# Formula Symbols - B

Written by Jerry Ratzlaff on . Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

## Formula Symbols

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## B

SymbolGreek SymbolDefinitionUSMetricValue
$$BWR$$ - back work ratio - - -
$$Ba$$ - Bagnold number dimensionless dimensionless  -
$$Ba$$ - Barlow's formula $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$  -
$$b$$ - base - -  -
$$\Delta$$ Delta beam deflection, an increment $$in$$ $$mm$$  -
$$\Delta_{LL}$$ Delta beam deflection due to live load $$in$$ $$mm$$  -
$$\Delta_{TL}$$ Delta beam deflection due to total load $$in$$ $$mm$$  -
$$\Delta_{max}$$ Delta beam deflection maximum calculated $$in$$ $$mm$$  -
$$A_p$$ - bearing area $$in^2 \;or\; ft^2$$ $$mm^2 \;or\; m^2$$  -
$$Be$$ - Bejan number dimensionless dimensionless  -
$$b$$ - belt width $$in$$ $$mm$$  -
$$BA$$ - bend allowance $$in$$ $$mm$$
$$\theta$$ theta bend angle $$deg$$ $$rad$$ -
$$\sigma_b$$ sigma bending stress $$lb\;/\;in^2 \;or\; psi$$ $$Pa$$ -
$$Be$$ - Bernoulli's equation - -  -
$$Bm$$ - Bingham number dimensionless dimensionless  -
$$k_b$$ - binary rate coefficient - -  -
$$Bi$$ - Biot number dimensionless dimensionless  -
$$Bl$$, $$\;B$$ - Blake number dimensionless dimensionless  -
$$y$$ - bleed fraction - -  -
$$u_k$$ - Block wave function - -  -
$$Bo$$, $$\;Bd$$ - Bodenstein number dimensionless dimensionless  -
$$\mu_b$$ mu Bohr magneton constant constant $$9.274\; 010 \;0783\;x\; 10^{-24}\; J\;T^{-1}$$
$$a_o$$   Bohr radius constant constant $$5.291\; 772\; 109 \;03\;x\; 10^{-11}\; m$$
$$k$$, $$\;k_b$$ - Boltzmann constant constant constant $$1.38064852 \;x \;10^{-23}\; J\;K^{-1}$$
$$H$$ - Boltzmann function - -  -
$$Bo$$ - Bond number dimensionless dimensionless  -
$$\Delta E$$   Borda-Carnot equation $$lbf\;/\;ft^2$$ $$Pa$$  -
$$BORE$$ - bore $$in$$ $$mm$$  -
$$A$$ - bore factor $$in^2$$ -  -
$$\upsilon$$ upsilon Bragg angle - -  -
$$b$$ - brake dimension $$in$$ $$m$$  -
$$BHP$$, $$\;HP_b$$ - brake horsepower $$hp$$ -  -
$$BkW$$ - brake kilowatts - $$kW$$  -
$$t$$ - brake reaction time $$s$$ $$s$$ -
$$B_d$$ - braking distance $$ft$$ $$m$$ -
$$BFSC$$ - brake specific fuel consumption $$lbm \;/\; hp-hr$$ $$kg \;/\; kW-h$$  -
$$BWR$$ - brake work ratio - -  -
$$b$$ - breadth - -  -
$$BHN$$, $$\;HB$$ - Brinell hardness number - -  -
$$Br$$ - Brinkman number dimensionless dimensionless  -
- Brownell-Katz number dimensionless dimensionless  -
$$k_{cr}$$ - buckling coefficient dimensionless dimensionless -
$$Y$$ - bulk density $$lb/gal$$ $$g/mL$$ -
$$B$$, $$\;K$$ - bulk modules $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$  -
$$B$$, $$\;K$$ - bulk modules elasticity $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$  -
$$\theta$$ theta bulk strain - -  -
$$T_b$$, $$\;T_{\infty}$$ - bulk temperature $$^\circ F$$ $$C$$  -
$$B$$ - buoyancy $$lbf$$ $$N$$  -
$$B$$, $$\;F_b$$ - buoyancy force $$lbf$$ $$N$$  -
$$m_b$$ - buoyancy mass - -  -
$$b$$ - Burgers vector - -  -
$$p_b$$ - burst pressure $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$  -
$$BF$$ - bypass factor - -  -
Symbol Greek Symbol Definition US Metric Value

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