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 Is calling fictitious forces "not real" just about terminology?

Optics

I How do I stretch a laser from a beam into a sheet?

Thermodynamics

I What thermal cycle would describe the action of a candle carousel?

Electromagnetism

A Reflections at the source point of a transmission line
A Non commutator of symmetries giving rise to a gauge symmetry
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B Simulate an altitude at 16000-18000 feet with water depth
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I Influence of electron's kinetic energy disspation during photoelectric emission
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I Origin of coordinates in multipole expansion
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A Order of Galilean Boost / Translation on a wave-function (or fields)
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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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B Friction forces on the tires of a moving car
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A Inconsistency between definitions of power and work in continuum mechanics?
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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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B 4 pounds over the weight limit of a tv stand
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B Why Does the Speed of Light Max Out at 186,282 Miles Per Second?
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B Electric cars: Could the rotation of tires be used to generate electricity and lengthen range?
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Question About Ideal Gas and Average Free Movement of Molecules
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I Noether's Theorem for Translation in Field Theory
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B Is this equation at all sensical?
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I What are the stable orientations for a dipole in an external e-field
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A Various questions on Galilean group (boosts and spatial translations)
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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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B What happens to the energy in destructive interference?
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How to interpret the difference in height between two people in this Ames room?
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Momentum question: Object dropped onto a moving railcar
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B Tangential Velocity (maybe)
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B Can Ionic Compounds conduct electricity in a gaseous state?
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I What happens to X-rays if they do not meet Bragg's law?
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B The power output of a vehicle when descending hills
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I How do I calculate brake force for an eddy current brake?
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B Why does my LC circuit not oscillate its energy between Electric & Magnetic fields?
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B Newton's Third Law Question -- Does the Earth Do Work on Me?
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B Confusion about Wave Motion
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I Regarding noise propagation
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I Gravity at Earth's poles vs equator
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A How to intuitively think of translations and Galilean boosts commuting?
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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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A Mass measurement in a Penning trap
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I What is the magnetic equivalent to the Coulomb?
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Sealing vacuum chamber holes air tight
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I Physical Significance of EM Plane Waves?
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B Stopping power of rifle slugs
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A Euler Lagrange Equations for simple multi-body systems
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I [Q] Lorentz force in momentum conservation view
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A Is a diffuse scatterer necessarily a Lambertian emitter?
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I Classical Field Theory - Something isn't clicking
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B Questions about Noether's theorem -- Conservation of Energy and Mass
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I Why is saxophone growling produced by modulation of the sound waves?
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B Does the shape of an object affect the pressure?
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I Some notes on stochastic physics
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B My head spins when I think about time
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B How to Fulcrum weigh camper trailer on bathroom scales?
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B Compressive force of a shorter cylindrical bone vs a longer one
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B Curious about the uniform electric field between metal plates
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B Rubber Bands & Paper Attraction
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I Solve equation from dimensional analysis: 3 eq., 6 unknowns
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B Trying to understand hydrostatic pressure
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I Does Current Density Decay to Zero at Vortex Centers in 2D Systems?
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B Why doesn't a charged particle moving at a constant speed radiate?
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B Trying to understand hydrostatic pressure with different vessel widths
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I Modeling a ferromagnetic core moving inside a solenoid with scipy+FEMM
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A Electric and magnetic field lines in a plane wave of finite extent
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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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B If the source of the pressure distribution around a lifting airfoil is known, why is not explained in textbooks?
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A Electron drift velocity in a gas discharge
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I Noether's theorem for point particles
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B Vacuum surface area balance and force
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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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A Energy transfer with current in a dielectric
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B Fully submerged block in a pool of water
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B I have a doubt about the pressures at the same level of fluids
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B Can sound travel through clay?
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B Torsion Involving an Off Axis Thrust
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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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A Thermal stresses in the stress tensor
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B The inverse-square law: Gravitational force on two falling marbles
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A What Is the Expression for Settling Velocity in a Rotating Field?
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B Speed vs. time for our Galaxy and an Observer
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I Rotating plate thrown parallel to ground
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B Magnet inside a solenoid with current
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I Light / lumens question about photography exposure times
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B Electric field on the equatorial line of a dipole
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B Rolling Without Slipping on an Inclined Plane
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B Electric Field Inside a Hollow Sphere
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A Eigenvectors of the Permittivity Tensor in Periodic Dielectrics
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B Is there any physics topic explaining how objects break into parts?
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B How is the magnet being affected in this diamagnetic application?
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B Force required to stretch training resistance bands
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I How Does Changing Mass and Spring Force Affect Watch Oscillators?
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