Classical Physics Forum

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Join expert classical physics discussion on the principles developed before the rise of relativity and quantum mechanics. Including mechanics, electrodynamics, thermodynamics, optics.

Mechanics

I Derivation of Hamilton's Principle: Questions

Optics

B The focal length of the eye and image inversion

Thermodynamics

I Entropy and configurations of microstates

Electromagnetism

A Free surface problem in electrohydrodynamics
I Origin of coordinates in multipole expansion
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I Field Strength of Permanent Magnets -- Inverse square or inverse cube?
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I Calculating Watt Hours for a time interval less than 1 second
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I How to calculate the kinetic energy of an object propelled by a magnet?
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I The difference between calculating energy from 1 vs. 2 magnets?
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I Filling a pool with the hose end above or in the water
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I Variation of the Strength of a Magnetic field?
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I Power done by work on a continuous body isn't the derivative of work?
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I How is the mass of the Earth or the Sun measured?
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I Noether's Theorem for Translation in Field Theory
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I What are the stable orientations for a dipole in an external e-field
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I Some questions regarding Acoustic wave reflection
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I How does pi in physics relate to circular motion and waves?
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I Mathematical disagreement with inverse square law?
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I What happens to X-rays if they do not meet Bragg's law?
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I How do I calculate brake force for an eddy current brake?
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I Regarding noise propagation
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I Gravity at Earth's poles vs equator
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I 2D Ising Model Average Number of Domain Walls
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I Does a component of a vector have components?
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I What is the magnetic equivalent to the Coulomb?
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I Physical Significance of EM Plane Waves?
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I [Q] Lorentz force in momentum conservation view
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I Classical Field Theory - Something isn't clicking
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I Why is saxophone growling produced by modulation of the sound waves?
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I Some notes on stochastic physics
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I Solve equation from dimensional analysis: 3 eq., 6 unknowns
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I Curl of current density
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I Modeling a ferromagnetic core moving inside a solenoid with scipy+FEMM
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I Not a physics major -- Question about how far we can kick an object
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I How will the final output here behave?
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I Noether's theorem for point particles
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I Does a time varying magnetic field in vacuum produce electric field or not?
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I How Could Rarefied Space Matter Affect a Starship's Speed Near a Star?
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I Do electromagnetic waves fade with distance in vacuum?
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I How to calculate the "weight" of this piece of metal?
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I Gas Pressures and the Resistance of Materials (Biodigester Generates Methane)
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I What's the interpretation of the third term F(t)q?
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I I'm calculating more energy out than I put in
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I Rotating plate thrown parallel to ground
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I Light / lumens question about photography exposure times
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I How Does Changing Mass and Spring Force Affect Watch Oscillators?
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I Fluorescent lamps And Fan remote
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I Can Couette Flow with Wavy Plates?
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I Different results for the Range of a projectile
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I Electret with circular electric field
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I A problem regarding power output in cycling
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I Is this analogy between Magnetic Force and Gravitational Force accurate in helping to understand what contributes more to a stronger magnetic force?
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I Can I Apply Voltage to Non-Conducting Plates?
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I Does Pipe Angle Affect Hydrostatic Pressure?
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I What year were Navier-Stokes equations introduced?
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I Producing enough force with a Solenoid
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I Is shear stress at the pipe wall the same for turbulent and laminar flows?
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I Shouldn't the pressure difference along a pipe be a negative number?
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I Claude Naiver work on Navier-Stokes equations
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I Is current truly a scalar quantity or a tensor?
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I How does friction in a pipe occur, with the "no slip condition" ?
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I How to quantify gyroscopic precession torque?
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I Rotational stability and Fosbury Flop questions
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I A Question About the Physical Explanation Behind Torque
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I What is Surface Plasmon Resonance?
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I What are the properties of a Sound Pressure Wave going down into a Cone?
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I Excel projectile trajectory
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I Using a tuning fork vs computer tuner for violin
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I Finding Escape Velocity of mass (m) with electrostatic and gravitational influences
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I RF Power Transfer: Halbach vs. Dipole
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I Why does my ball launcher spin the ball and not launch it (air)?
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I Derivation of Fluid Pressure In A Gravitational Field
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I Directional magnetic field
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I Only one type of elementary electric charge?
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I Plane wave decomposition of the fields of a dipole antenna
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I Origin of Centripetal force when the net force toward the center is 0?
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I Question Regarding Force Being Equal, Even Moving Upwards (if V=0)?
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I Archimedes' principle and the column of water
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I What is the actual definition of the position of an object?
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I Questions about a Laser Interferometer pattern
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I What is the zero point for Potential Energy and how to find it from integral limits?
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I Could vibration carry electricity or something else?
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I What's the physical meaning of Curl of Curl of a Vector Field?
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I Electric Potential in circuit
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I EM field and EM wave
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I Newton's 2nd law for an object in free fall
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I Sun shade on Earth ground, is it a straight line or a curved line?
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I Why Does Differential Pressure Vary As The Square Of The Flow?
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I Frame Transformation in rigid bodies
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I Infinite flow with capillary tubes?
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I Feynman lectures on physics: random walk
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I Is there a way to calculate how rocket exhaust gas spreads out in empty space after leaving the rocket?
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I Dropping an extended Slinky -- Why does the bottom of the Slinky not fall?
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I Green's function boundary conditions
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I Expansion of 1/|x-x'| into Legendre Polynomials
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I How Does Torque Affect Balance on a Self-Balancing Electric Unicycle?
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I Express drag force/acceleration/velocity as function of time
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I Deriving the relativistic rocket equation with exhaust efficiency
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I Fluid dynamics of sailing boat when steering
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I The far reaching ramifications of the work-energy theorem
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I How Does a Polygon Topple Without Sliding or External Force?
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I Lagrangian density of a linearly elastic string under gravity
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I Energy Released From Dropping Things Onto Neutron Stars
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I Where to Find In-Depth Resources on the Physics of CDs/DVDs?
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Classical Physics

Welcome to the Classical Physics forum!

Classical physics refers to the traditional theories and principles of physics developed before the advent of quantum mechanics and relativity in the early 20th century. It includes classical mechanics, electromagnetism, and thermodynamics.

Classical mechanics, formulated by Newton, describes the motion of objects and the forces acting upon them. Maxwell's equations encompass classical electromagnetism, elucidating the behavior of electric and magnetic fields. Thermodynamics, developed by Carnot and others, focuses on the principles governing heat, work, and energy transfer in macroscopic systems.

While highly successful in explaining everyday phenomena, classical physics encountered limitations at extreme scales, leading to the development of quantum mechanics and relativity to describe the behavior of particles at the atomic and cosmic levels, respectively.

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