound?
a. high density, high stiffness
b. low density, high stiffness
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c. high density, low stiffness
d. low density, low stiffness - correct-answer-c. high density, low stiffness
If the power in a beam is 1 watt and the area is 5 cm^2, what is beams intensity?
A) 5 W/cm^2
B) 1 W/cm^2
C) 0.2 W/cm^2
D) 1 watt - correct-answer-c. .2 w/cm^2
Ever 3 dB change means that the intensity will - correct-answer-double
Every 10 dB change means that the intensity will - correct-answer-Increase 10
times
A reduction in the intensity of a sound beam to 1/2 of its original value is? -
correct-answer--3 dB
EDELMAN UNDERSTANDING ULTRASOUND
PHYSICS QUESTIONS WITH 100% VERIFIED
ANSWERS (2025)
Is cholesterol level and longevity
a. inversely related
b. directly related
c. unrelated - correct-answer-a. inversely related. cholesterol increases, lifespan
decreases.
Is smoking and the likelihood of cardiovascular disease
a. inversely related
b. directly related
c. unrelated - correct-answer-b. directly related
Using a particular ultrasound system and transducer, which of the following
cannot be changed by the operator?
A. Wavelength
B. Frequency
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C. Intensity
D. Propagation Speed
E. Period
F. Power
G. Amplitude (initial) - correct-answer-The following can or cannot be changed:
A. cannot
B. cannot
C. can
D. cannot
E. cannot
F. can
G. can
True or False A wave with a frequency of 15,000 MHz is ultrasonic - correct-
answer-True. Ultrasound is greater than 20,000 hz
True or false. if the amplitude of a wave is increased to 3 times the original value,
the intensity is increased by 6 times. - correct-answer-False. intensity is
proportional to amplitude squared.
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true or false. If the power of a wave is halved, the intensity is reduced to one-
fourth its original value. - correct-answer-false. power is proportional to intensity.
if power is halved, intensity is halved
true or false. propagation speed increases as frequency increases - correct-
answer-false. propagation speed is determined by the medium only
Medium 1 has a density of 9 and a stiffness of 6. medium 2 has a density of 8 and
a stiffness of 6. Which medium will sound travel slower - correct-answer-Medium
1. greater density= lower speed
Which of the following characteristics will create the fastest speed of sound.
a. high density, high stiffness
b. low density, high stiffness
c. high density, low stiffness
d. low density, low stiffness - correct-answer-b. low density, high stiffness. speed
is inversely proportional to density and directly proportional to stiffness.
Which of the following characteristics will create the slowest speed of sound?
a. high density, high stiffness
b. low density, high stiffness
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c. high density, low stiffness
d. low density, low stiffness - correct-answer-c. high density, low stiffness
If the power in a beam is 1 watt and the area is 5 cm^2, what is beams intensity?
A) 5 W/cm^2
B) 1 W/cm^2
C) 0.2 W/cm^2
D) 1 watt - correct-answer-c. .2 w/cm^2
Ever 3 dB change means that the intensity will - correct-answer-double
Every 10 dB change means that the intensity will - correct-answer-Increase 10
times
A reduction in the intensity of a sound beam to 1/2 of its original value is? -
correct-answer--3 dB
