The Steinhart-Hart equation with the squared term eliminated is the most common form of the equation that is used and is usually found explicit in temperature T:To determine the A,B,and C coefficients for a particular temperature range,the resistance of an NTC thermistor is measured,under zero...
To calculate theoretically valid surface free energies of the solid the actual contact angles should be used. Wenzel equation states the relationship between surface roughness and wettability The relationship between roughness and wettability was defined in 1936 by Wenzel who stated that adding surface ...
The simplified flow-rate equations have been found to be useful to calculate flow rates through any nozzle in an impactor. 展开 关键词: Ideal compressible gas flow Nozzle gas flow Cascade impactor, or through a single nozzle DOI: 10.1016/S0894-1777(01)00091-7 被引量: 9 ...
Due to the pressure drop across the nozzles preceding the critical nozzle (smallest area) in an impactor, the flow rate vs pressure ratio curve is shifted toward higher pressure ratios as compared to a single nozzle. An equation to calculate the flow rate of a viscous gas through any nozzle...
There are different equations that can be used to calculate resistance depending on the given quantities. In terms of Ohm's Law, resistance is expressed as R = V/I. If a problem involves the factors affecting the resistance of a conductor, R can be calculated using R = ρL/A. If it ...
On the basis of fluid mechanic principles, we hypothesized that we could objectively calculate upper airway resistance (RUA) using the polynomial equation. We manually measured RUA (mRUA) from the first linear portion of a pressure-flow loop in 544 breaths from 20 subjects and compared the m...
Search is the most efficient way to navigate the Engineering ToolBox! Colebrook Equation Sponsored Links The friction coefficients used when calculating resistance or pressure loss (or major loss) in ducts, tubes or pipes can be calculated with the Colebrook equation 1 / λ1/2= -2 log [ 2.51...
Think of Adam and Eve like an imaginary number, like the square root of minus one: you can never see any concrete proof that it exists, but if you include it in your equations, you can calculate all manner of things that couldn't be imagined without it. ...
... is fitted to the normal distribution,with the mean at 0 and variance of σ=1.342. ...符合均值为0,方差为1.342的正态分布。 Thus, if ... is given, ...is determined. 因此,如果给定...,...就也确定了。 For a given r, we can calculate ... ...
Schofield (1947) was among the first persons in soil science to apply the diffuse double-layer (DDL) theory to study the thickness of water films on mica surfaces. He used the theory to calculate negative adsorption of anions (exclusion of anions from the area adjacent to a negatively ...