Basic Math, Physical Quantities, SI Units, Atoms, and Matter
SOLVE FOR:
EQUATION
KEY
Body Mass Index
BMI = weight/height
Bmi = body mass index
Weight = kg
Height = m^2
Half-Life
t ½ = In2 / ke
t ½ = half-life
In 2 = 0.693
ke = elimination constant
Force
F=mxa
F = force
m= mass
a=acceleration
Weight
w= m x g
w=weight
m=mass
g= acceleration due to gravity
(9.81)
Pressure Difference of
Sphere
ΔP = (2 x Tsph) / R
ΔP = pressure difference of
sphere
Tsph = surface tension
R = radius
Pressure Difference of a
Cylinader
ΔP = Tcyl / R
ΔP = pressure difference of
cylinader
Tcyl = surface tension
R = radius
Arterial and Capillary Wall
Tension
T=PxR
T = tension
P = internal pressure
R = radius
Energy, Power, Temperature, and Heat
SOLVE FOR:
EQUATION
KEY
Work
W=Fxd
W = work
F = force
d= distance
Power
P = W/T
P = power
W = work
T = time
Pressure
P = F/A
P = pressure
F = force
A = area
Compliance
C = ΔV / ΔP
C = compliance
ΔV = change in volume
ΔP = change in pressure
Heat
Q = mcΔT
Q = heat
m= mass
c= specific heat capacity
ΔT = change in temperature
Specific Heat Capacity
c = ΔE / mΔT
c= specific heat capacity
ΔE = energy required
m=mass
ΔT = change in temperature
Stored Energy
ΔU = Q - W
ΔU = stored energy
Q = heat
W = wok
Entropy
ΔS = ΔQ / T
ΔS = change in entropy
ΔQ = heat entering the system
T = temperature
Waves
SOLVE FOR
EQUATION
KEY
Frequency
f = 1/T
f = frequency (hz)
T = time (sec)
Velocity of Wave
v =fxλ
v = velocity
f = frequency (hz)
λ = wavelength
Energy of a Photon
E = hv
E = energy of a photon
h= 6.6x10^-34
f= frequency (hz)
Intensity
I = P / 4𝝅r^2
I = intensity
P = radiant flux
r = distance from the source
SOLVE FOR
EQUATION
KEY
Pressure
P = F/A
P = pressure
F = force
A = area
Liquid Pressure
P=pxgxh
P = pressure
p = liquid density
g = acceleration due to
gravity (9.81)
h = height
Mean Arterial Pressure
MAP = {(2xDBP) + SBP} / 3
MAP = mean arterial pressure
DBP = diastolic blood
pressure
SBP = systolic blood pressure
Pressure Measurements
Humidity
SOLVE FOR
EQUATION
KEY
Relative Humidity
RH = (AVD / SVD) x 100%
RH = relative humidity
AVD = actual vapor density
SVD = saturation vapor density
Measurement of Gas Flow
SOLVE FOR
EQUATION
KEY
Flow
Q = V/T
Q = flow
V = change in volume
T = time interval over which flow is
measured
Conservation of Flow
A1 x V1 = A2 x V2
A = cross sectional area (cm^2)
V = velocity of fluid at each point
Laminar Flow
Q = ΔP/R
Q = flow
ΔP = driving pressure
R = flow resistance
Resistance
R = 8uL/ 𝜋r^4
L = length of the tube
u = dynamic viscosity
r = radius of tube
Reynolds Number
Re = (2rvp) / u
r = radius
v = velocity
p= fluid density
u= viscosity
Re = inertia forces / viscous
forces