mass

Test Process that measures a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

Test Process that measures a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

Test Process that measures the conventional value of the result of weighing a body in air equals the mass of a standard that balances this body under the following conventionally chosen conditions: ambient temperature 20 °C air density 1.2 mg/cm³ mass density 8.000 g/cm³ Conventional mass has the same unit as mass (the kilogram), because the multiplication of a mass by a dimensionless quantity defines its values. Labs typically measure mass and correct the results from actual to conventional conditions. “Apparent Mass versus 8.0 g/cm³” formerly equated to conventional mass in the United States. References: NISTIR 6969 (2019) https://www.nist.gov/publications/nistir-6969-selected-laboratory-and-measurement-practices-and-procedures-support-1 OIML D28 (2004) https://www.oiml.org/en/files/pdf_d/d028-e04.pdf NIST Handbook 44: https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/other-nist-handbooks/other-nist-handbooks-2-3

Test Process that measures the quantity of matter which a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field. The term “mass” is always used in the strict Newtonian sense as a property intrinsic to matter. Mass is the proportionality constant between a force on a material object and its resulting acceleration. This property is sometimes referred to as “true mass”, “vacuum mass”, or “mass in a vacuum” to distinguish it from conventional [apparent] mass. The true quantity of matter represented in a vacuum with no gravitational force.

Measuring the ratio of the mass of water vapor to the total mass of the dry air. The gravimetric method of calibration determines the specific humidity, with pressure and temperature having no effect on the masses. Also referred to as moisture content

Test Process that sources a gas’s density as defined by the amount of mass present in a specified volume of gas at a given temperature and pressure. Gases are extremely responsive to temperature and pressure, causing their densities to change rather quickly. Measuring the density of gas the Ideal Gas Law (P*V = nRT) must be taken into account. ** Includes non-uniformity

Test Process that sources a liquid’s density as defined by the amount of mass present in a specified volume of liquid at a given temperature. Temperature affects density, as does the pressure to the extent that the liquid compresses. In, liquids deemed sufficiently incompressible, the volume does not depend on pressure.

Test Process that sources a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

Test Process that sources a gas’s density as defined by the amount of mass present in a specified volume of gas at a given temperature and pressure. Gases are extremely responsive to temperature and pressure, causing their densities to change rather quickly. Measuring the density of gas the Ideal Gas Law (P*V = nRT) must be taken into account. ** Includes non-uniformity

Test Process that sources a liquid’s density as defined by the amount of mass present in a specified volume of liquid at a given temperature. Temperature affects density, as does the pressure to the extent that the liquid compresses. In, liquids deemed sufficiently incompressible, the volume does not depend on pressure.

Test Process that sources a solid’s density as defined by the amount of mass present in a specified volume temperature. Temperature affects density as solids expand and contract according to their temperature coefficients. ** Includes voids and non-uniformity

Test Process that sources a conventional value of the result of weighing a body in air equals the mass of a standard that balances this body under the following conventionally chosen conditions: ambient temperature 20 °C air density 1.2 mg/cm³ mass density 8.000 g/cm³ Conventional mass has the same unit as mass (the kilogram), because the multiplication of a mass by a dimensionless quantity defines its values. Labs typically measure mass and correct the results from actual to conventional conditions. “Apparent Mass versus 8.0 g/cm³” formerly equated to conventional mass in the United States. References: NISTIR 6969 (2019) https://www.nist.gov/publications/nistir-6969-selected-laboratory-and-measurement-practices-and-procedures-support-1 OIML D28 (2004) https://www.oiml.org/en/files/pdf_d/d028-e04.pdf NIST Handbook 44: https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/other-nist-handbooks/other-nist-handbooks-2-3

Test Process that sources a quantity of matter which a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field. The term “mass” is always used in the strict Newtonian sense as a property intrinsic to matter. Mass is the proportionality constant between a force on a material object and its resulting acceleration. This property is sometimes referred to as “true mass”, “vacuum mass”, or “mass in a vacuum” to distinguish it from conventional [apparent] mass. The true quantity of matter represented in a vacuum with no gravitational force.