Physics - Assignment Point

Physics

Atomic Clock

Atomic Clock Definition Atomic clock is an extremely precise clock whose rate is controlled by a periodic process, such as vibration, or the absorption or emission of electromagnetic radiation that occurs at a steady rate in atoms or molecules. It is the most accurate type of timepiece in the wor.....

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Caesium

Caesium Definition Caesium is a soft, ductile, silvery-white element of the alkali group. It is liquid at room temperature and is the most reactive of all metals. It is a chemical element with symbol Cs and its atomic number 55; atomic weight 132.905; melting point 28.5°C; boiling point 690°C; .....

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Barium

Barium Definition Barium is a soft, silvery-white metallic element of the alkaline-earth group. It occurs only in combination with other elements, especially in barite. It is a chemical element with symbol Ba and its atomic number 56; atomic weight 137.33; melting point 725°C; boiling point 1,14.....

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Strontium

Strontium Definition Strontium is a soft, silvery metallic element of the alkaline-earth group that occurs naturally only as a sulfate or carbonate. It is the chemical element with symbol Sr and its atomic number 38; atomic weight 87.62; melting point 769°C; boiling point 1,384°C; specific grav.....

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Rubidium

Rubidium Definition Rubidium is a soft, silvery-white metallic element of the alkali group. It ignites spontaneously in air and reacts violently with water. It is a chemical element of group 1 with the abbreviation Rb and atomic number 37. As a member of the alkali metals, rubidium has an oxidati.....

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About Lithium

About Lithium Definition Lithium is a soft, silvery metallic element of the alkali group that occurs in small amounts in some minerals. It is the lightest of all metals and is highly reactive. It is a chemical element with symbol Li and its atomic number 3; atomic weight 6.941; melting point 179.....

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Fluoride

Fluoride Definition Fluoride is a compound containing fluorine and another element or radical. Fluorine combines readily with nearly all the other elements, except the noble gases, to form fluorides. In some countries, fluoride is added to the drinking water as a preventive measure against tooth .....

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Aluminium

Aluminium Definition Aluminium is a silvery-white, ductile metallic element, the most abundant in the earth’s crust but found only in combination, chiefly in bauxite. Aluminium metal is so chemically reactive that native specimens are rare and limited to extreme reducing environments. Inste.....

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About Bronze

About Bronze Definition Bronze is a yellow or brown alloy of copper and tin, sometimes with small amounts of other metals such as lead or zinc. Compositions vary, but most modern bronze is 88% copper and 12% tin. Bronze is harder than brass and is used both in industry and in art. It is one [&hel.....

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Ceramic

Ceramic Definition Ceramic are any of various hard, brittle, heat- and corrosion-resistant materials made typically of metallic elements combined with oxygen or with carbon, nitrogen, or sulfur. Ceramics are generally thought of as inorganic and nonmetallic solids with a range of useful propertie.....

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Malachite

Malachite Definition Malachite is a bright-green monoclinic mineral occurring as a mass of crystals (an aggregate) with smooth or botryoidal (grape-shaped) surfaces. It is often concentrically banded in different shades of green. It occurs together with the mineral azurite in copper deposits. Its.....

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About Azurite

About Azurite Definition Azurite is a soft stone, named for its deep “azure blue” color. It is a copper carbonate mineral found in the upper oxidized portions of copper ore formed in masses, nodules, tabular or prismatic crystals, sometimes with a vitreous luster. The saturated color ranges f.....

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