Formula Symbols - B
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Formula Symbols
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B
| Symbol | Greek Symbol | Definition | English | Metric | SI | Value |
|---|---|---|---|---|---|---|
| \(Ba\) | - | Bagnold number | dimensionless | - | ||
| \(Ba\) | - | Barlow's formula | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(b\) | - | base | - | - | - | - |
| \(\Delta\) | Delta | beam deflection, an increment | \(in\) | \(mm\) | \(mm\) | - |
| \(\Delta_{LL}\) | Delta | beam deflection due to live load | \(in\) | \(mm\) | \(mm\) | - |
| \(\Delta_{TL}\) | Delta | beam deflection due to total load | \(in\) | \(mm\) | \(mm\) | - |
| \(\Delta_{max}\) | Delta | beam deflection maximum calculated | \(in\) | \(mm\) | \(mm\) | - |
| \(\tau\) | tau | beam shear stress | \(\large{\frac{lbf}{in^2}}\) | \(MPa\) | \(N - mm^{-2}\) | - |
| \(A_p\) | - | bearing area | \(in^2\) or \(ft^2\) | \(mm^2\) or \(m^2\) | \(mm^2\) or \(m^2\) | - |
| \(Be\) | - | Bejan number | dimensionless | - | ||
| \(b\) | - | belt width | \(in\) | \(mm\) | \(mm\) | - |
| \(BA\) | - | bend allowance | \(in\) | \(mm\) | \(mm\) | - |
| \(\theta\) | theta | bend angle | \(deg\) | \(rad\) | \(rad\) | - |
| \(BD\) | - | bend deduction | \(in\) | \(mm\) | \(mm\) | - |
| \(BM\) | - | bending momernt | \(\large{\frac{lbf}{sec}}\) | \(\large{\frac{kg-m}{s}}\) | \(kg - m - s^{-1}\) | - |
| \(\sigma_b\) | sigma | bending stress | \(\large{\frac{lbf}{in^2}}\) | \(MPa\) | \(N - mm^{-2}\) | - |
| \(Be\) | - | Bernoulli's equation | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) | \(kg - m^{-3}\) | - |
| \(Bm\) | - | Bingham number | dimensionless | - | ||
| \(k_b\) | - | binary rate coefficient | - | - | - | - |
| \(Bi\) | - | Biot number | dimensionless | - | ||
| \(Bl\), \(\;B\) | - | Blake number | dimensionless | - | ||
| \(u_k\) | - | block wave function | - | - | - | - |
| \(Bo\), \(\;Bd\) | - | Bodenstein number | dimensionless | - | ||
| \(\mu_b\) | mu | Bohr magneton | - | \(\large{ \frac{J}{T} }\) | \(J - T^{-1}\) | \(9.274\;009\;994\;(57)\;x\;10^{-24}\) \(\large{ \frac{J}{T} }\) |
| \(a_o\) | Bohr radius | \(ft\) | \(m\) | \(m\) | \(5.291\;772\;109 \;03\;x\;10^{-11}\) \(m\) | |
| \(k\), \(\;k_b\) | - | Boltzmann constant | \(\large{ \frac{lbm-ft^2}{sec^2} }\) | \(\large{ \frac{kJ}{mol-K} }\) | \(kJ - mol^{-1} - K^{-1}\) | \(1.380\;648\;52 \;x \;10^{-23}\) \(\large{ \frac{kJ}{mol-K} }\) |
| \(H\) | - | Boltzmann function | - | - | - | - |
| \(Bo\) | - | Bond number | dimensionless | - | ||
| \(\Delta E\) | Borda-Carnot equation | \(lbf-ft\) | \(J\) | \(kg - m^2 - s^{-2}\) | - | |
| \(BORE\) | - | bore | \(in\) | \(mm\) | \(mm\) | - |
| \(A\) | - | bore factor | - | - | - | |
| - | - | Boyles law | \(\large{\frac{lbf}{in^2}}\) | \(\large{\frac{N}{m^2}}\) | \(N - m^{-2}\) | - |
| \(\upsilon\) | upsilon | Bragg angle | - | - | - | - |
| \(b\) | - | brake dimension | \(in\) | \(mm\) | \(mm\) | - |
| \(BHP\), \(\;HP_b\) | - | brake horsepower | \(\large{\frac{lbf-ft}{sec}}\) | \(\large{\frac{J}{s}}\) | \(J - s^{-1}\) | - |
| \(BkW\) | - | brake kilowatts | - | - | - | - |
| \(B_r\) | - | brake reaction distance | \(ft\) | \(m\) | \(m\) | - |
| \(t\) | - | brake reaction time | \(sec\) | \(s\) | \(s\) | - |
| \(BSFC\) | - | brake specific fuel consumption | \(\large{\frac{lbm}{hp-hr}}\) | \(\large{\frac{kg}{kW-h}}\) | \(kg - kW^{-1} - h^{-1}\) | - |
| \(B_d\) | - | braking distance | \(ft\) | \(m\) | \(m\) | - |
| \(B_d\) | - | Braking distance on grade | \(ft\) | \(m\) | \(m\) | - |
| \(BHN\), \(\;HB\) | - | Brinell hardness number | \(\large{\frac{lbm}{in^2}}\) | \(\large{\frac{kg}{mm^2}}\) | \(kg - mm^{-2}\) | - |
| \(Br\) | - | Brinkman number | dimensionless | - | ||
| - | Brownell-Katz number | dimensionless | - | |||
| \(k_{cr}\) | - | buckling coefficient | dimensionless | - | ||
| \(Y\) | - | bulk density | \(\large{ \frac{lbm}{ft^3} }\) | \(\large{ \frac{kg}{m^3} }\) | \(kg - m^{-3}\) | - |
| \(B\), \(\;K\) | - | bulk modules | \(\large{\frac{lbm}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(B\), \(\;K\) | - | bulk modules elasticity | \(\large{\frac{lbm}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(\theta\) | theta | bulk strain | \(\large{\frac{in}{in}}\) | \(\large{\frac{mm}{mm}}\) | \(mm - mm^{-1}\) | - |
| \(T_b\), \(\;T_{\infty}\) | - | bulk temperature | \( F\) | \(C\) | \(x+273.15\;K\) | - |
| \( \gamma ' \) | gamma | bulk unit weight | \(\large{ \frac{lbm}{ft^3} }\) | \(\large{ \frac{N}{m^3} }\) | \(N - m^{-3}\) | - |
| \(B\) | - | buoyancy | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(B\), \(\;F_b\) | - | buoyancy force | \(lbf\) | \(N\) | \(kg - m - s^{-2}\) | - |
| \(m_b\) | - | buoyancy mass | \(lbm\) | \(kg\) | \(kg\) | - |
| \(\gamma '\) | gamma | buoyant unit weight | \(\large{ \frac{lbm}{ft^3} }\) | \(\large{ \frac{N}{m^3} }\) | \(N- m^{-3}\) | - |
| \(b\) | - | Burgers vector | - | - | - | - |
| \(p_b\) | - | burst pressure | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) | \(kg- m^{-1}-s^{-2}\) | - |
| \(\sigma_{avg}\) | sigma | buttweld under axial and transverse loading | \(\large{\frac{lbf}{in^2}}\) | \(MPa\) | \(N - mm^{-2}\) | - |
| \(BF\) | - | bypass factor | - | - | - | - |
| Symbol | Greek Symbol | Definition | English | Metric | Value | |
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