eFunda: About Us

eFunda is all about the basics, for most part, that means college level material covered in engineering schools. If you practice engineering, more often than not you would find yourself searching for something you knew but could not quite remember. eFunda wants to be your reminder of these formulas. Not only that, eFunda wants to tell you ...

eFunda: Units and Constants

The index page for units, fundamental constants, and currencies.

eFunda: Theory of Hot-Wire Anemometers

where I is the input current, R w is the resistance of the wire, T w and T f are the temperatures of the wire and fluid respectively, A w is the projected wire surface area, and h is the heat transfer coefficient of the wire.. The wire resistance R w is also a function of temperature according to,

eFunda: Definition of ASTM Steels

ASTM (American Society for Testing and Materials) steels are those carbon and alloy steels that are commonly used but not initially included in AISI designations.

#تاكمرت (الاسم القديم لشط الجريد) مكان من اندر ...

#تاكمرت (الاسم القديم لشط الجريد) مكان من اندر المناطق الرطبة في العالم ، يمتد تقريبا على مساحة 1200 هكتار ، له خصائص تميزه بفردانية عديمة النظير لكن...

eFunda: Advanced Annual Percentage Rate Calculator

Calculates the Annual Percentage Rate for loans with added costs and different compounding and payment frequencies.

eFunda: O-Ring Materials Compatibile with Chemical …

This page contains a guide to selecting O-ring materials based on chemical compatibility requirements. The chemical compatibility data can be presented in one of two ways.

Flowrate Calculation for a Draining Tank - eFunda

Equations used in the Calculation: For low-viscosity incompressible fluids such as water, the incompressible Bernoulli equation describes the flow.

eFunda Polymers: Properties of ABS {ABS / PC, flame …

Metal 3D Printing Design Guide. Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

eFunda: Advanced Loan Calculators

Calculate monthly payments, interest rates, and/or number of payments for loans with different compounding and payment frequencies.