Thread:SammyChance/@comment-33998198-20180123160503/@comment-27941262-20180128205701

Jafari: In  science, a  formula is a concise way of expressing information symbolically, as in a mathematical or  chemical formula. The informal use of the term  formula in science refers to the  general construct of a relationship between given quantities. The plural of  formula can be spelled either as  formulas or  formulae (from the original Latin). [1]

In mathematics, a formula is an entity constructed using the symbols and formation rules of a given logical language.[2]  For example, determining the volume of a sphere requires a significant amount of integral calculus or its geometrical analogue, the method of exhaustion;[3]  but, having done this once in terms of some parameter(the radius for example), mathematicians have produced a formula to describe the volume: This particular formula is:
 * {\displaystyle V={\frac {4}{3}}\pi r^{3}}.

Having obtained this result, the volume of any sphere can be computed as long as its radius is known. Note that the volume V and the radius rare expressed as single letters instead of words or phrases. This convention, while less important in a relatively simple formula, means that mathematicians can more quickly manipulate larger and more complex formulas.<sup class="reference" id="cite_ref-4" style="font-variant:inherit;font-stretch:inherit;line-height:1;font-family:inherit;font-size:0.75em;background:none;unicode-bidi:isolate;white-space:nowrap;">[4]  Mathematical formulas are often algebraic, closed form, and/or analytical.

<p style="margin-top:0.5em;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;line-height:inherit;font-family:"HelveticaNeue",Helvetica,"NimbusSansL",Arial,"LiberationSans",sans-serif;font-size:16px;background:nonergb(255,255,255);color:rgb(34,34,34);">In modern chemistry, a chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols, numbers, and sometimes other symbols, such as parentheses, brackets, and plus (+) and minus (−) signs.<sup class="reference" id="cite_ref-5" style="font-variant:inherit;font-stretch:inherit;line-height:1;font-family:inherit;font-size:0.75em;background:none;unicode-bidi:isolate;white-space:nowrap;">[5]  For example, H<sub style="font-variant:inherit;font-stretch:inherit;line-height:1;font-family:inherit;font-size:0.75em;background:none;">2 O is the chemical formula for water, specifying that each molecule consists of two hydrogen (H) atoms and one oxygen (O) atom. Similarly, O<span style="margin-bottom:-0.3em;font-variant:inherit;font-stretch:inherit;line-height:1.2em;font-family:inherit;font-size:12.8px;vertical-align:-0.4em;background:none;display:inline-block;">− 3  denotes an ozone molecule consisting of three oxygen atoms and having a net negative charge.

<p style="margin-top:0.5em;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;line-height:inherit;font-family:"HelveticaNeue",Helvetica,"NimbusSansL",Arial,"LiberationSans",sans-serif;font-size:16px;background:nonergb(255,255,255);color:rgb(34,34,34);">In a general context, formulas are applied to provide a mathematical solution for real world problems. Some may be general: <span class="texhtml" style="font-variant:inherit;font-stretch:inherit;line-height:inherit;background:none;white-space:nowrap;">F = ma, which is one expression of Newton's second law, is applicable to a wide range of physical situations. Other formulas may be specially created to solve a particular problem; for example, using the equation of a sine curve to model the movement of the tides in a bay. In all cases, however, formulas form the basis for calculations.

<p style="margin-top:0.5em;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;line-height:inherit;font-family:"HelveticaNeue",Helvetica,"NimbusSansL",Arial,"LiberationSans",sans-serif;font-size:16px;background:nonergb(255,255,255);color:rgb(34,34,34);">Expressions are distinct from formulas in that they cannot contain an equals sign (=).<sup class="reference" id="cite_ref-6" style="font-variant:inherit;font-stretch:inherit;line-height:1;font-family:inherit;font-size:0.75em;background:none;unicode-bidi:isolate;white-space:nowrap;">[6]  Whereas formulas are comparable to sentences, expressions are more like phrases.