Skip to main content

Formula Symbols - A

Mathematics and Management Rules and Symbols

"A" Formula Symbols

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

SymbolGreek SymbolDefinitionEnglishMetricSIValue
Vd - Abbe number dimensionless dimensionless dimensionless  -
T   absolute dry bulb temperature - K K -
AH - absolute humidity lbmft3 gm3 g−m−3  -
pa - absolute pressure lbfin2 Pa kg−m−1−s−2  -
ϵ epsilon absolute roughness in mm mm  -
Ta - absolute temperature F C x+273.15K  -
Rt - absolute thermal resistance - - - -
μ mu absolute viscosity lbf−secft2 Pa−s kg−m−1−s−1  -
α alpha absorptance - - -  -
α alpha absorptivity - - -  -
a - acceleration ftsec2 ms2 m−s−2  -
a - acceleration from force ftsec2 ms2 m−s−2  -
g   acceleration of free fall ftsec2 ms2 m−s−2 -
g - acceleration of gravity ftsec2 ms2 m−s−2  9.80665 ms2
ω omega acentric factor dimensionless dimensionless dimensionless -
acfm - ACFM ft3min m3min m3−min−1 -
γ gamma activity coefficient dimensionless dimensionless dimensionless  -
Ea - activation energy lbf−ft J kg−m2−s−2  -
ACFM - actual flow rate ft3sec m3s m3−s−1   -
e - actual vapor pressure lbfin2 Pa kg−m−1−s−2  -
l - acoustic path length between tranducer faces ft m m  -
p - acoustic pressure  lbf−secft2 Pa kg−m−1−s−1  -
td - accustic signal downstream travel time sec s s  -
tu - accustic signal downstream travel time sec s s  -
- - adjusts for the volume occupied by the gas particles in3 mm3 mm3 -
Na - aeration number dimensionless dimensionless dimensionless  -
A - affinity - - -  -
t - age of concrete days days  days -
to - age of concrete at loading days days days -
tc   age of concrete when drying starts at end of moist curing days days days -
a - aggregate content of concrete lbmyd3 kgm3 kg−m−3 -
A - air lbfin2 Pa kg−m−1−s−2 -
α alpha air content expressed as percentage dimensionless dimensionless dimensionless -
ACR - air consumption rate ft3min m3min m3−min−1  -
A - air content dimensionless dimensionless dimensionless -
CFM, Qa - air flow rate ft3sec m3s m3−s−1  -
Qa - air flow rate through piping ft3sec m3s m3−s−1  -
AFR - air-fuel ratio dimensionless dimensionless dimensionless  -
AHP - air horsepower lbf−ftsec Js J−s−1  -
Ti - air inlet temperature F C x+273.15K  -
ma - air mixture lbm kg kg  -
To - air outlet temperature  F C x+273.15K  -
d - air pipe sizing in mm mm -
p - air pressure lbfin2 Pa kg−m−1−s−2 -
pl - air pressure loss through piping lbfin2 Pa kg−m−1−s−2  -
Fa - air resistance lbf N kg−m−s−2 -
Fa - air resistance of drag lbf N kg−m−s−2  -
Fa - air resistance force lbf N kg−m−s−2  -
ca - air specific heat Btulbm−F kJkg−K kJ−kg−1−K−1   -
γa gamma air specific weight lbfft3 Nm3  N−m−3   -
va - air velocity ftsec ms m−s−1 -
va - air velocity through piping ftsec ms  m−s−1 -
s - AGMA stress number - - -  -
Al - Alfven number dimensionless dimensionless dimensionless  -
va - Alfven speed ftsec ms  m−s−1  -
A - algebric difference in grade dimensionless dimensionless dimensionless -
