"For every action, there is an equal and opposite reaction" - Newton's Third Law of Motion
"Energy can neither be created nor destroyed, only transformed from one form to another" - Law of Conservation of Energy
"The force exerted on an object is equal to its mass times its acceleration" - Newton's Second Law of Motion
"The velocity of an object in motion will remain constant unless acted upon by an external force" - Newton's First Law of Motion
"The rate of change of momentum of a body is directly proportional to the force applied, and occurs in the direction in which the force is applied" - Newton's Second Law of Motion (alternative form)
"The resistance of an object to a change in its state of motion is proportional to its mass" - Newton's Second Law of Motion (alternative form)
"The wavelength of light is inversely proportional to its frequency" - The Wave Equation
"The uncertainty principle states that the position and momentum of a particle cannot both be precisely measured at the same time" - Heisenberg's Uncertainty Principle
"The speed of light in a vacuum is a constant, and is independent of the motion of the source or observer" - Einstein's Theory of Special Relativity
"The total electric charge of an isolated system remains constant" - The Law of Conservation of Electric Charge.
"The gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers" - Newton's Law of Universal Gravitation
"The rate at which work is done is equal to the amount of energy transferred per unit time" - The Work-Energy Principle
"The potential energy of an object in a gravitational field is proportional to its height above a reference point" - The Gravitational Potential Energy Formula
"The amount of heat transferred between two objects is proportional to the temperature difference between them and the thermal conductivity of the material" - Fourier's Law of Heat Conduction
"The pressure of a gas is directly proportional to its temperature and the number of molecules present, and inversely proportional to its volume" - The Ideal Gas Law
"The entropy of a closed system tends to increase over time, resulting in a decrease in available energy" - The Second Law of Thermodynamics
"The resistance of a material is proportional to its resistivity, length, and inversely proportional to its cross-sectional area" - Ohm's Law
"The frequency of a wave is inversely proportional to its wavelength" - The Wave Equation
"The angle of incidence equals the angle of reflection for a ray of light striking a surface" - The Law of Reflection
"The speed of sound in a medium is directly proportional to the square root of its elasticity and inversely proportional to the square root of its density" - The Speed of Sound Formula.
"The electric field at a point is the force per unit charge that a test charge would experience at that point" - Coulomb's Law
"The magnetic force on a charged particle moving through a magnetic field is perpendicular to both the velocity of the particle and the direction of the magnetic field" - The Lorentz Force Equation
"The frequency of a vibrating system is proportional to the square root of its stiffness and inversely proportional to the square root of its mass" - The Frequency Equation for Simple Harmonic Motion
"The acceleration of an object in circular motion is proportional to the square of its speed and inversely proportional to the radius of the circle" - The Centripetal Acceleration Formula
"The energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength" - The Planck-Einstein Relation
"The amount of current flowing through a circuit is directly proportional to the voltage and inversely proportional to the resistance" - The Ohm's Law Equation
"The rate of heat transfer between two objects is directly proportional to the temperature difference between them and the surface area of contact" - The Heat Transfer Equation
"The wavelength of a particle is inversely proportional to its momentum" - The de Broglie Relation
"The energy required to ionize an atom is proportional to its ionization potential" - The Ionization Energy Formula
"The intensity of a sound wave is proportional to the square of its amplitude" - The Intensity Formula for Sound Waves.
"The force on a current-carrying wire in a magnetic field is directly proportional to the current, the length of the wire in the field, and the strength of the magnetic field" - The Force on a Current-Carrying Wire Formula
"The electric potential energy of a point charge in an electric field is proportional to its charge and the potential difference between its initial and final positions" - The Electric Potential Energy Formula
"The resistance of a material increases with temperature due to the increased vibration of atoms and the resulting increase in collisions with electrons" - The Temperature Dependence of Resistance Formula
"The angle of refraction of a ray of light passing from one medium to another is related to the angle of incidence and the indices of refraction of the two media" - Snell's Law
"The pressure of a fluid in a closed system is constant throughout, regardless of the shape of the container" - Pascal's Law
"The efficiency of a machine is the ratio of useful work output to the total energy input" - The Efficiency Formula
"The entropy of a system is proportional to the logarithm of the number of microstates available to it" - Boltzmann's Entropy Formula
"The critical angle of incidence is the angle at which a ray of light passing from a more dense medium to a less dense medium is refracted at an angle of 90 degrees" - Total Internal Reflection
"The energy required to change the temperature of a substance is proportional to its specific heat capacity and the temperature change" - The Heat Capacity Formula
"The period of a pendulum is directly proportional to the square root of its length and inversely proportional to the square root of the acceleration due to gravity" - The Period of a Pendulum Formula.
