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
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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B Calculation of displacement of an object
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B Do forces of attraction really exist or are they just an illusion?
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I Newton's second law and pressure wave propagation
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I Exact electrostatic potential of a pure dipole using multipole expansion
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I Solving the Block-on-Spring Problem Using Forces
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I When is a water surface not dispersive?
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B Can you turn a skyscraper into a magnet?
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B How is efficiency defined in rocket propulsion?
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I An interesting question from Veritasium on YouTube
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I Understanding the critic of this author for conventional S field
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B Accelerating to a stop in the Milky Way Galaxy
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B Is this determinable? (Size of this Russian patrol boat)
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I Energy flux direction in a conducting wire?
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I Acoustic wave properties and momentum
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B How to find the Moment of Inertia for a Sphero robot?
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I Rigid body mechanics and coordinate frames
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B Hi, I'm learning physics -- Why do things near me not fall toward me?
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B Calculating the Distance that a Catapult can launch a Projectile
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I Measuring Spacing with Shortcut Technique: Is Uniformity Achieved?
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I Impact, momentum, demand and capacity
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A Resonant frequencies of liquid in a cylinder
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I Calculating Candela Power for LED
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Faraday’s law and voltage generation
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I Energy of an electron in an electric circuit
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A Brownian Motion (Langevin equation) correlation function
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A A question about charged particle in a magnetic field
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B What is the relationship between force and distance in planetary motion?
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I Calculating distance (from magnet) to an arbitrary point in 3D space
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I Estimating Vertical Wind Speeds: T_a, T_s, & P_a
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I The meaning and consequences of 'False Pressure'
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I How Fast Can a Magnet Train Go in a Circular Tunnel?
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B Is Infrared Light Invisible to Humans Due to Eye Limitations?
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B How to shoot longer shots in basketball
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I Shallow Water Wave Equation Simulation: Reverse Shoaling?
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I Coleman Lecture: Varying E-M Lagrangian - Problem 3.1 Explained
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A An ab initio Hilbert space formulation of Lagrangian mechanics
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B How is capacitor energy the same as electrostatic potential energy?
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B Understanding the Concept of Infinity as a Reference in Physics: Explained
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B Swimming pool in a rotating space station
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I How to deal with these +- values in an equation?
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B Centrifugal Force on Rotating 4" tire / wheel @ 100mph
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I What happens to the buoyant force at the surface of the water?
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I Compressed gas energy storage formula
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B Does there exist a metal that is 100% unrustable?
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I Calculate the internal pressure of a tube based on flow rate
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I Time derivative of the moment of inertia tensor
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I Are Newton's Laws just definitions?
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I Humming Top Acoustics: Unearthing the Mystery
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I Where to find this uniqueness theorem of electrostatics?
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B How to calculate torque on a body falling freely through the sky?
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B Why does the Sun seem so bright?
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I Uncertainty in an experiment with an image viewed through a big slit
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I Viscous Drag of Water: Effects & Understanding
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I Surface tension and water (the smallest hole water will flow through)
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I Energy emitted by EM sources under constructive interference
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I Equipartition theorem and Drag
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I EM waves have no mass but they do have momentum?
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I Gravity on the Moon vs. on the spinning Earth
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I Damping in a coupled pendulum system
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I Sound Frequency & Pipe Wall Thickness
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B Gravitational Force acting on a massless body
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I Why doesn't the released mass m2 on pulley have higher acceleration?
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I Possibility of PCB Oils in old Diffusion Pumps?
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B What is my apparent weight in water?
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I Reflectivity of Pure Metals in Vacuum
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B Propagation speed of movements of a fluid in a pipe
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B Clarification : S = K ln W and S = K ln omega
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I Did Ohm, Ampere, and Volta Collaborate on Ohm's Law?
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B Fundamental Units and Supplementary Units — What are the differences?
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I Changing the tone of a wind chime using slits or cuts
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I Coefficients in expansions of a vector potential
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B Does Gaining Weight Affect Mass?
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I Can ground albedo near a highway refract noise upward?
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I Projector location in Cinema Theater
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B Question about electromagnetic waves -- Penetration vs. Frequency
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I Open channel flow: derive function for energy slope on friction?
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