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jedinica atomske mase

The masses of atoms and molecules are generally given in atomic mass units. These units are based on a scale in which the mass of carbon 12 is taken to be 12. Atomic masses were originally given as atomic weights on a scale where the mass of the hydrogen atom was unity, later they were based on oxygen or oxygen 16; these scales have all been replaced by the carbon 12 scale.

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jedinica
Chemistry; General chemistry

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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Mekan, srebrno-beli radioaktivni metal koji sija u mraku

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Controlling the shape of a telescope mirror at a relatively slow rate.

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Compensating for atmospheric distortions in a wavefront by high-speed changes in the shape of a small, thin mirror.

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radioactive silvery metal which does not occur naturally

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

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