apparent mass

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• Mass–energy equivalence — E=MC2 redirects here. For other uses, see E=MC2 (disambiguation). 4 meter tall sculpture of Einstein s 1905 E = mc2 formula at the 2006 Walk of Ideas, Berlin, Germany In physics, mass–energy equivalence is the concept that the …   Wikipedia

• mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …   Universalium

• Mass psychogenic illness — (MPI), also called mass sociogenic illness,[1] is “the rapid spread of illness signs and symptoms affecting members of a cohesive group, originating from a nervous system disturbance involving excitation, loss or alteration of function, whereby… …   Wikipedia

• Apparent weight — An object s weight, henceforth called actual weight , is the downward force exerted upon it by a gravitational field. By contrast, an object s apparent weight is the (usually upward) force (the normal force , or reaction force ), typically… …   Wikipedia

• Apparent magnitude — Asteroid 65 Cybele and 2 stars with their magnitudes labeled The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere.… …   Wikipedia

• Mass — This article is about the scientific concept. For the substance of which all physical objects consist, see Matter. For other uses, see Mass (disambiguation). Classical mechanics …   Wikipedia

• Mass versus weight — The chains on the swing hold all the child’s weight. If one were to stand behind her at the bottom of the arc and try to stop her, one would be acting against her inertia, which arises purely from mass, not weight. In everyday usage, the mass of… …   Wikipedia

• mass transit — a system of large scale public transportation in a given metropolitan area, typically comprising buses, subways, and elevated trains. Cf. rapid transit. * * * Transportation systems, usually publicly but sometimes privately owned and operated,… …   Universalium

• mass production — the production or manufacture of goods in large quantities, esp. by machinery. [1915 20] * * * Application of the principles of specialization, division of labour, and standardization of parts to the manufacturing of goods on a large scale.… …   Universalium

• Mass fraction (chemistry) — In chemistry, the mass fraction wi is the fraction of one substance with mass mi to the mass of the total mixture mtot, defined as [1]: The sum of all the mass fractions is equal to 1: It is one way of expressing t …   Wikipedia

• Mass–luminosity relation — In astrophysics, the mass–luminosity relation is an equation giving the relationship between a star s mass and its luminosity. The relationship is represented by the equation: where L⊙ and M⊙ are the luminosity and mass of the sun and… …   Wikipedia