Formula Symbols - T
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Formula Symbols
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T
| Symbol | Greek Symbol | Definition | English | Metric | SI | Value |
|---|---|---|---|---|---|---|
| \(a_t\) | - | tangential acceleration | \(\large{\frac{ft}{sec^2}}\) | \(\large{\frac{m}{s^2}}\) | \(m - s^{-2}\) | - |
| \(F_t\) | - | tangential force | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(v_t\) | - | tangential velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(Ta\) | - | Taylor number | dimensionless | - | ||
| \(TS\) | - | tear strength | \(\large{\frac{lbf}{in}}\) | \(\large{\frac{kg}{mm}}\) | \(kg - mm^{-1}\) | - |
| \(T\) | - | temperature | \(F\) | \(C\) | \(x+273.15\;K\) | - |
| \(\alpha\), \(\;\beta\) | alpha, beta | temperature coefficient | \(F\) | \(C\) | \(x+273.15\;K\) | - |
| \(y\) | - | temperature derating factor | - | - | - | - |
| \(T_d\), \(\;\Delta T\), \(\;TD\) | Delta | temperature differential | \( F\) | \(C\) | \(x+273.15\;K\) | - |
| \(\nabla T\) | nabla | temperature gradient | - | - | - | - |
| \(T\) | - | temperature of an ideal gas | \( F\) | \(C\) | \(x+273.15\;K\) | - |
| \(\large{ \partial T }\) | partial | temperature rate of change | - | - | - | - |
| \(V_{temp}\) | - | temporary specific volume vatiable | \(\large{\frac{ft^3}{lbm}}\) | \(\large{\frac{m^3}{kg}}\) | \(m^3 - kg^{-1}\) | - |
| \(T_{sat}\) | - | temperature saturation point | \( F\) | \(C\) | \(x+273.15\;K\) | - |
| \(T\) | - | tensile force | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(s\) | - | tensile strength | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg-m^{-1}-s^{-2}\) | - |
| \( f_t \) | - | tensile strength of concrete | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg-m^{-1}-s^{-2}\) | - |
| \(\sigma\) | sigma | tensile stress | - | - | - | - |
| \(T\) | - | tension | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| - | - | tension (change in dimension) | - | - | - | - |
| \(\sigma\) | sigma | tension coefficient | - | - | - | - |
| \(F_t \) | - | tension force | - | - | - | - |
| \(v_t\) | - | terminal velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(C_t\) | - | thermal capacitance | \(\large{\frac{Btu}{F}}\) | \(\large{\frac{J}{K}}\) | \(J - K^{-1}\) | - |
| \(C\) | - | thermal conductance of air space | - | - | - | - |
| \(Q\) | - | thermal conduction | - | - | - | - |
| \(p\) | - | thermal conduction rate | - | - | - | - |
| \(K\), \(\;k\) | - | thermal conductivity | \(\large{\frac{Btu-ft}{hr-ft^2-F}}\) | \(\large{\frac{W}{m-K}}\) | \(W - m^{-1} -K^{-1}\) | - |
| \(\lambda\) | lambda | thermal conductivity coefficient | \(\large{\frac{Btu-ft}{hr-ft^2-F}}\) | \(\large{\frac{W}{m-K}}\) | \(W - m^{-1} -K^{-1}\) | - |
| \(k_t\) | - | thermal conductivity constant | \(\large{\frac{Btu-ft}{hr-ft^2-F}}\) | \(\large{\frac{W}{m-K}}\) | \(W - m^{-1} -K^{-1}\) | - |
| \(\lambda_{ik}\) | lambda | thermal conductivity tensor | - | - | - | - |
| \(h_c\) | - | thermal contact conductance coefficient | - | - | - | - |
| \(p\) | - | thermal current | - | - | - | - |
| \(D_{td}\) | - | thermal diffusion coefficient | - | - | - | - |
| \(\alpha_t\) | alpha | thermal diffusion factor | - | - | - | - |
| \(k_t\) | - | thermal diffusion ratio | dimensionless | - | ||
| \(\alpha\) | alpha | thermal diffusivity | \(\large{\frac{ft^2}{sec}}\) | \(\large{\frac{m^2}{s}}\) | \(m^2 - s^{-1}\) | - |
| \(T\), \(\;\eta_{th}\) | eta | thermal efficency | dimensionless | - | ||