Fa - allowable axial stress lbfin2 Pa kg−m−1−s−2  -
Fb - allowable bending stress lbfin2 Pa kg−m−1−s−2  -
Fc - allowable compressive stress lbfin2 Pa kg−m−1−s−2  -
Pa - allowable load lbf N kg−m−s−2 -
Fv - allowable shear stress lbfin2 Pa kg−m−1−s−2  -
S - allowable stress lbfin2 Pa kg−m−1−s−2  -
ASD - allowable stress design lbfin2 Pa kg−m−1−s−2 -
Sa - allowable stress range lbfin2 Pa kg−m−1−s−2 -
Ft - allowable tensile stress lbfin2 Pa kg−m−1−s−2  -
A - allowance - - -  -
ma - alpha particle mass lbm kg kg 6.644657230(82)x10−27 kg
AC - alternating current I Cs C−s−1  -
Vmixture - Amagat's law ft3 m3 m3  -
Ta - ambient temperature F C x+273.15K  -
n - amount of substance - - -  -
A - amp I Cs C−s−1  -
A - ampere I Cs C−s−1  -
A - amplitude in mm  mm  -
Al - amplitude (longitudinal) in mm mm -
AR - amplitude ratio - - -  -
β beta Andrade's beta - - -  -
θ, ϕ theta, phi angular deflection deg rad rad -
ω omega angular frequency degsec rads rad−s−1 -
A, B, C - Antoine constant - - -  -
- - Antoine equation lbfin2 kgm−s2  kg−m−1−s−2 -
A, θ, deg theta angle deg rad rad   -
ϕ phi angle deg rad rad   -
θ theta angle between a perpendicular vector to the area and the magnertic field deg rad rad  -
θ theta angle between acoustic path and the pipe's longitudinal axis deg rad rad   -
ΔA delta angle differential deg rad rad   -
Imp - angle impulse lbf−ft−sec N−m−s N−m−s  -
θ theta angular rotation degsec rads  rad−s−1  -
γ gamma angle of twist deg rad rad   -
α alpha angular acceleration degsec2 rads2  rad−s−2  -
θ theta angular deflection in mm mm  -
θ theta angular displacement deg rad rad  -
ω omega angular frequency degsec rads  rad−s−1  -
H - angular impulse  lbm−ft2sec  kg−m2s kg−m2−s−1  -
L - angular momentum  lbm−ft2sec  kg−m2s kg−m2−s−1  -
L - angular momentum of an object with linear momentum  lbm−ft2sec  kg−m2s  kg−m2−s−1 -
- - angular Planck constant  lbf−ftsec J−s kg−m2−s−1 1.054571726(47)x10−34 J−s
θ theta angular position deg rad rad  -
ω0 omega angular resonant frequency 1sec 1s 1−s−1 -
θ theta angular rotation degsec rads rad−s−1  -
ω omega angular speed degsec rads rad−s−1  -
ω, va omega angular velocity degsec rads  rad−s−1  -
dω, Δω omega angular velocity differential degsec rads rad−s−1  -
ω omega angular velovity of a rolling sphere degsec rads rad−s−1 -
k - angular wavenumber radft radm rad−m−1  -
k - angular wave vector - - -  -
APIgravity   API gravity F C x+273.15K -
a - apothem in or ft mm or m mm or m  -
P - applied concentrated load lbf N kg−m−s−2 -
w - applied distributed load lbf N kg−m−s−2 -
Fa - applied force lbf N kg−m−s−2  -
R - applied stress lbfin2 Pa kg−m−1−s−2 -
Ar - Archimedes number dimensionless dimensionless dimensionless  -
B - Archimede's principle lbf N kg−m−s−2  -
E, V - arc voltage V V kg−m2−s−3−A−1 -
⌢l, la - arc length in or ft mm or m  mm or m -
A, S - area in2 or ft2 mm2 or m2 mm2 or m2  -
A, \;A_c - area cross-section in^2 or ft^2 mm^2 or m^2 mm^2 or m^2 -
