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The Common University Entrance Test (CUET), formerly Central Universities Common Entrance Test (CUCET) is a standardised test in India conducted by the National Testing Agency at various levels—CUET (UG), [1] CUET (PG), [2] and CUET (PhD), [3] for admission to undergraduate, postgraduate, and doctorate programmes in Central Universities and other participating institutes. [4]
Lever rule. In chemistry, the lever rule is a formula used to determine the mole fraction ( xi) or the mass fraction ( wi) of each phase of a binary equilibrium phase diagram. It can be used to determine the fraction of liquid and solid phases for a given binary composition and temperature that is between the liquidus and solidus line.
Chemical nomenclature. Chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC). IUPAC Nomenclature ensures that each compound (and its various isomers) have only ...
In solid-state physics and solid-state chemistry, a band gap, also called a bandgap or energy gap, is an energy range in a solid where no electronic states exist. In graphs of the electronic band structure of solids, the band gap refers to the energy difference (often expressed in electronvolts) between the top of the valence band and the ...
Gallium arsenide ( GaAs) is a III-V direct band gap semiconductor with a zinc blende crystal structure. Gallium arsenide is used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infrared light-emitting diodes, laser diodes, solar cells and optical windows.
A tube of commercial graphite powder lubricant with molybdenum disulfide additive (called "molybdenum") [ 33] Due to weak van der Waals interactions between the sheets of sulfide atoms, MoS. 2 has a low coefficient of friction. MoS. 2 in particle sizes in the range of 1–100 μm is a common dry lubricant. [ 34]
In physics, the Bardeen–Cooper–Schrieffer ( BCS) theory (named after John Bardeen, Leon Cooper, and John Robert Schrieffer) is the first microscopic theory of superconductivity since Heike Kamerlingh Onnes's 1911 discovery. The theory describes superconductivity as a microscopic effect caused by a condensation of Cooper pairs.
Textbook. Textbooks written in Pashto distributed to Afghan school children. A textbook is a book containing a comprehensive compilation of content in a branch of study with the intention of explaining it. Textbooks are produced to meet the needs of educators, usually at educational institutions.