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Acoustics is the branch of physics that deals with the study of all mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.

The word “ornithology” derives from the ancient Greek ????? ornis (“bird”) and ????? logos (“rationale” or “explanation”).

‘Ceramics’ deals with Pottery

It was launched by India on 19 April 1975 from Kapustin Yar, a Russian rocket launch and development site in Astrakhan Oblast using a Kosmos-3M launch vehicle. It was built by the Indian Space Research Organisation (ISRO) to gain experience in building and operating a satellite in space.

Odontography; or, A treatise on the comparative anatomy of the teeth; their physiological relations, mode of development, and microscopic structure, in the vertebrate animals.

In physics, cryogenics is the production and behaviour of materials at very low temperatures. A person who studies elements that have been subjected to extremely cold temperatures is called a cryogenicist.

This process is similar to what causes clouds to form and rain to fall. Moisture in the air is condensed and precipitated because of cooler temperature or similar effect. The formation of dew is almost exactly like the formation of the water droplets on the outside of a cold bottle.

It depends upon how you define “coldest.” With Pluto out of the race, the farthest “real” planet from the Sun is Neptune. Neptune and its neighbor, Uranus, are known as the “ice giants,” since they are composed of huge amounts of rock and water, ammonia, and methane ice crystals.

Rain water is considered the purest form of water. Impurities and salts present in water on earth are left behind during vaporisation by the sun. However, the rain water we receive on earth is not necessarily pure, as it brings down impurities and particles present in the atmosphere along with it.

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