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The kilogram (kg) is the base unit of mass in the SI system of units. The standard kilogram is a 1 kg corrosion resistant platinum/iridium cylinder, carefully preserved in the ...

gustina

Chemistry; General chemistry

Density is the mass per unit volume of any substance. Its units are kilograms per cubic metre.

kilo-kalorija

Physics; General physics

The amount of energy required to raise the temperature of one kilogram of water by 1 , 1 Kcal = 1000 calories.

neidentifikovani leteći objekat (NLO)

Aerospace; Space flight

UFOs are unidentified aircraft which are attributed to alien space flight. One supposed UFO halted air traffic at Hangzhou Airport, China, on July 7. The appearance is being ...

svemirski šatl

Aerospace; Space flight

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

zenit

Aerospace; Space flight

The point on the celestial sphere directly above the observer. Opposite the nadir.

x-zrak

Aerospace; Space flight

Electromagnetic radiation in the neighborhood of 100 picometer wavelength.

x-dijapazon

Aerospace; Space flight

A range of microwave radio frequencies in the neighborhood of 8 to 12 ghz.

težina

Aerospace; Space flight

The gravitational force exerted on an object of a certain mass. The weight of mass m is mg Newtons, where g is the local acceleration due to a body's gravity.