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"W" Formula SymbolsA - 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 | ||||||
|---|---|---|---|---|---|---|
| Symbol | Greek Symbol | Definition | English | Metric | SI | Value |
| \(\frac{m_w}{m_z}\) | - | W-to-Z mass ratio | dimensionless constant | dimensionless constant | dimensionless constant | \(0.881\;53\;(17)\) |
| \(W\) | - | Wahl correction factor | dimensionless | dimensionless | dimensionless | - |
| \(f\) | - | Wallis parameter | dimensionless | dimensionless | dimensionless | - |
| \(w\) | - | water content | dimensionless | dimensionless | dimensionless | - |
| \(\rho_w\) | rho | water density by temperature | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) | \(kg - m^{-3}\) | - |
| \(Q_w\) | - | water flow rate | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) | \(m^3 - s^{-1}\) | - |
| \(q\) | - | water flow rate increment | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) | \(m^3 - s^{-1}\) | - |
| \(Q_w\) | - | water flow rate through a valve | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) | \(m^3 - s^{-1}\) | - |
| \(Q_w\) | - | water flow rate through an orfice | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) | \(m^3 - s^{-1}\) | - |
| \(Q_w\) | - | water flow rate through piping | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) | \(m^3 - s^{-1}\) | - |
| \(v\) | - | water hammer flow velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(\Delta v\) | - | water hammer fluid velocity change | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(g\) | - | water hammer gravitational acceleration | \(\large{\frac{ft}{sec^2}}\) | \(\large{\frac{m}{s^2}}\) | \(m - s^{-2}\) | - |
| \(p\) | - | water hammer inlet pressure | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(p_{spf}\) | - | water hammer maximum surge pressure for fluid | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(p_{spw}\) | - | water hammer maximum surge pressure for water | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| - | - | water hammer maximum surge pressure head | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(p_{inc}\) | - | water hammer pressure increase | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(\alpha\) | alpha | water hammer pressure wave velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(\gamma_f\) | gamma | water hammer unit weight of fluid | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{N}{m^3}}\) | \(N - m^{-3}\) | - |
| \(l\) | - | water hammer upstream pipe length | \(ft\) | \(m\) | \(m\) | - |
| \(t\) | - | water hammer valve closing time | \(sec\) | \(s\) | \(s\) | - |
| \(WHP\), \(HP_w\) | - | water horsepower | \(\large{\frac{lbf-ft}{sec}}\) | \(\large{\frac{J}{s}}\) | \(J - s^{-1}\) | - |
| \(WkW\) | - | water kilowatts | - | - | - | - |
| \(d\) | - | water pipe sizing | \(in\) | \(mm\) | \(mm\) | - |
| \(p_i\) | - | water pressure loss through piping | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(WS\) | - | water surface | - | - | - | - |
| \(p\) | - | water vapor pressure | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(v_w\) | - | water velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(v_w\) | - | water velocity through piping | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(P\) | - | watt (electric) | \(\large{\frac{lbf-ft}{sec}}\) | \(W\) | \(kg-m^2-s^{-3}\) | - |
| \(H\) | - | wave height | \(in\) | \(mm\) | \(mm\) | - |
| \(\lambda\) | lambda | wavelength | \(in\) | \(mm\) | \(mm\) | - |
| \(\lambda_l\) | lambda | wavelength (longitudinal) | \(ft\) | \(m\) | \(m\) | - |
| \(v_w\) | - | wavelength velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(\Psi\) | Psi | wave function | - | - | - | - |
| \(\sigma^1\) | sigma | wave number | - | - | - | - |
| \(\sigma\) | sigma | wave vector | - | - | - | - |
| \(\lambda\) | lambda | wave velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) | \(m - s^{-1}\) | - |
| \(A_{web}\) | - | web area in a steel beam equal to the depth x web thickness | \(ft^2\) or \(in^2\) | \(m^2\) or \(mm^2\) | \(m^2\) or \(mm^2\) | - |
| \(t_w\) | - | web thickness | \(in\) | \(mm\) | \(mm\) | - |
| \(We\) | - | Weber number | dimensionless | dimensionless | dimensionless | - |
| \(G\), \(\;P\), \(\;W\) | - | weight | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(W_{\rho}\) | rho | weight density | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) | \(kg - m^{-3}\) | - |
| \(W_a\) | - | weight of air | - | - | - | - |
| \(W_b\) | - | weight of body | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(W_{rho}\) | rho | weight density | \(\large{\frac{lbf-in}{ft^3}}\) | \(\large{\frac{kg-mm}{m^3}}\) | \(kg - mm - m^{-3}\) | - |
| \(\gamma\) | gamma | weight of fluid | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(W\) | - | weight force | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(W_{im}\) | - | weight of immersed body | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(W_s\) | - | weight of soil | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(W_s\) | - | weight of solid | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(W_w\) | - | weight of water | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(\theta_w\) | theda | Weinberg angle | dimensionless constant | dimensionless constant | dimensionless constant | \(0.22290\) |
| \(Wi\) | - | Weissenberg number | dimensionless | dimensionless | dimensionless | - |
| \(A\) | - | weld current | - | - | - | - |
| \(W\) | - | weld size | \(in\) | \(mm\) | \(mm\) | - |
| \(s\) | - | weld speed | \(\large{\frac{in}{min}}\) | \(\large{\frac{mm}{min}}\) | \(mm - min^{-1}\) | - |
| \(A_{throat}\) | - | weld, area cross the throat of the weld | \(ft^2\) or \(in^2\) | \(m^2\) or \(mm^2\) | \(m^2\) or \(mm^2\) | - |
| \(\rho_{wb}\) | rho | wet bulk density of soil | \(\large{ \frac{lbm}{ft^3} }\) | \(\large{ \frac{kg}{m^3} }\) | \(kg - m^{-3}\) | - |
| \(P_w\) | - | wetted perimeter | \(ft\) | \(m\) | \(m\) | - |
| \(\zeta\) | zeta | wet steam dryness fraction | dimensionless | dimensionless | dimensionless | - |
| \(h_t\) | - | wet steam enthalpy | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| \(C_v\) | - | wet steam flow coefficient | dimensionless | dimensionless | dimensionless | - |
| \(\upsilon\) | upsilon | wet steam specific volume | \(\large{\frac{ft^3}{lbm}}\) | \(\large{\frac{m^3}{kg}}\) | \(m^3 - kg^{-1}\) | - |
| \(M\) | - | whole number | - | - | - | - |
| \(w\) | - | width | \(ft\) | \(m\) | \(m\) | - |
| \(b\) | width, often cross-section | \(ft\) or \(in\) | \(m\) or \(mm\) | \(m\) or \(mm\) | - | |
| \(b_f\) | - | width of the flange of a steel beam cross-section | \(in\) | \(mm\) | \(mm\) | - |
| \(T_{wc}\) | - | wind chill factor | dimensionless | dimensionless | dimensionless | - |
| \(E\) | - | wind energy | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| \(\alpha\) | alpha | Womersley number | dimensionless | dimensionless | dimensionless | - |
| \(W\) | - | work | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| \(W\) | - | work done by gas | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| \(W\) | - | work done on a system | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| \(W\) | - | work-energy theorem | \(\large{ \frac{ft^3}{sec} }\) | \(\large{ \frac{m^3}{s} }\) | \(m^3 - s^{-1}\) | - |
| \(\phi\) | phi | work function | - | - | - | - |
| \(W\) | - | work per unit mass | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - |
| Symbol | Greek Symbol | Definition | English | Metric | SI | Value |
