Mass
Mass, abbreviated as m, is the amount of matter an object has. It is the property of a body that causes it to have weight in a gravitational field. It is sometimes used interchangeably in place of weight. Mass is a scalar quantity having magnitude and is independent of any specific direction.
Weight is a vector quantity that depends on the gravity at a specific location. The mass of an object is different from its weight, which is the force exerted on the object by gravity. Mass is a fundamental property of matter, whereas weight is dependent on the object's mass and the acceleration due to gravity.
Mass formula |
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\( m \;=\; \rho \; V \) (Mass) \( \rho \;=\; m \;/\; V \) \( V \;=\; m \;/\; \rho \) |
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Symbol | English | Metric |
\( m \) = Mass | \(lbm\) | \(kg\) |
\( \rho \) (Greek symbol rho) = Density | \(lbm \;/\; ft^3\) | \(kg \;/\; m^3\) |
\( V \) = Volume | \(ft^3\) | \(m^3\) |
Mass Types
Gravitational Mass - The mass of an object as measured by its interaction with gravity, it is equal to its inertial mass.
Internal Mass - The mass of an object measured by its resistance to acceleration when a force is applied.
Invariant Mass - The inferred value of the mass is independent of the reference frame in which the energies and momentum are measured so that the mass is invariant.
Mass Diffusivity - A proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species.
Molar Mass - The mass of a given compound equal to its molecular mass in gram.
Relativity Mass - The mass of a body in motion relative to the observer.
Rest Mass - Rest 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.
Tags: Mass