Examples for

Physical Quantities

From energy to momentum to magnetic field strength, Wolfram|Alpha has the world's most complete database of computable physical quantities. Query for common notations, basic dimensions, standard units and alternate terminology for thousands of physical quantities using Wolfram|Alpha. Obtain additional information on dimensionless quantities and compute dimensionless combinations of physical quantities.
Physical Quantities

Retrieve detailed data on physical quantities.

Get information about a physical quantity:

mass density
energy
enthalpy
vibration strain gauge factor
reluctivity
magnetic memristance
retroreflection coefficient
logarithmic sound pressure level
Seebeck coefficient

Compare physical quantities:

magnetic induction, magnetic field strength
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Dimensionless Quantities

Explore dimensionless quantities that are used in many fields, including mathematics, economics, engineering and physics.

Compute a dimensionless quantity:

Reynolds number
Eckert number
Brinkman rheological number formula

Compute a dimensionless quantity with specified values:

Arrhenius number 300C, 84kJ/mol
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Dimensional Analysis

Calculate dimensionless combinations of physical quantities.

Compute dimensionless combinations:

force, mass, acceleration
energy, time, length, density

Get information about a theorem in dimensional analysis:

Buckingham pi theorem
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