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Gravitational Mass

Gravitational mass is the strength of its gravitational interaction with other objects. In simple terms, it's a measure of how much an object responds to the force of gravity. Gravitational mass is what we typically think of when we talk about mass in...

Mass Diffusivity

Mass diffusivity, abbreviated as \(D\) or \(D_m\), also called diffusivity, is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species. Diffusion is the spread of gases, liquids,...

Rest Mass

Rest mass, abbreviated as \(m_0\), also called invariant mass, of a body is measured when the body is at rest and motionless, and is also relative to an observer moving or not moving. This is the mass that an observer would measure for the particle if...

Bejan Number - Mass Transfer

Bejan Number - Mass Transfer formula \( Be \;=\; \dfrac{ \Delta p \cdot l^2 }{ \mu \cdot D_m }\) (Bejan Number - Mass Transfer) \( \Delta p \;=\; \dfrac{ Be \cdot \mu \cdot Dm }{ l^2 }\) \( l \;=\; \sqrt{ \dfrac{ Be \cdot \mu \cdot Dm }{ \Delta p } }\)...

Physics Constants

S - T - U - V - W - X - Y - Z Symbol Value Unit A Acceleration of Gravity \( g = 9.806,65 \) \(m \;/\; s^2\) Alpha Particle Mass \(m_a = 6.644,657 \;x\;10^{-27} \) \( kg \) Angular Planck Constant \(a_p = 1.054,571 \;x\;10^{-34} \) \(J-s\) Atomic Mass...

Quantum Mechanics Glossary

The unit of measurement for amount of substance in the International System of Units (SI) is the mole (mol). Atomic Mass - ,A measure of the average mass of the atoms in a chemical element. The atomic mass of an element takes into account the masses of...

Moment of Inertia

inertia, measures the resists or change an object has to rotational acceleration about an axis. It is analogous to the mass of an object in linear motion and plays a similar role in rotational dynamics. The larger the moment of inretia the more...

Law of Conservation of Mass-Energy

The Law of conservation of mass-energy is a fundamental principle in physics that states that the total mass-energy of a closed system remains constant. It combines the principles of conservation of mass and conservation of energy into a unified...

Continuity Equation

Initial Area Cross-section Density \(lbm \;/\; ft^3\) \(kg \;/\; m^3\) The continuity equation, also called conservation of mass equation, is a fundamental principle in fluid dynamics that describes the conservation of mass within a fluid flow. It...

Sherwood Number

\dfrac{ K \cdot l_c }{ Sh } \) Symbol English Metric \(Sh \) = Sherwood Number \(dimensionless\) \(dimensionless\) \( K \) = Mass Transfer Coefficient \(dimensionless\) \(dimensionless\) \( l_c \) = Characteristic Length \(ft\) \(m\) \( D \) = Diffusion...

Gravitational Field

\) \(m\;/\;s^2\) \( G \) = Universal Gravitational Constant \(lbf-ft^2\;/\;lbm^2\) \(N - m^2\;/\;kg^2\) \( m \) = Earth Mass \(lbm\) \(kg\) \( r \) = Distance from Center of Earth \(ft\) \( m \) Gravitational field, abbreviated as g, is a region of...

Lewis Number

\(dimensionless\) \( \alpha \) (Greek symbol alpha) = thermal diffusivity \(ft^2\;/\;sec\) \(m^2\;/\;s\) \( D_m \) = mass diffusivity \(ft^2\;/\;sec\) \(m^2\;/\;s\) Lewis number, abbreviated as Le, a dimensionless number, is the ratio of thermal...

Polymer Glossary

- U - V - W - X - Y - Z Cast resin - A resinous product prepared by pouring liquid resins into a mold and heat treating the mass to harden it. Catalysis - The acceleration (or retardation) of a chemical reaction by the presence of a comparatively small...

Coriolis Flow Meter

Coriolis flow meter, also called Coriolis mass flow meter, an advanced flow measurement device designed to directly measure the mass flow rate of a fluid, whether it be a liquid, gas, or slurry. Its operation relies on the Coriolis effect, where the...

Density

\rho } \) Symbol English Metric \( \rho \) (Greek symbol rho) = Density \(lbm \;/\; ft^3\) \(kg \;/\; m^3\) \( m \) = Object Mass \(lbm\) \(kg\) \( V \) = Object Volume \(ft^3\) \(m^3\) Density, abbreviated as \(\rho\) (Greek symbol rho), also called...

Formula Symbols - E

escape velocity $\large{\frac{ft}{sec}}$ $\large{\frac{m}{s}}$ $m-s^{-1}$ $1.1186\;x\;10^4$ $\large{\frac{m}{s}}$ - - earth mass $lbm$ $kg$ $kg$ $5.9736\;x\;10^{24}$ $kg$ - - earth mean density $\large{\frac{lbm}{ft^3}}$ $\large{\frac{kg}{m^3}}$...