| \(Q\) | - | thermal energy | \(Btu\) | \(\large{\frac{kg-m^2}{s^2}}\) | \(kg - m^2 - s^{-2}\) | - |
| \(\alpha\), \(\;\alpha_c\) | alpha | thermal expansion coefficient | \(\large{ \frac{in}{in-F} }\) | \(\large{ \frac{mm}{mm -C} }\) | \(mm - mm^{-1} -C^{-1}\) | - |
| - | - | thermal expansion of gases | - | - | - | - |
| - | - | thermal expansion of liquids | - | - | - | - |
| - | - | thermal expansion of solids | - | - | - | - |
| \(\alpha\) | alpha | thermal expansivity | - | - | - | - |
| \(l\) | - | thermal intensity | \(\large{\frac{Btu}{h-ft^2}}\) | \(\large{\frac{W}{m^2}}\) | \(W - m^{-2}\) | - |
| \(p\) | - | thermal power transfer | - | - | - | - |
| \(R\), \(\;R_t\) | - | thermal resistance | \(\large{\frac{hr-F}{Btu}}\) | \(\large{\frac{K}{W}}\) | \(K - W^{-1}\) | - |
| \(\epsilon_t\) | epsilon | thermal strain | - | - | - | - |
| \(\sigma_T\) | sigma | thermal stress | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg-m^{-1}-s^{-2}\) | - |
| \(\tau\) | tau | thermal time constant | \(sec\) | \(s\) | \(s\) | - |
| \(T\), \(\;\tau\) | tau | thermodynamic temperature | - | - | - | - |
| \(d\), \(\;t\), \(\;\delta\) | delta | thickness | \(ft\) or \(in\) | \(m\) or \(mm\) | \(m\) or \(mm\) | - |
| \(t_f\) | - | thickness of the flange of a steel beam cross-section | \(in\) | \(mm\) | \(mm\) | - |
| \(t_w\) | - | thickness of the web of a steel beam cross-section | \(in\) | \(mm\) | \(mm\) | - |
| \(\mu\) | mu | Thomson coefficient | - | - | - | - |
| \(\sigma_e\) | sigma | Thomson cross section | \(ft^2\) | \(m^2\) | \(m^2\) | \(6.652\;458\;7321\;(60)\;x\;10^{-29}\) \(m^2\) |
| \(d\) | - | throat depth of weld | \(in\) | \(mm\) | \(mm\) | - |
| \(T\) | - | throat size of a weld | \(in\) | \(mm\) | \(mm\) | - |
| \(F\) | - | thrust | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(F\) | - | thrust force | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \( t\) | - | time | \(sec\) | \(s\) | \(s\) | - |
| \(\tau\) | tau | time constant | \(sec\) | \(s\) | \(s\) | - |
| \(dt\), \(\;\Delta t\) | Delta | time differential | \(sec\) | \(s\) | \(s\) | - |
| \(t_f\) | - | time of flight | \(sec\) | \(s\) | \(s\) | - |
| \(\Delta t\) | Delta | time interval | \(sec\) | \(s\) | \(s\) | - |
| \(t_p\) | - | time of observation | \(sec\) | \(s\) | \(s\) | - |
| \(t_c\) | - | time of relaxation | \(sec\) | \(s\) | \(s\) | - |
| \(T\) | - | time scale | - | - | - | - |
| \(T\), \(\;\tau\) | tau | torque | \(lbf-ft\) | \(N-m\) | \(kg-m^2-s^{-2}\) | - |
| \(T_s\) | - | torque speed | \(\large{\frac{lbf-ft}{sec}}\) | \(\large{\frac{J}{s}}\) | \(J - s^{-1}\) | - |
| \(T\) | - | torsion (circle section) | \(lbf-ft\) | \(N-m\) | \(kg-m^2-s^{-2}\) | - |
| \(J\) | - | torsion constant for circle cross-section | \(\large{\frac{lbf-ft}{rad}}\) | \(\large{\frac{N-m}{rad}}\) | \(N - m - rad^{-1}\) | - |
| \(J\) | - | torsion constant for ellipse cross-section | \(\large{\frac{lbf-ft}{rad}}\) | \(\large{\frac{N-m}{rad}}\) | \(N - m - rad^{-1}\) | - |
| \(J\) | - | torsion constant for rectangle cross-section | \(\large{\frac{lbf-ft}{rad}}\) | \(\large{\frac{N-m}{rad}}\) | \(N - m - rad^{-1}\) | - |
| \(J\) | - | torsion constant for square cross-section | \(\large{\frac{lbf-ft}{rad}}\) | \(\large{\frac{N-m}{rad}}\) | \(N - m - rad^{-1}\) | - |
| \(K\) | Kappa | torsion coefficient | - | - | - | - |
| \(J\) | - | torsional constant | \(deg\) | \(rad\) | \(rad\) | - |
| \(K\) | - | tortional stiffness constant | - | - | - | - |
