physics exam 1

what are the 3 acoustic variables

pressure, density, distance

what are the units for the 3 acoustic variables

pascals, kg/cm^3, units of distance

if something other than pressure, density, distance rhythmically oscillates in a wave, then it is a sound wave

false

acoustic _____ describe the characteristics of a sound wave

parameters

acoustic _____ allow us to determine which waves are sound waves and which are not

variables

what are the regions in a soundwave of low pressure and low density

rarefactions

are sound particles close or far from one another during rarefactions

far

longitudinal waves travel in the ____ direction as propagation

same

transverse waves travel _______ to the direction of propagation

perpendicular

which prefix is 10^-3

milli

what is the exponent for micro

10^-6

what is the symbol for mega

M

6 MHz = ____ Hz

6,000,000 Hz

what is the reciprocal of 2

0.5

what is the reciprocal of 0.1

10

are compression and rarefactions acoustic variables

no

how would you convert this exponential notation to regular form: 5.6×10^4

56,000

how would you write this number in scientific notation: 598,000,000

5.98×10^8

what power is a unit of area

squared

what are biological effects

the effect sound has on the medium

what are acoustic propagation properties

the effect the medium has on the sound

how would you describe the relationship between height and age in children

directly related

waves of different frequencies will have what kind of interference

constructive and destructive

sound waves transfer what from one location to another

energy

what is interference

when two or more waves interact with each other and arrive at a location at the same time

how are the size of a tree and its age related

directly

how are the height of a person and the color of his automobile related

unrelated

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

inversely

which of the following is an appropriate unit for area

square yards

which of the following is not an appropriate unit for volume

cm

how many mL are in one L

1,000

how many cm are in a m

100

how many cm are in a mm

10

how many meters are in a kilometer

1000

what is reciprocal of 100

1/100

what is the reciprocal of 1/8

8

how many hertz are in a MHz

1,000,000

what do waves transfer from one location to another

energy

which of the following best describes sound waves

a series of compressions and rarefactions

which of the following terms does not belong with the others

wide molecular spacing

variations in all of the following identify specific waves as acoustic waves except

parameters

all of the following are true of sound waves except

they are transverse

all of the following are acoustic parameters except

pressure

sound can be describes as a _____ ______ wave

mechanical longitudinal

two waves are traveling in a medium and arrive at a location at the same time. what event takes place

interference

which types of waves will exhibit both constructive and destructive interference

waves of different frequency

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

pascals

acoustic variables allow us to determine which waves are sound waves and which are not

true

acoustic parameters are used to describe the features of sound waves

true

how many acoustic parameters are there

7

what are the acoustic parameters

period, frequency, amplitude, power, intensity, wavelength, and propagation speed

what are the 3 types of scan formats

linear, sector array, curvilinear

who is doppler ultrasound named after

christian doppler

color doppler =

qualitative

spectral doppler =

quantitative

percentages are unitless

true

list the metric units from biggest to smallest

mega, kilo, centi, milli, micro

what two units have a exponent of 6

mega and micro

what two units have an exponent of 3

kilo and milli

what unit has an exponent of -2

centi

mega =

million

kilo =

thousand

centi =

hundredth

milli =

thousandth

micro =

millionth

sound cannot travel through a ______

vacuum

sound waves are identified by the _____ in acoustic variables

oscillation

what does in-phase waves result in

the formation of a single wave of greater amplitude

out of phase waves result in

a single wave of lesser amplitude

what acronym can be used to remember the 7 acoustic parameters

Pretty Flowers Are Pink In Warm Places