бірлік

A system of non-SI units used in quantum chemistry to simplify calculations and mathematical expressions. The definitions of atomic units include physical constants (like the ...

қосалқы бірлік

Химия; Общая химия

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.

астрономиялық бірлік (АБ)

Астрономия; Общая астрономия

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 ...

олефин

Химия; Общая химия

A compound that consists of only carbon and hydrogen, that contains at least one carbon-carbon double bond. Alkene names end with -ene. Examples are ethylene (CH2=CH2); 1-propene ...

майшыт

Химия; Общая химия

A colloid formed from tiny liquid droplets suspended in another, immiscible liquid. Milk is an example of an emulsion.

нейтрино

Химия; Общая химия

An elementary particle produced by certain nuclear decay processes. Neutrinos have no charge and extremely small masses compared to other subatomic particles.

қос жылу

Химия; Общая химия

A device that senses temperature changes by using a pair of joined wires made of dissimilar metals that produces a voltage that changes with temperature.

калориметр

Химия; Общая химия

An insulated vessel for measuring the amount of heat absorbed or released by a chemical or physical change.

гидроксил

Химия; Общая химия

1. An -OH group within a molecule. 2. A free radical formed by abstraction of a hydrogen atom from water.

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A body of relatively still fresh or salt water of considerable size, localized in a basin that is surrounded by land. Lakes are inland and not part of ...