Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Ultrasound Physics > Chapter 1 & 2 > Flashcards

Chapter 1 & 2 Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

Is frequency an acoustic variable?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How are scores on the ultrasound board exams related to study time?

a) inversely
b) conversely
c) directly
d) unrelated

A

directly related

since scores increase when studying increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Is density an acoustic variable?

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How is weight related to a songrapher’s time spent exercising?

a) inversely
b) conversely
c) directly
d) unrelated

A

inversely related

exercise increases, while weight decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

As sound travels through a medium, what term describes the effects of the medium on the sound wave?

A

acoustic propagation properties

“acoustic” means sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the vertical axis of a graph called?

A

y axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A longitudinal wave propagated from east to west at a speed of 2 miles per hour. What is the direction of motion of the particles within the wave?

A

The waves move alternately from east to west and west to east

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Is intensity an acoustic variable?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which of the following is true of all soundwaves?

A) they travel through a medium
B) all carry energy from one site to another
C) their amplitudes do not change
D) they travel in a straight line

A

Waves carry energy from one place to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which term is the reciprocal of mega?

A

d- micro (millionth)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the units of a pressure measurement of an acoustic wave?

A

1) atmospheres (atm)
2) pascals (Pa)
3) millimeters of mercury (mm Hg)
4) pounds/sq inch (lb/in^2)

However, the pressure of a soundwave is most often reported in units of pascals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Is pressure an acoustic variable?

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the name of the horizontal axis of a graph?

A

x axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

milli means

A

thousandth
10^-3
m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the reciprocal of 1,000?

a) one- hundredth
b) 1,000
c) .001
d) one-millionth

A

.001

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which of the following is NOT a measure of area?

a) square cm
b) meters squared
c) cubic meters
d) feet x feet

A

cubic meters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

deci means

A

tenth
10^-1
d

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the units associated with the circumference of a circle?

mm
mm^2
cm^3
m^4

A

answer: mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Is wavelength an acoustic variable?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

A sack contains 6 pounds of flour. The contents of the bag are increased by a factor of 5. How much flour is in the bag?

A

6 x 5 = 30 pounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The letters below represent the abbreviations for the prefixes of the metric system. Select the sequence that appears in the decreasing order.

A) m, k, M, g, da
B) g, m, k, d, u
C) g, k, di, m, u, n
D) M, k, da, d, c

A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Select the sequence that appears in increasing order.

A) mega, kilo, hecto, milli, giga
B) nano, milli, deci, deca, mega
C) centi, deci, deca, hecto, kilo
D) milli, hecto, centi, deci, nano, giga

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

kilo means

A

thousand
10^3
k

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Waves that exist at the same location and time will combine. What is this called?

A

interference

25
Q

A bouquet has 30 flowers. The size of the bouquet is decreased by a factor of 3. How many flowers remain?

A

30 / 3 = 10 flowers

26
Q

Sound can be characterized as:

A

a wave- a rhythmical variation throughout time

27
Q

The volume of the cystic structure is estimated from sonographic data. Which of the following is an acceptable measurement of this volume?

a) 6
b) 6 cm
c) 6 cm^2
d) 6 cm^3

A

Answer: D - the units of volume are cubed

28
Q

A particle within a transverse wave is traveling vertically. What is the direction of the wave’s propagation?

A

horizontal

29
Q

mega means

A

million
10^6
M

30
Q

What term is used to describe the effects of an ultrasound wave on living tissues?

A

biological effects or bioeffects

31
Q

Name the correct units for the acoustic variable, density.

A

Pounds per inch cubed (lb/in^3)
-density is the concentration of mass per unit of volume. Mass is measured in lbs or kg

and kg/m^3
-Volume has units of length cubed such as cubic inches or cubic meters.

32
Q

which of the following types of waves do NOT require a medium in order to propagate? (select all that apply)

A) light
B) heat
C) sound 
D) television
E) none of the above
A

A, B, and D

33
Q

The direction of motion of a particle in a wave is perpendicular to the direction of propagation of the wave. What type of wave is this?

A

A characteristic of transverse waves is that the direction of propagation is perpendicular to the direction of the direction of the particle motion in the wave.

Sound waves are not transverse, but rather longitudinal.

34
Q

A sonographer measures the perimeter of an anatomical structure. Which of the following choices is a reasonable value for the measurement?

a) 6 cm^2
b) 5 cc
c) 15 mm
d) 18dB

A

perimeter means the length of the outer boundary of a structure. example) a square with an edge of of 5 inches long has a perimeter of 20 inches.

Answer: C) 15mm (length)

35
Q

Sound is best described as ____.

A

composed of a series of compressions and rarefractions.

36
Q

Which of the following describes characteristics of a sound wave?

a) longitudinal, non-mechanical
b) mechanical, transverse
c) transverse, acoustic
d) mechanical, longitudinal

A

Sound is a mechanical, longitudinal wave

37
Q

hecto means

A

hundred
10^2
h

38
Q

How many nanoseconds are in 7 seconds?

a) 7,000,000
b) 7,000,000,000
c) 7 million
d) 0.00000007

A

B- nano means billionth

39
Q

Is propagation speed an acoustic variable?

A

No

40
Q

deca means

A

ten
10^1
da

41
Q

How can the volume of an irregularly shaped object be measured most accurately?

a) visual inspection
b) its weight
c) immersing it in water
d) ultrasound scanning

A

C- volume of any object can most accurately be measured by immersing it in water and measuring the volume of water that is displaced

42
Q

centi means

A

hundredth
10^-2
c

43
Q

What is the reciprocal of 5?

A

1/5

44
Q

How are caloric intake and weight related?

a) inversely
b) partially
c) reciprocally
d) directly

A

directly related

45
Q

Is motion of particles in the wave an acoustic variable?

A

Yes

46
Q

Is voltage an acoustic variable?

A

No

47
Q

Name the correct units for the acoustic variable, particle motion.

A

miles and cm

48
Q

How much bigger is one billion than one thousand?

a) 1,000 times
b) 1,000,000 times
c) 10 times
d) 10,000 times

A

B) A billion is one million times larger than a thousand.

49
Q

A force is applied to a surface. If a surface is tripled and the surface area over which the force is applied is also tripled, what is the new measure?

A

Unchanged
-Pressure is the amount of force divided by the area to which it is applied. If the applied force is tripled, and at the same time, the area over which it is applied is tripled, then the pressure remains unchanged.

50
Q

What is the reciprocal of 1/10?

A

10

51
Q

All of the following are true about sound waves except____.

a) they are mechanical
b) they are transverse
c) they carry energy from place to place
d) they generally travel in a straight line

A

sound waves are longitudinal, they cannot be transverse

52
Q

micro means

A

millionth
10^-6
u

53
Q

Two waves arrive at the same location and interfere. The resultant sound wave is smaller than either of the two original waves. What is this called?

A

destructive interference

54
Q

A pair of waves are in phase. What occurs when these waves interfere?

A

constructive interference

55
Q

giga means

A

billion
10^9
G

56
Q

Name the correct units for the acoustic variable, pressure.

A

Pascals (Pa) and Pounds per square inch (lb/in^2)

57
Q

The speed of red blood cells traveling through a blood vessel is 750 cm/sec. You are asked to measure this speed in miles per hour. What information would be sufficient for you to complete your task?

a) how many seconds in a minute and how many blood cells in the vessel
b) the number of miles in a meter
c) how many seconds per hour and the number of miles in centimeter
d) the direction of red blood cell motion and the Doppler shift frequency

A

C

58
Q

nano means

A

billionth
10^-9
n

Ultrasound Physics (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions