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16 results for “psi”

Formulae (16)

Gauss's Law

\oint \vec{E} \cdot d\vec{A} = \frac{Q}{\varepsilon_0}

Electric flux through a closed surface is proportional to the enclosed charge.

Physics Laws & TheoremsAdvanced

Faraday's Law of Induction

\varepsilon = -\frac{d\Phi_B}{dt}

A changing magnetic flux induces an electromotive force.

Physics Laws & TheoremsAdvanced

Lenz's Law

\varepsilon \propto -\frac{d\Phi_B}{dt}

Induced current opposes the change in flux that produced it.

Physics Laws & TheoremsAdvanced

Faraday Law of Induction

\varepsilon = -\frac{d\Phi_B}{dt}

A changing magnetic flux induces an EMF.

Electricity & MagnetismAdvanced

Gauss's Law

\Phi_E = \frac{Q_{enc}}{\varepsilon_0}

Electric flux through a closed surface.

Electricity & MagnetismAdvanced

Parallel-Plate Capacitance

C = \frac{\varepsilon_0 A}{d}

Capacitance from plate area and separation.

Electricity & MagnetismAdvanced

EM Energy Density

u = \tfrac{1}{2}\varepsilon_0 E^2 + \frac{B^2}{2\mu_0}

Energy stored per unit volume in EM fields.

Electricity & MagnetismAdvanced

Speed of Light (EM)

c = \frac{1}{\sqrt{\mu_0 \varepsilon_0}}

Light speed from vacuum constants.

Modern & Quantum PhysicsAdvanced

Schrödinger (Time-Independent)

\hat{H}\psi = E\psi

Fundamental equation of quantum mechanics.

ChemistryAdvanced

Beer–Lambert Law

A = \varepsilon l c

Absorbance of light by a solution.

EngineeringBasic

Strain

\varepsilon = \frac{\Delta L}{L_0}

Relative deformation of a material.

EngineeringIntermediate

Young's Modulus

E = \frac{\sigma}{\varepsilon}

Stiffness of a material (stress over strain).

Materials & CivilBasic

Strain

\varepsilon = \frac{\Delta L}{L_0}

Fractional deformation under load.

Materials & CivilIntermediate

Young Modulus

E = \frac{\sigma}{\varepsilon}

Ratio of stress to strain; measures material stiffness.

Unit ConversionsBasic

Bar to PSI

\text{psi} = \text{bar} \times 14.5038

Convert bar to pounds per square inch.

Number TheoryAdvanced

Binet Formula

F_n = \frac{\varphi^n - \psi^n}{\sqrt{5}}

Closed form for the nth Fibonacci number.