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
I Understanding the propagation of sound on molecular Scale
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A H-Theorem and Lagrange multipliers
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I Why most probable energy and speed do not correspond?
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I So what are the definitions of gas, liquid, solid?
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The SpaceX Launch and Aftermath
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A Can the orientation of a body be defined by Euler angles?
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A Understanding Free Expansion of Gas: Velocity Distribution Function Evolution
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B Water surface behavior under pressure change
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I Realistic steering wheel angle when car follows points along a path
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B To measure light's frequency, do we interact with each crest + trough?
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B Pressure in a viscous liquid versus non-viscous fluids
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I Lagrangian approach for the inclined plane
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I Understanding Vectors: Magnitude & Direction
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B Some Questions About Drag (for ships in water and airplanes in air)
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I Electrostatic force exerted on an electron inside a nucleus
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I Photoelectric effect: Saturation voltage
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I Tensor Calculus (Einstein notation)
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B Does the inverse square law equalize gravity at different spots?
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A Corresponding case of steady precession but for Tait-Bryan angles
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B Should I use True North or Magnetic North to align my sundial?
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B How Does the Electric Field of a Moving Charge Appear?
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A Are equations of motion invariant under gauge transformations?
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I Can Air Resist a Piston? A Serious Discussion
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I Finding the Axis of Rotation with Given CoG and Force Point
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B Homopolar motor rotation in Vacuum
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B Model rocket physics: Why doesn't the motor go through the nose cone?
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I How do we calculate the energy we used to do something?
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B Understanding air flow and resistance
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A Euler, Tait-Bryan, Tait, proper, Improper
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B How does the density of air affect the note you hear?
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I Car Accident Physics - Are Wheels/Tires Good or Bad Energy Absorbers?
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B How does wind affect a turn for an aircraft?
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B Troubleshooting Battery Internal Resistance Measurements
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B Why use this premise behind the Maxwell-Boltzmann curve?
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B Seeing both B field lines and E field lines at the same time
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A Measurement uncertainty due to thermal noise
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A Forces on rotating disk object
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I Neil DeGrasse Tyson on "sharing water" with historical figures
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B How long does it take to reach harmful CO2 levels in a room?
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A Mass dropped onto rotating disk
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I Rolling Motion direction of Velocity center of mass
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A Virial theorem and translational invariance
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I How can engineers get away with splitting differentials in dynamics?
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B Interpreting light as Maxwell's EM wave
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I Vector calculus: line element dr in cylindrical coordinates
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I Equalizing airflow through multi-hole orifices
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I How Can Two Waves with Different Amplitudes Be in Phase?
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B What is meant by "upper limit of work done on Earth"?
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I Help with Euler Lagrange equations: neighboring curves of the extremum
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Why is Gravitational Force Proportional to Mass Product?
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B How do I calculate the drop force on a cord and eye bolt?
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I Why does ##u## need to be small to represent the Taylor expansion
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A Trig functions and the gyroscope
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I Transmission Line EM Wave vs EM Wave in Free Space
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I Surface area and length (percent increase relationship)
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I Moment of inertia and contact force
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A Conservation Laws from Continuity Equations in Fluid Flow
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I Independence of Trace-Partition function
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B Archimedes Principle - A Rock and Water Magic Trick
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I Magnets, Outer space, and Rings
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A Determination of electron temperature in an ion source
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B How do fields retain their uniformity with interposing objects?
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I At what level will the water settle in this system?
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B Does Mass Matter in Free Fall?
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I Measuring Low Resistance: Why Meter Bridge is the Preferred Choice
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I Pickleball Physics -- Player reaction time vs aging
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I What is the benefit of measuring both direct and reverse current?
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I Thoughts about coupled harmonic oscillator system
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B Negative pressure in a car to power it
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B Is the Definition of Work Done Applicable to Free Fall?
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A Euler vs. Tait (steady precession vs... what?)
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A Radiation back reaction in classical electrodynamics
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I Contemplating Gyroscopic Forces for fighting robot weaponry
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B Air tank PSI and cubic feet calculation help please
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I Equations for Spherical Resonators
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I Velocity of Buoyant Plug in Closed Loop
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I How does the mass of the wheels affect the car's acceleration?
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I Pressure Required to Circulate Liquid in a Closed System?
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I Is Information a conserved quantity or not?
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I Mercury as a plasma at 150 Kelvin
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I Amplitude of the maximums in single slit diffraction
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B How Do Oscillations and Particles Interact in Electromagnetic Fields?
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I Is it possible, that one physics law is "Everything is in motion?"
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B Hydrodynamics Effects: Are They the Same?
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A Macroscopic field - seeking a thorough exposition
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I On whether the motion of a Foucault pendulum bob is comparable to ballistics
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I Wall material effect on Van der Waals gas?
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I Why is Cherenkov radiation blue? And what about refractive index?
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I Understanding Physical Processes: EM, Gravitational, Mechanical & Entropic
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A Steady state confined flow field: Is it cyclic?
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I Don't Ever Mention "Centrifugal Force" to Physicists
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Finding the terminal velocity of a model rocket from a list of velocities
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I Just for fun: treadmill air conditioner efficiency calculation
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I Does the aerial [antenna] not need to be positioned perpendicular?
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I What is the best way to shield / jam ultrasound?
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I Blocking microwave auditory effect / Frey effect?
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I How to Calculate force exerted on a falling body?
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B Leg muscles’ force as a system of levers
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B Simple yet effective way to reliably control the DC Motor speed?
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I Relationship between the Different Frequency vs Decibel Graph Peaks
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