Equations And Units

Question 1

What is the equation for pressure

Answer 1

Pressure= force/area

Question 2

What is the 2 units for pressure

Answer 2

N/m^2

Pascals (Pa)

Question 3

What is the equation for density

Answer 3

Density=Mass/volume

Question 4

What is the units for density

Answer 4

Kg/m^3

Question 5

What is the equation for frequency

Answer 5

f=1/T

Question 6

Units for frequency and for period

Answer 6

f= MHz

T=us

Question 7

What is the equation for speed

Answer 7

Speed = distance/time

Question 8

What is the equation for wavelength

Answer 8

Wavelength =c/f

Question 9

What is the equation for propogation speed

Answer 9

Prop speed=. Square root (bulk modulus/density)

Question 10

Unit for prop speed

Answer 10

Mm/us or m/s

Question 11

What is the equation for pulse repetition frequency

Answer 11

PRF= 1/Pulse repetition period (PRP)

Question 12

What is the units of pulse repetition frequency

Answer 12

kHz

Question 13

What is the units for pulse repetition period

Answer 13

Ms

Question 14

What is the equation for Pulse duration

Answer 14

PD=T x n

Question 15

What is the unit for pulse duration

Answer 15

ms

Question 16

What is the equation for duty factor

Answer 16

DF=PD/PRP

Question 17

What is the unit for duty factor

Answer 17

% or decimal

Question 18

What is the equation for spatial pulse length

Answer 18

SPL= wavelength x n

Question 19

What is the unit of power

Answer 19

Milliwatt (mW)

Question 20

What is the unit for intensity?

Answer 20

.mW/cm^2

Question 21

What is the equation for intensity?

Answer 21

intensity = power /area

Question 22

What is the equation for intensity regarding just amplitude

Answer 22

Intensity = amplitude^2

Question 23

Operating frequency

Answer 23

Max f + min f)/2

Question 24

Fractional bandwidth

Answer 24

Bandwidth/ fo

Question 25

Quality factor

Answer 25

Fo/bandwidth

Question 26

Units for fractional bandwidth

Answer 26

% or .

Question 27

Equation from breakdown of attenuation

Answer 27

DB= adB + bdB +cdB

Question 28

Attenuation formula

Answer 28

.... a = ac x L

Question 29

Unit of attenuation

Answer 29

DB

Question 30

Unit of attenuation coefficient

Answer 30

....dB/cm

Question 31

Ac is = to

Answer 31

1/2 Operational frequency

Question 32

FOR THE HALF VALUE LAYER USE THE ____ EQUATION AND WHAT IS ALREADY KNOWN

Answer 32

Use the attenuation equation and attnuation is already known (3 dB)

Question 33

Ratio for finding HVL

Answer 33

15 db/1 cm =3dB/ x

Question 34

Intensity reflection coefficient

Answer 34

IRC= echo intensity/incident sound intensity x 100

Question 35

Unit of IRC

Answer 35

%

Question 36

What equalls 100%

Answer 36

Intensity reflection coefficient(IRC) + (intensity transmission coefficient (ITC)

Question 37

Equation for impedance

Answer 37

Z= density x speed

Question 38

Rayls =

Answer 38

Kg/m3 x m/s

Question 39

Net impedance

Answer 39

Delta z = z1-z2

Question 40

equation of IRC

Answer 40

IRC =[(z2-z1)/(z2+z1)]2

Question 41

Finding angle or speed of oblique incidence

Answer 41

C1/co1 = c2/co2

Question 42

Range with Round trip time

Answer 42

D=(0.5 x t) / c (in us/cm unit)

Question 43

Regular range

Answer 43

D = v x T