| \(v\) | - | Torricelli's law | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(k_r\) | - | torsional spring constant | \(\large{\frac{lbf-ft}{rad}}\) | \(\large{\frac{N-m}{rad}}\) | \(N - m - rad^{-1}\) | - |
| \(\tau\) | tau | tortuosity | dimensionless | - | ||
| \(n\) | - | total | - | - | - | - |
| \(J\), \(\;j_i\) | - | total angular momentum | \(\large{\frac{lbm-ft^2}{sec}}\) | \(\large{\frac{kg-m^2}{s}}\) | \(kg - m^2 - s^{-1}\) | - |
| \(\omega_t\) | omega | total angular velocity | \(\large{\frac{rad}{sec}}\) | \(\large{\frac{rad}{s}}\) | \(rad - s^{-1}\) | - |
| \(P\) | - | total concentrated load | \(lbm\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(h_d\) | - | total discharge head | \(ft\) | \(m\) | \(m\) | - |
| \(d_t\) | - | total displacement | \(ft\) or \(in\) | \(m\) or \(mm\) | \(m\) or \(mm\) | - |
| \(TDH\) | - | total dissolved head | \(ft\) | \(m\) | \(m\) | - |
| \(TDS\) | - | total dissolved solids | \(ppm\) | \(\large{\frac{mg}{L}}\) | \(mg - L^{-1}\) | - |
| \(Q_n\) | - | total energy | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| \(h_t\) | - | total head | \(ft\) | \(m\) | \(m\) | - |
| \(Q_t\) | - | total heat | \(Btu\) | \(kJ\) | \(kJ\) | - |
| \(Q\) | - | total heat transfer | \(\large{\frac{Btu}{hr}}\) | \(W\) | \(kg - m^2 - s^{-2} - A^{-1}\) | - |
| \(W\) | - | total load from a uniform distribution | \(lbm\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(m_t\) | - | total mass | \(lbm\) | \(kg\) | \(kg\) | - |
| \(p_t\) | - | total pressure | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(\eta_{tp}\) | eta | total pump efficency | dimensionless | - | ||
| \(V\) | - | total shear force | - | - | - | - |
| \(T_s\) | - | total stagnation temperature | \(F\) | \(C\) | \(x+273.15\;K\) | - |
| \(U\) | - | total strain energy | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| \(h_s\) | total suction head | \(ft\) | \(m\) | \(m\) | - | |
| \(T\) | - | total term | - | - | - | - |
| \(t_t\) | - | total time | \(sec\) | \(s\) | \(s\) | - |
| \(V_t\) | - | total velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(V_t\) | - | total volume of soil | \(ft^3\) | \(m^3\) | \(m^3\) | - |
| \(W_t\) | - | total weight of soil | \(lbf\) | \(N\) | \(kg-m-s^{-2}\) | - |
| \( W_t\) | - | total work | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| - | - | trajectory of a projectile | - | - | - | - |
| - | - | trajectory of a projectile on a hill | - | - | - | - |
| \(\dot {t}\) | - | transfer rate | - | - | - | - |
| \(TU\) | - | transfer units | - | - | - | - |
| \(KE_t\) | - | translational kinetic energy | - | - | - | - |
| \(\gamma\) | gamma | transmissivity | - | - | - | - |
| \(T\), \(\;\tau\) | tau | transmittance | dimensionless | - | ||
| \(T\) | - | transmitted torque | \(lbf-ft\) | \(N-m\) | \(kg-m^2-s^{-2}\) | - |
| \(\tau\) | tau | transmission coefficient | - | - | - | - |
| \(TL\) | - | transmission loss | \(dB\) | \(dB\) | \(dB\) | - |
| \(\Delta x\) | Delta | transverse displacement | - | - | - | - |
| \(\epsilon_t\) | epsilon | transverse strain (laterial strain) | \(ft\) | \(m\) | \(m\) | - |
| \(T\) | - | travel | \(in\) | \(mm\) | \(mm\) | - |
| \(\epsilon\) | epsilon | true strain | \(\large{\frac{in}{in}}\) | \(\large{\frac{mm}{mm}}\) | \(mm - mm^{-1}\) | - |
| \(\sigma\) | sigma | true stress | \(\large{\frac{lbf}{in^2}}\) | \(MPa\) | \(N - mm^{-2}\) | - |
| \(Pr_t\) | - | Turbulent Prandtl number | dimensionless | - | ||
| \(2D\) | - | two-dimension | - | - | - | - |
| Symbol | Greek Symbol | Definition | English | Metric | Value | |
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