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
Confirm my reasoning on a generating function proof
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Choked flow out of air compressor and wind tunnels
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Supersonic wave and distance calculation
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How much an unsealed piston will compress air
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Condition for Phase transition
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Poisson equation with a dirac delta source.
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How to calculate distance required for observable difference
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Why is D'Alembert's Principle stated in terms of virtual displacements?
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What does it mean to "minimise" an action ?
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How can the Doppler equation be rearranged to solve for other variables?
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Causality of the wave equation
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Deriving Torricelli's equation using calculus
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Integral form of Poisson's equation
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Volume elements of phase space
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The Role of Hamiltonian Time Dependence in Energy Conservation
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Accuracy Defined: What Does 10% Mean?
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Dimension change of opening through concrete slab expansion
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Insights Frequently Made Errors in Equation Handling - Comments
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How to calculate the precession
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Understanding Tidal Forces on a Sphere: Do They Also Act Horizontally?
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Insights A Partial "Derivation" of Gauss's Law - Comments
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Gravitational Force of an object
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Huygens principle at the boundary of a volume
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Precession: A picture using only forces
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Why massless rope is required for making these two forces eq
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Orbiting Eternally: Physics Q&A with Steven
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What is the physical significance of Poisson brackets?
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How to determine shape of surface of a fluid?
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What affects the linear mass density of a string?
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What makes phase space special?
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Are Time Periods of Combined Vibrations Always Commensurable?
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Compressibility factor and van der Waals equation for temp
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Connection in parallel/series?
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Action integral: Just a constant?
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Drumstick Rebound: Physics Behind Stick Stroke & Rotation Point
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Can understanding physics improve my trampolining skills?
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Sphere on a Flat Plane: 3 Points of Contact?
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Switching between distance variables in a simple seismograph
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Cofactor Matrix Confusion: Solving for Minor Determinants
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Understanding Resonance: Causes and Effects Explained
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Calculation of Counterbalance Mass
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Derivation of coloumbs law without Gauss's law
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Confused about short circuit and open circuit
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Why can the Jacobian represent transformations?
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How Can Understanding Basic Physics Concepts Improve Everyday Problem Solving?
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Am I doing this right? The Boxers punch (not for school)
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How does gas behave/flow in different sized tubing/piping?
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Calculating the force required to topple an object?
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Are external and internal forces distinct in their effects on objects?
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The Current Load: Why Do Two Diodes in Parallel Not Share It?
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Coloumbs constant's derivation
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Waves traveling in all directions
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Aluminium oxide surface and conductivity?
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Laminar and turbulent flow, the liquid or object?
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How to drop terms in a Lagrangian?
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Can Huygens Principle Be Applied to Waves on a String with Fixed Ends?
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What causes waves to dissipate in different mediums?
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Why do geosynchronous satellites have to orbit above the Equator?
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Why do some countries use 110V 60Hz and others use 220V 50Hz for electricity?
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Why Hot Air Rises and Cold Air Sinks: Understanding Air Density
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Why Does the Lagrangian Depend on Time and Position?
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Does a Static Charge and Magnetic Dipole Create Non-Zero Energy Flow?
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Are density and resistivity proportional?
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Can Wien's Law be derived without using Planck's formula?
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Green's function + method of images
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Derive equation for Energy of the Harmonic Oscillator
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Are Constraints Necessary in Hamiltonian Dynamics?
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Lagrangian invariance, short question
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Lack of physical understanding of Noether's theorem
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Dynamic soaring update - 505 mph
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Griffith's E&M: Why is V_0(y) Missing from Equation 3.28?
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Hamiltonian Method: Getting Final Equation of Motion
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Chaos Theory and the Prolate Spheroid
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The History of Ticker Timers in Physics Experiments
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Question about "bound systems"
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Confusion about EM Transmission coefficient - critical angle
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How do I correctly derive the formula d = vt + 1/2 at^2?
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How to Determine ΔU in Expanding Systems with Changing Pressure?
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Path of the end of a string wrapping around cylinder
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Scaling Interpretation for 2-D Continuity PDE: What Does UH/L Represent?
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Why does gravity decrease at the equator ?
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Why is silver the best conductor?
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Can I substitute the new coordinates in the old hamiltonian?
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Do the Euler-Lagrange equations hold for a time-dependent V?
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Point of application of generalized forces of constraint
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Hookes law for stress and strain
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Obtain Equation Using Hamilton's Principle
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Stress tensor from action in Landau-Ginzburg field theory
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E-L equations only hold for independent variables?
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Material Derivative (Convective Derivative Operator)
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How can I know when the Lagrange multiplier is a constant?
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Green's function? Physical interpretation?
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Understanding Equations in Classical Physics: Force, Motion, and Acceleration
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Thought problem: torpedo with a drill
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Why does pressure drop in the narrow portion of the Venturi effect?
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Question about the KAM theorem
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