Science

Mathematics Logarithms In mathematics, logarithms were developed for making complicated calculations simple. In mathematics, the logarithm is the inverse operation to exponentiation, just as division…

Aphthitalite is a potassium sulfate mineral with the chemical formula: (K, Na)3Na(SO4)2. It is a mineral consisting of potassium sodium sulfate occurring massive or in…

An apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite, and chlorapatite, with high concentrations of OH−, F−, and Cl− ions, respectively,…

Apachite is a copper silicate mineral with a general formula of Cu9Si10O29·11H2O. It is a phonolitic rock containing abundant amphibole and aenigmatite associated with the…

Cross multiplication to solve proportions Cross multiplying is a way to solve an equation that involves a variable as part of two fractions set equal…

Antlerite is a greenish hydrous copper sulfate mineral, with the formula Cu3(SO4)(OH)4. It has been an important ore of copper and forms nice mineral specimens.…

A polynomial of the second degree is generally called a quadratic polynomial. In elementary algebra, the quadratic formula is the solution of the quadratic equation. There…

A ratio is a statement of how two numbers compare. It is a comparison of the size of one number to the size of another…

Antitaenite is a meteoritic metal alloy mineral composed of iron and nickel, 20–40% Ni (and traces of other elements) that has a face-centered cubic crystal…

Antimony is a chemical element with symbol Sb (from Latin: stibium) and atomic number 51. A lustrous grey metalloid, it is found in nature mainly…

The serpentine subgroup (part of the kaolinite-serpentine group) are greenish, brownish, or spotted minerals commonly found in serpentinite rocks. Besides for the main members of…

Anthonyite is a hydrous secondary copper halide mineral with the chemical formula of Cu(OH, Cl)2•3(H2O). It is not radioactive. It was discovered in 1963 in…