Physics 500 Flashcards
A sound wave is:
a) transverse
b) electromagnetic
c) mechanical, longitudinal
d) transverse, longitudinal
c) mechanical, longitudinal
A compression area of a sound wave is:
a) high pressure, low density
b) low pressure, low density
c) high pressure, high density
d) low pressure, high density
c) high pressure, high density
A rarefaction area of a sound wave is:
a) high pressure, low density
b) low pressure, low density
c) high pressure, high density
d) low pressure, high density
b) low pressure, low density
Which of the following is considered an acoustic variable?
a) power
b) intensity
c) amplitude
d) pressure
d) pressure
Which of the following is a unit for pressure
a) lbs/in
b) N/m squared
c) kg/cm cubed
d) inches squared
b) N/m squared
Which of the following is a correct unit for density?
a) lb/in
b) mm Hg
c) centigrade
d) lbs/cm cubed
d) lbs/cm cubed
Which of the following waves propagate in a medium?
a) heat
b) light
c) x-ray
d) sound
d) sound
The range for ultrasound is:
a) less than 20 Hz
b) 20 Hz to 20,000 Hz
c) greater than 20 kHz
d) 2 MHz to 10 MHz
c) greater than 20 kHz
(BLANK) is the number of wave cycles per second.
a) Frequency
b) Period
c) Wavelength
d) Amplitude
a) Frequency
One kilohertz is equal to:
a) one cycle per second
b) 100 cycles per second
c) 1,000 cycles per second
d) 10,000 cyclers per second
c) 1,000 cycles per second
One Megahertz is equal to:
a) one cycle per second
b) one hundred cycles per second
c) one thousand cycles per second
d) one million cycles per second
d) one million cycles per second
The useful frequency range for clinical imaging ultrasound is:
a) 20 Hz
b) 20 Hz to 20 kHz
c) 1 Hz to 10 kHz
d) 2 MHz to 10 MHz
d) 2 MHz to 10 MHz
Frequency is determined by the:
a) source
b) medium
c) source and medium
d) sonographer
a) source
Frequency affects all of the following except:
a) wavelength
b) resolution
c) penetration
d) impedance
d) impedance
The time per cycle is:
a) frequency
b) period
c) wavelength
d) sound speed
b) period
The period for a 5 MHz probe is:
a) 0.2 cycles per second
b) 0.2
c) 0.2 µsec
d) 0.2 msec
c) 0.2 µsec
If frequency increases, period:
a) increases
b) decreases
c) varies
d) unchanged
b) decreases
Period is determined by the:
a) source
b) medium
c) source and medium
d) sonographer
a) source
Period multiplied by the number of cycles in a pulse equals:
a) amplitude
b) wavelength
c) pulse duration
d) sound velocity
c) pulse duration
The distance between cyclical peaks is:
a) frequency
b) period
c) wavelength
d) sound speed
c) wavelength
The symbol for wavelength:
a) delta
b) mu
c) lambda
d) Hertz
c) lambda
The wavelength of a 5 MHz probe in soft tissue is:
a) 5.0 mm
b) 0.3 mm
c) 3.0 mm
d) 1.54 mm
b) 0.3 mm
As frequency increases, wavelength (assume same medium):
a) increases
b) decreases
c) not affected
d) varies
b) decreases
Wavelength is determined by the:
a) source
b) medium
c) source and medium
d) sonographer
c) source and medium