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 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.
Mass formula |
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| \(\large{ m = \rho \; V }\) | ||
Mass - Solve for m\(\large{ m = \rho \; V }\)
Mass - Solve for ρ\(\large{ \rho = \frac{ m }{ V } }\)
Mass - Solve for V\(\large{ V = \frac{ m }{ \rho } }\)
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| Symbol | English | Metric |
| \(\large{ m }\) = mass | \(\large{lbm}\) | \(\large{kg}\) |
| \(\large{ \rho }\) (Greek symbol rho) = density | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) |
| \(\large{ V }\) = volume | \(\large{ft^3}\) | \(\large{m^3}\) |
Tags: Mass Equations Types