Formula: meaning, definitions and examples

Used in mathematics, science, and engineering to represent a general principle or relationship with variables.

• The formula for calculating the area of a circle is πr².
• She used a chemical formula to determine the solution's concentration.

Specific to mathematics and science, where it represents a statement that two expressions are equal.

• To solve this math problem, you need to balance the equation.
• Einstein's famous equation, E=mc², shows the relationship between energy and mass.

Refers to mathematical phrases that can include numbers, variables, and operators, but it does not have an equality sign.

• Simplify the expression by combining like terms.
• In algebra, you often work with expressions containing variables.

Describes a guideline or principle that explains how something works or how something should be done.

• A rule in grammar states that a sentence must have a subject and a predicate.
• The company's rule is to submit reports by the end of each month.

General situations where a mathematical or scientific rule is being expressed using symbols. It is a broad term that can apply to many fields such as mathematics, physics, chemistry, and economics.

• The formula for calculating the area of a circle is A = πr^2
• Newton's second law of motion is expressed in the formula F = ma

Primarily used in the context of chemistry to describe the symbolic representation of chemical compounds and reactions. This includes elements, chemical bonds, and their relative positions.

• The chemical notation for water is H2O
• The reaction for the combustion of methane can be written using chemical notation as CH4 + 2O2 -> CO2 + 2H2O

Specifically used in chemistry to denote the types and numbers of atoms in a molecule. It provides a simple count of each type of atom in a molecule without showing how the atoms are bonded or arranged.

• The molecular formula of glucose is C6H12O6
• Knowing the molecular formula helps in identifying the basic components of the compound

Used in scientific, mathematical, or technical contexts to describe a fixed way of doing something or solving a problem.

• She derived a new formula to calculate the speed of the reaction
• The formula for water is H2O

Typically used in cooking to describe a set of instructions for preparing a particular dish. It can be used metaphorically in informal contexts.

• She tried a new recipe for chocolate cake
• Hard work and dedication are the recipe for success

Similar to 'formula', but often used with a broader sense of systematic procedures. It can pertain to scientific, technical, or everyday activities.

• The scientific method is essential in research
• This cooking method ensures even heating

Refers to the way or manner in which someone deals with a situation or problem, often more general and flexible. Suitable for business, personal, or educational contexts.

• Her approach to teaching is very interactive
• We need a new approach to reduce expenses