Science.
Understand the ideas of physics, chemistry, and mathematics through articles, concepts, and examples connected to their sources.
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Energy
A quantity that makes it possible to describe and account for physical transformations.
Explore this reference Concept · PhysicsPower
The rate at which energy is transferred or transformed.
Explore this reference Concept · ChemistryIon
An atom or group of atoms with a net electrical charge.
Explore this reference Concept · ChemistryRedox reaction
Transformation involving changes in oxidation states.
Explore this reference Concept · PhysicsWave
A disturbance whose propagation makes it possible to transmit signals and energy.
Explore this reference Concept · PhysicsFrequency
Number of repetitions of a periodic phenomenon per unit of time.
Explore this reference Concept · PhysicsWavelength
Distance between consecutive points on a wave that are in the same phase.
Explore this reference Concept · PhysicsAmplitude
Maximum value of a variation relative to equilibrium in a defined oscillation.
Explore this reference Concept · PhysicsPropagation medium
A material system whose interactions transmit a mechanical disturbance.
Explore this reference Concept · MathematicsArithmetic mean
The sum of the values in a set divided by its number of observations.
Explore this reference Concept · MathematicsMedian
A measure of center that divides ordered data into two halves.
Explore this reference Concept · MathematicsStandard deviation
Measure of dispersion expressed in the same units as the data.
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