reflektovani zrak

Gamma rays are like the light we see with our eyes, the x-rays used to probe our bodies in search of problems, and the radio waves that our television sets translate into inane ...

alfa-zrak

Chemistry; General chemistry

A stream of alpha particles . Alpha rays rapidly dissipate their energy as they pass through materials, and are far less penetrating than beta particles and gamma rays .

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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Industry/Domain: Aerospace Category: Space flight

svemirski šatl

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