jedinica

jedinica

A standard for comparison in measurements. For example, the meter is a standard length which may be compared to any object to describe its length.

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Categorie: Chimie în general
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izvedena jedinica

Chimie; Chimie în general

Derived units are units constructed from the SI system's base units . For example, the SI unit for density is kg/m3, derived from the base units kg and m.

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A unit for measuring acceleration, which is metre per second squared.

astronomska jedinica

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The mean Earth-Sun distance, equal to 149. 5 million kilometers or 93 million miles.

absolutna jedinica

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A unit of measurement whose value is defined in a fixed or unvarying manner independently of the phenomenon being measured.

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Astronomie; Astronomie în general

1) Mean distance between the Earth and the Sun: 1.495985 × 1011 m. 2) The AU is the preferred unit for distances within the solar system. Mercury, the innermost planet, lies on ...

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A solid or liquid material that easily vaporizes. A material with a significant vapor pressure .

abraziv

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A very hard, brittle, heat-resistant substance that is used to grind the edges or rough surfaces of an object. boron carbide, diamond, and corundum are abrasives.

diastereoizomer, diastereomer

Chimie; Chimie în general

Stereoisomers which are not mirror images of each other. Diastereomers are chemically similar but distinguishable; they have different melting points and boiling points and they ...

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slab elektrolit

Chimie; Chimie în general

A weak electrolyte is a solute that incompletely dissociates into ions in solution. For example, acetic acid partially dissociates into acetate ions and hydrogen ions, so that ...