Formula

The informal use of the term formula in science refers to the general construct of a relationship between given quantities.

For example, determining the volume of a sphere requires a significant amount of integral calculus or its geometrical analogue, the method of exhaustion.

For example, the formula is an expression of Newton's second law, and is applicable to a wide range of physical situations.

Other formulas, such as the use of the equation of a sine curve to model the movement of the tides in a bay, may be created to solve a particular problem.

Expressions are distinct from formulas in the sense that they don't usually contain relations like equality (=) or inequality (<).

Similarly, O−3 denotes an ozone molecule consisting of three oxygen atoms[10] and a net negative charge.

An example is boron carbide, whose formula of CBn is a variable non-whole number ratio, with n ranging from over 4 to more than 6.5.

Except for the very simple substances, molecular chemical formulas generally lack needed structural information, and might even be ambiguous in occasions.

In computing, a formula typically describes a calculation, such as addition, to be performed on one or more variables.

This is a shortcut for the "paper" form A3 = A1+A2, where A3 is, by convention, omitted because the result is always stored in the cell itself, making the stating of the name redundant.

In statistical thermodynamics, it is a probability equation relating the entropy S of an ideal gas to the quantity W, which is the number of microstates corresponding to a given macrostate: where k is the Boltzmann constant, equal to 1.380649×10−23 J⋅K−1, and W is the number of microstates consistent with the given macrostate.