physics ultrasound

Define acoustic propagation properties

the effects of the medium upon the sound wave

Define biologic effects

the effects of the sound wave upon the biologic tissue

define sound

a type of wave that carries energy, not matter, from place to place

Sound is a series of:

compressions and rarefactions

Sound must travel through a medium; sound cannot travel through a __________

vacuum

sound is a ________________, ________________ wave

mechanical, longitudinal

Sound travels in a __________ _____

straight line

What are the acoustic variables?

Pressure, density, distance

Acoustic variables ____________ which waves are sound waves

identify

Define pressure

Concentration of force within an area Force/area

Pressure units:

Pascals (Pa)

Density units:

Kg/cm^3

Define Distance

Measure of particle motion

Distance units:

distance, mm or cm

What is a transverse wave?

Particles move in a perpendicular direction to the wave's direction

What is a longitudinal wave?

Particles move back and forth in the same direction as the wave

TRUE OR FALSE acoustic parameters are used to describe the characteristics of sound waves.

True

TRUE OR FALSE interference occurs due to in-phase and out-of-phase sound waves

True

how is the age of a loaf of bread related to its freshness?

inversely

how many hertz is 5Mhz?

5,000,000

what is the reciprocal os 1/6

6

all of the following are true about sound waves expect

a. they are transverse

b. they are acoustic

c. they are pressure waves

d. they move energy

a. they are transverse

what units are used to report the pressure of a sound beam

pascals

the study of the effects of sound waves on biological tussle is know as

biologic effects

sounds is a _ and _ wave

mechanical, longitudinal

list these metric terms in increasing order;

mega, micro,mili, hecto, deca, deci

micro, milli, deci, deca, hecto, mega

which of the following is an appropriate unit for area

a. seconds

b. yards

c. inches

d. cm ^3

e. square yards

e. square yards

which of the following is not an appropriate unit for volume?

a. cubic miles

b. gallons

c. cm

d. cm^3

e. pint

c. cm

list these metric terms in increasing order:

a. mega

b. micro

c. milli

d. hecto

e. deca

f. deci

b. micro

c. milli

f. deci

e. deca

d. hecto

a. mega

List these metric terms in DECREASING order:

A. nano

B. centi

C. giga

D. kilo

E. hecto

F. micro

c. giga

d. kilo

e. hecto

b. centi

f. micro

a. nano

how many milliliters are in 8 liters?

a. 1/8

b. 8

c. 80

d. 800

e. 8000

e. 8000

milli means thousandth.

1 liter contains 1000 milliliters

how many centimeters are in 3 meters?

a. 1/300

b. 1/3

c. 3

d. 300

e. 3000

d. 300

centi means hundredth

How many kilometers are in 3000 meters?

a. 1/300

b. 1/3

c. 3

d. 300

e. 3000

c. 3

kilo means thousand

what is the reciprocal of 100?

a. 0.1

b. 100

c. 0.2

d. 0.01

e. 1/50

d. 0.01

what is the reciprocal of 1/8?

a. 80

b. 10

c. 1

d. 8

e. 72

d. 8

How many hertz is 3MHz?

a. 3,000,000

b. 3,000

c. 333

d. 0.003

a. 3,000,000

how many milliliters are contained in a jar filled with 5 liters of fluid?

a. 5

b. 5000

c. 500

d. 0.005

b. 5000

how many liters are contained in 80 ml of fluid?

a. 8

b. 80

c. 0.008

d. 0.080

d. 0.080

how much bigger is a thousand than ten?

a. 10 times

b. 100 times

c. 1000 times

d. 500 times

b. 100 times

how much bigger is a billion than a million?

a. 10 times

b. 100 times

c. 1000 times

d. 500 times

c. 1000 times

how much smaller is a hundred than a thousand?

a. 1/10

b. 1/100 times

c. 1/1,000 times

d. 1/10,000 times

a. a hundredth is one-tenth of a thousandth

what is the vertical axis of a graph called?

a. z-axis

b. x-axis

c. y-axis

d. time-axis

c. y-axis

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

a. z-axis

b. x-axis

c. y-axis

d. red axis

b. x-axis

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

a. inversely

b. conversely

c. directly

d. unrelated

c. directly related

How are caloric intake and weight related?

a. inversely

b. partially

c. reciprocally

d. directly

d. directly

what is the reciprocal of 1000?

a. one-hundreth

b. 1000

c. 0.001

d. one-millionth

c. 0.001

what is the reciprocal of 5?

a. one-hundreth

b. 5

c. 1/5

d. one-millionth

c. 1/5

what is the reciprocal of 1/10?

a. one-hundreth

b. 10

c. 1/10

d. one-millionth

b. 10

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 pounds

b. 11 pounds

c. 60 pounds

d. 30 pounds

d. 30 pounds

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

a. 27

b. 0

c. 10

d. 15

c. 10

30/3

which of the following is not a measure of area?

a. squared cm

b. meters squared

c. cubic meters

d. feet times feet

c. cubic meters

a songrapher measures the perimeter of an atomically structure. which of the following choices is a reasonable value for the measurement?

a. 6 cm^2

b. 5 cc

c. 15 mm

d. 18 db

c. 15 mm

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

a. mm

b. mm^2

c. cm^3

d. m^4

a. mm

The volume of a 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

d. cm ^3

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 a centimeter

D. the direction of red blood cell motion and the Doppler shift frequency

c.

how much bigger is one billion than one thousand?

a. a thousand times

b. one million times

c. ten times

d. ten-thousand times

b. one million times

Select the sequence that appears in increasing order.

A. mega, kilo, hecto, milli, giga

B. nano, milli, micro, deci, deca, mega

C. centi, deci, deca, hecto

D. milli, hecto, centi, deci, nano, giga

c.

centi

deci

deca

hecto

How many nano seconds are in 7 seconds?

a. 7,000,000

b. 7,000,000,000

c. 7 million

d. 0.00000007

b. 7,000,000,000

The letters below represent the abbreviations for the prefixes of the metric system. Select the sequence that appears in decreasing order. (u stands for the reversed u in "micro").

a) m, k, M, g, da

b) g, m, k, d, u

c) g, k, di, m, u, n

d) M, k, da, d,

d. m, k, da, d

match the following prefixes with their meaning

a. mega. 1. hundredth

b. hecto. 2. thousands

c. milli. 3. thousandths

d. kilo. 4 millions

e. nano. 5. billions

f. giga 6. billionths

a. 4

b. 1

c. 3

d. 2

e. 6

f. 5

Which term is the reciprocal of mega?

A. nano

B. kilo

C. macro

D. micro

d. micro

How can the volume of an irregularly shaped object be taken?

a. by visual inspection

b. by its weight

c. by immersing it in water

d. ultrasound scanning

c. by immersing it in water