A_{throat} - area cross the throat of a weld in^2 or ft^2 mm^2 or m^2 mm^2 or m^2  -
A_d - area differential in^2 or ft^2 mm^2 or m^2 mm^2 or m^2  -
f_a - area gradient - - -  -
\Delta A  - area thermal expansion in^2 mm^2 mm^2   -
\alpha_a alpha area thermal expansion coefficient \large{ \frac{in^2}{in^2\;F} } \large{ \frac{mm^2}{mm^2-C} } mm^2-mm^{-2}-C^{-1}  -
Ar - Arrhenius number dimensionless dimensionless dimensionless  -
k - Arrhenius equation - \large{ \frac{mol}{L-s} } mol- L^{-1}-s^{-1} -
\rho rho atmosphere density \large{\frac{lbm}{ft^3}} \large{\frac{kg}{m^3}} kg-m^{-3}  -
p_a, \;p_{atm} - atmospheric pressure \large{\frac{lbf}{in^2}} Pa kg- m^{-1}-s^{-2}  -
m_a - atomic mass - - -  -
m_u - atomic mass constant lbm kg kg 1.660\;539\;066\;60\;(50)\;x\;10^{-27} kg
u - atomic mass unit lbm kg kg  -
Z - atomic number dimensionless dimensionless dimensionless  -
N - atomic number density - \large{\frac{atoms}{cm^2}} atoms-cm^{-2} -
A - atomic weight - - -  -
p_a - atmospheric pressure \large{\frac{lbf}{in^2}} Pa kg- m^{-1}-s^{-2} -
p_a - atmospheric pressure of moist air \large{\frac{lbf}{in^2}} Pa kg- m^{-1}-s^{-2} -
T_a - atmospheric temperature F C x+273.15\;K -
A - Atwood number dimensionless dimensionless dimensionless  -
Nv - Avagadro's number moles moles moles  -
\Phi Phi availability function - - -  -
\bar {a}, \;a_a - average acceleration \large{\frac{ft}{sec^2}} \large{\frac{m}{s^2}}  m - s^{-2}   -
\bar {\alpha} alpha average angular acceleration \large{\frac{deg}{sec^2}} \large{\frac{rad}{s^2}}  rad - s^{-2}   -
v_a, \;\bar{\omega} omega average angular velocity \large{\frac{ft}{sec}} \large{\frac{m}{s}} m - s^{-1}  -
v_a, \;\bar{\omega} omega average angular velocity change in velocity \large{\frac{ft}{sec}} \large{\frac{m}{s}}  m - s^{-1} -
\bar {F}, \;F_a - average force lbf N kg - m - s^{-2}  -
mw - average mole rate - - - -
\bar {u}, \;v_a - average speed \large{\frac{ft}{sec}} \large{\frac{m}{s}} m - s^{-1}  -
\sigma_{avg} sigma average stress of weld \large{\frac{lbf}{in^2}} Pa kg- m^{-1}-s^{-2} -
\bar {v}, \;v_a - average velocity \large{\frac{ft}{sec}} \large{\frac{m}{s}} m - s^{-1}  -
\bar{v} - average velocity change in velocity \large{\frac{ft}{sec}} \large{\frac{m}{s}}  m - s^{-1} -
v_a - average axial velocity of water flow \large{\frac{ft}{sec}} \large{\frac{m}{s}}  m - s^{-1}  -
- - Avogadro's law mol mol mol  -
L, \;N_a - Avogadro constant \large{\frac{count}{mol}} \large{\frac{count}{mol}}  count - mol^{-1}  6.022\;141\;29\;(27) \;x\; 10^{23} \large{\frac{count}{mol}}
D_a - axial diffusivity - - -  -
P - axial force lbf N kg - m - s^{-2}  -
P - axial load lbf N kg - m - s^{-2} -
k - axial stiffness lbf N kg - m - s^{-2} -
F - axial thrust lbf N kg - m - s^{-2} -
\epsilon_a, \;\epsilon epsilon axial strain (longitudinal strain) \large{\frac{in}{in}} \large{\frac{mm}{mm}}  mm - mm^{-1}   -
Symbol Greek Symbol Definition English Metric SI  Value

 

Piping Designer Logo Slide 1

 

Similar Articles

MOD_TAGS_SIMILAR_NO_MATCHING_TAGS