Авогадров број

Авогадров број

The number of atoms in 12 grams of carbon 12. The number of atoms in a gram-atom (mass in grams numerically equal to the atomic weight) or the number of molecules in a gram-molecule (mass in grams numerically equal to the molecular weight.)

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Szófaj: noun
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Ipar/Tárgykör: Astronomy
Kategória: General astronomy
Company: Caltech
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Software; Computer; Operating systems

In AppleScript, a synonym for the classes integer and real .

zenit

Astronomy; General astronomy

The point directly overhead in the sky.

рефрактор

Astronomy; General astronomy

A telescope that uses as its primary optical element a lens. Binoculars are a type of refractor. In general, refractors are much more expensive to build and buy than are ...

рефлектор

Astronomy; General astronomy

A telescope that uses as its primary optical element a mirror. Nearly all large telescopes in use today by amateur and professional astronomers are reflecting telescopes.

фотометрија

Astronomy; General astronomy

In astronomy, the measurement of the light emitting from astronomical objects, generally in the visible or infrared bands, in which a specific or general wavelength band is ...

паралакса

Astronomy; General astronomy

The apparent displacement or the difference in apparent direction of an object as seen from two different points not on a straight line with the object (as from two different ...

орбита

Astronomy; General astronomy

The path of one object about another (used here for an object orbiting the sun).

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Ipar/Tárgykör: Aerospace Kategória: Space flight

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A reusable spacecraft with wings developed by the U.S. National Aeronautics and Space Administration (NASA) for human spaceflight missions. The first ...