decibel

decibel

Unit of sound level, if P1 & P2 are two amounts of power, the first is said to be n decibels greater, where n = 10 log10 (P1/P2)

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decibel (dB)

Aerospace; Satellites

The standard unit used to express the ratio of two power levels. It is used in communications to express either a gain or loss in power between the input and output devices.

jedinica atomske mase

Physics; General physics

It is equal to one-twelfth the mass of C -12 isotope of carbon, 1 amu = 1.66x 10-27 Kg.

atomski broj

Physics; General physics

The number of protons in an atomic nucleus.

balmerove linije

Physics; General physics

Lines in the spectrum of hydrogen atom in visible range, produced by transition between n 2 and n = 2, n is the principal quantum no.

bar

Physics; General physics

A unit of pressure, equal to 105 Pascals.

barion

Physics; General physics

subatomic particle composed of three quarks.

takt

Physics; General physics

A phenomenon of the periodic variation in the intensity of sound due to superposition of waves differing slightly in frequency.

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Džon Lenon

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