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Formulas

Physics

Showing formulas of Physics

Showing 24 of 258 formulas Page 9 of 11

RMS Speed of Gas Molecules

Physics → Thermodynamics → Kinetic Theory of Gases → Molecular Speeds
$$v_{rms} = \sqrt{\frac{3RT}{M}}$$
The square root of the average of the squares of molecular speeds.
📖 Physics 📚 Kinetic Theory of Gases

Law of Equipartition of Energy

Physics → Thermodynamics → Kinetic Theory of Gases → Energy Distribution
$$E = \frac{1}{2} k_B T \text{ per degree of freedom}$$
Total energy is shared equally among all degrees of freedom.
📖 Physics 📚 Kinetic Theory of Gases

Simple Harmonic Motion (Displacement)

Physics → Oscillations → Oscillations → SHM
$$x = A \sin(\omega t + \phi)$$
Equation describing the position of a particle in SHM.
📖 Physics 📚 Oscillations

Time Period of Spring-Mass System

Physics → Oscillations → Oscillations → SHM Examples
$$T = 2\pi \sqrt{\frac{m}{k}}$$
Time period of a mass $m$ oscillating on a spring of constant $k$.
📖 Physics 📚 Oscillations

Speed of Sound in Solids

Physics → Waves → Waves → Sound Waves
$$v = \sqrt{\frac{Y}{\rho}}$$
Velocity of longitudinal waves in a long solid rod.
📖 Physics 📚 Waves

Newton-Laplace Equation (Sound in Gas)

Physics → Waves → Waves → Sound Waves
$$v = \sqrt{\frac{\gamma P}{\rho}}$$
Corrected speed of sound in a gas considering adiabatic conditions.
📖 Physics 📚 Waves

Power (Instantaneous)

Physics → Mechanics → Work, Energy, and Power → Power
$$P = \vec{F} \cdot \vec{v}$$
The rate of doing work expressed as the dot product of force and velocity.
📖 Physics 📚 Work, Energy, and Power

Viscosity (Newton's Law)

Physics → Properties of Matter → Mechanical Properties of Fluids → Viscosity
$$F = -\eta A \frac{dv}{dx}$$
Viscous force between fluid layers is proportional to area and velocity gradient.
📖 Physics 📚 Mechanical Properties of Fluids

Pressure in a Fluid Column

Physics → Properties of Matter → Mechanical Properties of Fluids → Hydrostatics
$$P = P_0 + \rho gh$$
Total pressure at a depth $h$ in a static fluid.
📖 Physics 📚 Mechanical Properties of Fluids

Work Done in Stretching a Wire

Physics → Properties of Matter → Mechanical Properties of Solids → Elasticity
$$W = \frac{1}{2} \times \text{Stress} \times \text{Strain} \times \text{Volume}$$
Energy stored in a wire when stretched within elastic limit.
📖 Physics 📚 Mechanical Properties of Solids

Escape Velocity from Earth surface

Physics → Mechanics → Gravitation → Gravity
$$v_e = \sqrt{2gR}$$
Minimum velocity required to escape Earth's gravity.
📖 Physics 📚 Gravitation

Variation of g with Altitude

Physics → Mechanics → Gravitation → Gravity
$$g_h = g\left(1 - \frac{2h}{R}\right)$$
How gravity decreases as you move above Earth's surface.
📖 Physics 📚 Gravitation

Torricelli's Law (Efflux Speed)

Physics → Properties of Matter → Mechanical Properties of Fluids → Fluid Dynamics
$$v = \sqrt{2gh}$$
Speed of efflux of liquid from an orifice.
📖 Physics 📚 Mechanical Properties of Fluids

Mirror Formula

Physics → Optics → Light - Reflection and Refraction → Spherical Mirrors
$$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$$
Relates object distance, image distance, and focal length of a spherical mirror.
📖 Physics 📚 Light - Reflection and Refraction

Magnification (Mirror)

Physics → Optics → Light - Reflection and Refraction → Spherical Mirrors
$$m = \frac{h'}{h} = -\frac{v}{u}$$
The ratio of the height of the image to the height of the object.
📖 Physics 📚 Light - Reflection and Refraction

Refractive Index (Speed of Light)

Physics → Optics → Light - Reflection and Refraction → Refraction
$$n = \frac{c}{v}$$
Ratio of the speed of light in vacuum to the speed of light in a specific medium.
📖 Physics 📚 Light - Reflection and Refraction

Electric Current

Physics → Electricity → Electricity → Current
$$I = \frac{Q}{t}$$
The rate of flow of electric charge through a conductor.
📖 Physics 📚 Electricity

Potential Difference

Physics → Electricity → Electricity → Potential
$$V = \frac{W}{Q}$$
Work done to move a unit charge from one point to another.
📖 Physics 📚 Electricity

Resistivity

Physics → Electricity → Electricity → Resistance
$$R = \rho \frac{l}{A}$$
Resistance depends on the material, length, and area of the conductor.
📖 Physics 📚 Electricity

Joule's Law of Heating

Physics → Electricity → Electricity → Heating Effect
$$H = I^2Rt$$
Heat produced in a resistor is proportional to square of current, resistance, and time.
📖 Physics 📚 Electricity

Electrical Energy

Physics → Electricity → Electricity → Energy Consumption
$$E = P \times t$$
Total energy used over a period of time.
📖 Physics 📚 Electricity

Speed

Physics → Mechanics → Motion → Kinematics
$$v = \frac{s}{t}$$
Rate of change of distance.
📖 Physics 📚 Motion

Acceleration

Physics → Mechanics → Motion → Kinematics
$$a = \frac{v - u}{t}$$
Rate of change of velocity with respect to time.
📖 Physics 📚 Motion

Weight

Physics → Mechanics → Gravitation → Gravity
$$W = mg$$
Force with which Earth attracts an object.
📖 Physics 📚 Gravitation
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