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

B Average velocity as a weighted mean

Optics

B The focal length of the eye and image inversion

Thermodynamics

I Entropy and configurations of microstates

Electromagnetism

I Why measure the speed of light in one direction?
I Angular momentum and turning a bicycle
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I Understanding Sound Waves in Fluids: Pressure and Velocity Fields
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I Is there an integral version of Newton's law of gravity?
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B How to use Refrigerators/AC in efficient manner so that it remains cool inside?
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I Understanding Classical Mechanics: Acceleration
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I Bernoulli's equation and the work energy theorem
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I Does Ohm's Law work for Light Bulbs?
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I Electromagnetic effects in the brain
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I The Curious Case of The Impotent Magnets
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I Can a Core-less Dynamo Really Achieve Double Efficiency?
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I Solar system simulation errors
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I Hydrostatics: Pascal's principle and ocean depth
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B Question about collisions -- Knife point piercing a ball of clay
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I How Does Non-Stretchy Mat Material Affect Trampoline Performance?
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B Proof of the existence of atoms
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I How Does Centrifugal Force Affect Objects on a Rotating Disk?
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I Kepler's second law derivation from angular momentum conservation
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I Why do we still say “the speed of light” instead of “c”?
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I Off center torque applied to a rotating body
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B Angled Rod w Float Attached -- Force of Float
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I Understanding relative friction
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I Friction of a rolling cylinder on an incline
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I Does gravitational energy travel like electrical energy?
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I "A system tries to minimize total potential energy"
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I Does dividing maximum frequency by sound frequency give accurate velocity?
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I Summing linear momentum in circular rotation
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I Understanding the physics behind a Solenoid Valve
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I Calculating Hydrostatic Force on valve cavity in a Solenoid Valve
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B A friend of mine sent me these pictures showing multiple shadows
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I Propagation of Errors, Ohm's Law
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I Demo of spinning object flipping its axis (intermediate axis theorem)
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I What is the Order of Integration in a Double Integral?
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A Model the pressure of a zero-gravity simple fluid system
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B Swimming at the Same Reynolds Number as Sperm: A Reflection on Purcell's Talk
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Why do we assume harmonic time dependence in wave equation solutions?
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I Time of flight measurement uncertainty
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I Weak principle of equivalence (Galileo, Newton)
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I Reasoning for circular/elliptical orbits
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B Confusion when considering pV=nRT in Two Balloon experiment
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B A flip of the Earth on its axis
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I Blackbody radiation and the cosmic microwave background
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I Effective weight vs distance to the point of attachment of the weight
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B Can nuclear bomb(s) change trajectory of small black hole?
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I Which units is this conversion factor for (molar volume)? 0.023901488
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I Formula for Doppler effect in moving medium?
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I Shock Load on Rope: Weight Limit Analysis
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I Does Space Curvature Account for Gravity Between Individual Atoms?
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I Dust sticking to fan blade downstream of rivet head
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I Why does hot air have low pressure? (wind formation)
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I Gravitational potential energy
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Insights How to Model a Magnet Falling Through a Conducting Pipe
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I The different generators of canonical transformations
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I What Explains the Paradox of Mechanical Energy Conservation?
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I Gravitational potential of an ellipsoid
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I Calculating your weight in an elevator
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I Why didn't the wrecking ball smash his head?
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I Gas molecular attraction in the sense of Newton's law
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I Brownian motion and continuity
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B Why is sea surface water relatively constant?
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B Newton's third law (equal and opposite force)
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I How Does Angular Velocity Affect Instantaneous Acceleration in Rotating Systems?
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I Acceleration as a Function of Time Using Constant Power
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B Resonance state - Alternating current
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I Hamiltonian formalism and partition function
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I Using Dimensional Analysis to derive an equation (Walter Lewin video)
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I Damped oscillator with changing mass
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I What Direction Do Sparks Travel from Steel-on-Steel Friction in Railroad Wheels?
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I Designing an Invariant Lagrangian: Rules and Considerations
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I Velocity for uniform circular motion
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I Converting Units: How to Convert 1.6*10^7 N/cm^2 to kg/cm^2
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I Topics covered in John R Taylor Classical mechanics
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Insights How to Model a Magnet Falling Through a Solenoid
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I G-force centrifuge mounted on opposite rotating platform
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I Physics behind making a mango milk shake
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B Potential energy and lifting an object vertically
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B Ideal gas formula not working?
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B The relationship between mass, light and energy
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I Question about X-ray power emitted by the Coolidge tube
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I What is the relationship between force and potential in particle interactions?
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B Algebraic Operations on Energy-Momentum Relationships
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B What is the analogy for EM waves traveling in vacuum?
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I Measuring the built-in potential of a pn junction
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I EM wave propagation: respective phase of E and M field
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I A gravity conundrum involving a solid cylinder
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I A Report on the Experimental Results of Inertial Effects
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B Artificial gravity rotating on two axes
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I Does high humidity air transfer sound better than dry air?
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I Does an inductor always create a back EMF?
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I Does pressure affect the thermal breakdown of water?
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I Reverse Projector: New Tech for Immersive Video Experience
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B Letter reflection from beer can
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B How does the size of pool balls affect the amount of force needed for a shot?
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I How to account for linear momentum in a collision?
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I How Does Rotating Polarization Work in Optics Experiments?
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I Relative Strength of the Magnus effect relative to gravity
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I Can Self-Running Heat Pumps Revolutionize Home Efficiency?
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I Are spherical transverse waves exact solutions to Maxwell's equations?
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I Is E/B = c for spherical EM Wave in Vacuum?
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I Solving the EM field equations to produce the desired vector field
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B What are the energy conservation principles at play in a catapult launch?
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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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