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Thermal Management Design and Analysis Services  (135 companies)Thermal management design and analysis services perform tests and redesigns around thermal dissipation issues. Search by Specification  Learn More

No Image AvailableDifferentials and Axles  (34 companies)A differential is a mechanical connection that translates rotational motion from a source to two axles. The driveshaft generally runs the length of the vehicle, from the energy input (a motor) to the energy output (the wheels). The axle of the driving wheels is split, with the driveshaft transferring motion through gearing arrangements to maintain a uniform direction and speed of the (live) axles. This arrangement is very common in rearwheel drive cars and trucks, but is also employed in aircraft, production machinery and equipment, trains, and ships. Learn More

Venturi Vacuum Generators  (76 companies)...and surface mounting. For all types of workholding, the hold down force required for a part can be calculated by the following equation: F = Apart x Pvac. where F is the holding force, Apart is the area of the part being held in sq. inches (in2), and Pvac... Search by Specification  Learn More

Thermistor Temperature Probes  (132 companies)Thermistor temperature probes sense temperature by using thermistors, devices made of semiconductor materials which exhibit a large change in resistance for a small change in temperature. Search by Specification  Learn More

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Product News for Cottrell Equation

Uson, L.P.
Optima vT Makes Leak Testing Math Easy or Output of the equation can be sent to a math register, step comp value, step cal value or to the step result. Limits can be applied to the output using Advanced Limits (The Advanced Limits capability is not included in the base unit. It is a purchase option if the application requires it). The builtin equations are listed below. Sum or Average: X= (A + B + C + D)E. Linear: X= (AB+ C+D)E. Quadratic: X= (ABB + CB+ D)E. Sum of Prod: X= (AB + CD) E. Slope: X= ((AB)/(CD))E. Moving... (read more)Browse Leak Testing Equipment Datasheets for Uson, L.P. 
Uson, L.P.
Optima vT Leak Tester from Uson Makes Math Easy come from step result sensor measurements, math registers, step comp value or step cal value. The product or Output of the equation can be sent to a math register, step comp value, step cal value or to the step result. Limits can be applied to the output using Advanced Limits (The Advanced Limits capability is not included in the base unit. It is a purchase option if the application requires it). The builtin equations are listed below. Sum or Average: X= (A + B + C + D)E. Linear: X= (AB+ C+D)E... (read more) 
MICROMO
Explore the MICROMO MOTION App Today Explore the MICROMO MOTION App Today. Are you ready to try MICROMO ’s new MOTION app, a DC motor calculator app for use with both iPhone and Android devices? MOTION is designed to help engineers calculate DC motor performance data by providing speed, torque, voltage and other catalog data. The app will also facilitate easy connection between customers and FAULHABER Group products by integrating a contact form (available on the MICROMO website). MOTION Equation Calculator. Users... (read more)Browse DC Motors Datasheets for MICROMO 
IHS ESDU
Stability of any system that can be modelled ESDU Dynamic. The treatment of stability, response and controllability of any system that can be modelled, for some part of its motion, by linear constant coefficient differential equations. ESDU Dynamics is a treatment of the behaviour and motion of a system and the resulting stability and controllability of that system, particularly under nonsteady conditions where the dynamic nature of the system plays an important part in determining its behaviour. There are a couple of sections within... (read more)Browse Standards and Technical Documents Datasheets for IHS ESDU 
Epoxy Technology
Tech Tip 13  Surface Preparation In adhesive bonding the epoxy is only one part of the equation. Each substrate that is being adhered to is often as important as the adhesive selection. Physical properties such as bond strength, conductivity, and bond reliability all hinge on the interface between substrate and adhesive. The adhesivesubstrate interface is a sensitive equilibrium that can be upset by even the slightest contaminants. In preparing a surface for adhesive bonding users can increase reliability and productivity... (read more)Browse Epoxy Adhesives Datasheets for Epoxy Technology 
Ametek Solartron Metrology
SI 5500 mathematical formulae and Algebraic Equations to get wide variety of results for their gauging applications. ... (read more)Browse Dimensional Gages and Instruments Datasheets for Ametek Solartron Metrology 
Advanced Abrasives Corp.
ParticleSize Measurement for Superabrasives Advanced Abrasives incorporates many different techniques and instruments to measure the distributions characteristics. This will insure consistent products from lot to lot leaving the guess work and variability out of the equation for the end user. InstrumentMeasurement Technique Horiba  LA 910Laser light scattering Coulter  Multisizer 3Electric sensing zone Microtrac  S3000 / X100Laser light scattering CPSCentripetal force and laser Image Pro  Image AnalysisMicroscopy (read more)Browse Diamond Powders and Superabrasive Grains Datasheets for Advanced Abrasives Corp. 
Strainsert
Instrumented Clevis Pins for Sheave Applications line tension by monitoring reaction load on the pin. Using the equations provided below, the line tension can be determined. Constant Wrap Angle. For a sheave with a constant wrap angle, the resultant load can be oriented in relation to a single force sensing axis and the following equations apply. *Axis of Maximum Sensitivity: Align Keeper Flat of Load Sensing Pin perpendicular to Axis of Maximum Sensitivity which is at one half the wrap angle. For this example, wrap angle = 105 degrees and Ø/2... (read more) 
IHS ESDU
Reliable Data Sources for Key Industrial Chemicals The ESDU Physical Data, Chemical Engineering Series provides the most reliable correlated data available for the physical properties of a wide range of pure compounds, and some mixtures, used in a wide range of industries from petrochemical to aerospace. The data, which are provided as equations and in tabular form, are based on the most reliable experimental data, both reported and unreported. Within compound groups, data are extrapolated beyond experimental temperature ranges in a consistent... (read more)Browse Standards and Technical Documents Datasheets for IHS ESDU 
Buckeye Machine Fabricators, Inc.
Finite Element Analysis by breaking down a real object into a larger number (thousands to hundreds of thousands) of finite elements, such as little cubes. Mathematical equations help predict the behavior of each element. A computer then adds up all the individual behaviors to predict the behavior of the actual object. Finite element analysis helps predict the behavior of products affected by many physical effects, including: Mechanical stress. Mechanical vibration. Fatigue. Motion. Contact Buckeye Machine... (read more)
More Information on: Cottrell Equation

