Data

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  Area

  Area is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of the areas of the exposed sides of a polyhedron....
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  Density

  The density of a material is defined as its mass per unit volume. The symbol of density is ρ (the Greek letter rho). Mathematically: where: Different materials usually have different densities, so density is an important concept regarding buoyancy, metal purity and packaging. In some cases density...
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  Energy

  In physics, energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working") is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law....
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  Mass

  For other "mass", see Mass (disambiguation) In physics, mass (from Ancient Greek: μᾶζα) commonly refers to any of three properties of matter, which have been shown experimentally to be equivalent: inertial mass, active gravitational mass and passive gravitational mass. In everyday usage, mass is...
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  Thermal conductivity

  In physics, thermal conductivity, k, is the property of a material that indicates its ability to conduct heat. It appears primarily in Fourier's Law for heat conduction. Generally speaking, there are a number of possibilities to measure thermal conductivity, each of them suitable for a limited...

• Temperature coefficient

  The temperature coefficient is the relative change of a physical property when the temperature is changed by 1 K. In the following formula, let R be the physical property to be measured and T be the temperature at which the property is measured. T0 is the reference temperature, and ΔT is the...

• Molar mass

  Molar mass, symbol M, is the mass of one mole of a substance (chemical element or chemical compound). It is a physical property which is characteristic of each pure substance. The base SI unit for mass is the kilogram but, for both practical and historical reasons, molar masses are almost always...

• Speed

  Speed is the rate of motion, or equivalently the rate of change of distance. Speed is a scalar quantity with dimensions length/time; the equivalent vector quantity to speed is velocity. Speed is measured in the same physical units of measurement as velocity, but does not contain the element of...

• Angle

  In geometry and trigonometry, an angle (in full, plane angle) is the figure formed by two rays sharing a common endpoint, called the vertex of the angle (Sidorov 2001). The magnitude of the angle is the "amount of rotation" that separates the two rays, and can be measured by considering the length...

• Frequency

  Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. For cyclical processes, such as rotation, oscillations, or waves,...