Bio/CMOS Interfaces and CoDesign
Cottrell Equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrochemical Dictionary
current flows at any time after application of the potential step will obey the Cottrell equation [i–iv].

Electrochemistry of Insertion Materials for Hydrogen and Lithium
By converting the Nyquist plot into the time domain, the Warburg impedance including the common factor oÀ1/2 becomes simplified to the Cottrell equation including .

Electrochemical Dictionary
Cottrell equation [i–iv].

Electrochemical Effect of Different Modified Glassy Carbon Electrodes on the Values of Diffusion Coefficient for Some Heavy Metal Ions
...the modified film electrodes, demonstrated in the application study for different heavy metal ions such as Hg2+ , Cd2+ , and Mn2+ . Cyclic . voltammetric effect by chronoamperometry (CA) technique was investigated to determination the diffusion coefficient (Df) values from Cottrell equation at these ions.

Electroanalytical Methods
which is called the Cottrell equation .

Modern Aspects of Electrochemistry
In the case of a fractal electrode, the relationship between the current and the time follows generalized Cottrell equation derived .

Digital Simulation in Electrochemistry
the Cottrell equation .

The kinetics of lithium transport through a composite electrode made of mesocarbonmicrobeads heattreated at 800 °C investigated by current transient analysis
In this work we call Eq. 1 the modified Cottrell equation .

https://openaccess.leidenuniv.nl/bitstream/handle/1887/20221/Yanson_thesis.pdf?sequence=18
Substituting Eq. 1.5 into Eq. 1.2 and taking into account the Faraday law of electrolysis1, we obtain the following relationship for the electrochemical current density i(t), which is known as the Cottrell equation : .

https://tspace.library.utoronto.ca/bitstream/1807/25556/5/Dounin_Vladimir_V_201011_MSc_thesis.pdf
C(x,t) is the concentration added to negate flux due to a potential gradient and the sample solution is not stirred during After addressing the diffusional flux, current can eventually be expressed through the Cottrell equation (given here for a planar .

http://dspace.mit.edu/bitstream/handle/1721.1/42286/232156788.pdf?sequence=1
This change in diffusion regime leads to a decrease ofthe current with time according to the Cottrell equation (Equation (5.42)).

Effect of electrolyte cations on the charge transfer in films of prussian blue
In the basic time interval 210 s, expetimen, tal data satisfactorily obey a linear dependence in the I vs. r ~ coordinates that correspond to the Cottrell equation (Fig. 3b).

Kinetics of mixedcontrolled oxygen reduction at nafionimpregnated Ptalloydispersed carbon electrode by analysis of cathodic current transients
Experimentally measured Calculated by the ButlerVolmer equation Calculated by the Cottrell equation .

A review of anomalous diffusion phenomena at fractal interface for diffusioncontrolled and nondiffusioncontrolled transfer processes
Generalised Cottrell equation .