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Classical Physics Forum

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?

Yesterday, 3:16 AM

Optics

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

Today, 12:04 AM

Thermodynamics

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

Yesterday, 1:51 PM

Electromagnetism

A Reflections at the source point of a transmission line

Oct 31, 2025

Filters

Sun vs Moon Tides: Understanding the Forces Behind Sea Tides

May 30, 2011 · Replies 21 · Jun 4, 2011

Replies: 21

Views: 4K

Object at Beaker Base: Upthrust or Not?

Jun 2, 2011 · Replies 1 · Jun 3, 2011

Replies: 1

Views: 1K

Mass Air Bubble: Negative Effects in Material Medium

Jun 2, 2011 · Replies 3 · Jun 3, 2011

Replies: 3

Views: 5K

Using divergence theorem to prove Gauss's law

Jun 1, 2011 · Replies 10 · Jun 2, 2011

Replies: 10

Views: 8K

What is the minimum PE gained by a string hanging over the edge of a table?

Jun 2, 2011 · Replies 5 · Jun 2, 2011

Replies: 5

Views: 2K

Inflating Tyres: Is it Possible to Make Them Lighter?

Jun 1, 2011 · Replies 4 · Jun 1, 2011

Replies: 4

Views: 2K

Is the Navier-Stokes Equation Solvable?

May 31, 2011 · Replies 4 · Jun 1, 2011

Replies: 4

Views: 2K

Why Earth is Bulged at the Equator

May 31, 2011 · Replies 9 · Jun 1, 2011

Replies: 9

Views: 3K

Solid Angle of the Sun Derivation

May 15, 2009 · Replies 4 · May 30, 2011

Replies: 4

Views: 30K

Energy savings with space elevator

May 30, 2011 · Replies 4 · May 30, 2011

Replies: 4

Views: 2K

Solving a Displacement-Time Graph with Sharp Turnings

May 30, 2011 · Replies 3 · May 30, 2011

Replies: 3

Views: 2K

Legendre Transformation of the Hamiltonian

May 29, 2011 · Replies 6 · May 30, 2011

Replies: 6

Views: 3K

Satellite Burning: Why Does It Occur?

May 29, 2011 · Replies 2 · May 29, 2011

Replies: 2

Views: 2K

Does Centripetal Acceleration Increase Kinetic Energy in a Mass Spectrometer?

May 28, 2011 · Replies 8 · May 29, 2011

Replies: 8

Views: 2K

Can there be a material with relative permittivity < 1?

Apr 22, 2011 · Replies 1 · May 29, 2011

Replies: 1

Views: 14K

Doubt on this problem from David Morin's book - Intro to Classical Mech

May 28, 2011 · Replies 6 · May 29, 2011

Replies: 6

Views: 4K

How do I derive viscosity equation

Mar 28, 2011 · Replies 3 · May 28, 2011

Replies: 3

Views: 5K

Goldstein's derivation of E-L equations from D'Alembert

May 27, 2011 · Replies 4 · May 28, 2011

Replies: 4

Views: 3K

Spherical aberration in high NA objectives

May 27, 2011 · Replies 3 · May 28, 2011

Replies: 3

Views: 4K

Could someone please explain the geometrization process?

May 27, 2011 · Replies 8 · May 28, 2011

Replies: 8

Views: 3K

What does Poynting Theorem reveal about electrodynamic losses?

May 26, 2011 · Replies 3 · May 27, 2011

Replies: 3

Views: 3K

Understanding Fluids: The Weight of Steel Balls in Alcohol and Oil

Mar 26, 2008 · Replies 14 · May 27, 2011

Replies: 14

Views: 8K

Inertia on Planes: Pressure Differences Inside?

May 26, 2011 · Replies 3 · May 27, 2011

Replies: 3

Views: 2K

Seebeck Effect a bit of a puzzler

Oct 13, 2005 · Replies 2 · May 27, 2011

Replies: 2

Views: 4K

Connection between precession and resonance frequencies?

May 20, 2011 · Replies 2 · May 26, 2011

Replies: 2

Views: 3K

Physical explanation of Kronig-Kramers application

May 26, 2011 · Replies 2 · May 26, 2011

Replies: 2

Views: 7K

Fourier Transform of a Square Annulus

May 26, 2011 · Replies 5 · May 26, 2011

Replies: 5

Views: 4K

Derivative in cylindrical coordinates.

May 25, 2011 · Replies 6 · May 26, 2011

Replies: 6

Views: 5K

Gain of an NPN Transistor: Understanding Ic/Ib

May 26, 2011 · Replies 1 · May 26, 2011

Replies: 1

Views: 2K

Can you harvest a sails energy withouth movement?

May 17, 2011 · Replies 2 · May 26, 2011

Replies: 2

Views: 2K

Non-Linear Oscillator: Understand & Determine Ring Pendulum

May 25, 2011 · Replies 2 · May 26, 2011

Replies: 2

Views: 4K

Why doesn't resonance result in infinite energy transfer?

May 23, 2011 · Replies 13 · May 26, 2011

Replies: 13

Views: 4K

Can a Commercial Airplane Takeoff During Landing in Casino Royale?

Nov 18, 2006 · Replies 39 · May 26, 2011

2

Replies: 39

Views: 12K

Is There Heat Transfer in a Stirling Engine's Constant Volume Process?

May 25, 2011 · Replies 1 · May 25, 2011

Replies: 1

Views: 3K

Which is the proper formula for mag-monopoles attraction?

May 25, 2011 · Replies 3 · May 25, 2011

Replies: 3

Views: 2K

Usually when I don't know what something is, I look it up, then I

May 24, 2011 · Replies 9 · May 25, 2011

Replies: 9

Views: 2K

Mean free path in units g/cm^2

May 22, 2011 · Replies 1 · May 23, 2011

Replies: 1

Views: 4K

How does symmetry affect the shell theorem?

May 22, 2011 · Replies 1 · May 22, 2011

Replies: 1

Views: 3K

Degree of Freedom for Rigid Body & Rotating CD

May 18, 2011 · Replies 10 · May 22, 2011

Replies: 10

Views: 4K

Calculating an equations error given the error of a single value

May 20, 2011 · Replies 3 · May 21, 2011

Replies: 3

Views: 4K

Understanding the Center of Mass in a Hemispherical Bowl in Equilibrium

May 20, 2011 · Replies 2 · May 20, 2011

Replies: 2

Views: 3K

Which Formulas have this format?

Apr 2, 2011 · Replies 3 · May 20, 2011

Replies: 3

Views: 2K

Vector calculus question regarding helmholtz theorem

May 19, 2011 · Replies 2 · May 19, 2011

Replies: 2

Views: 3K

What Textbooks Cover the Boltzmann Transport Equation in Statistical Mechanics?

May 19, 2011 · Replies 3 · May 19, 2011

Replies: 3

Views: 4K

What is the significance of the wavevector in optics and k-space?

Jul 3, 2008 · Replies 8 · May 18, 2011

Replies: 8

Views: 49K

How Can Box2D and ActionScript 3.0 Simulate a Galton Board with Colliding Balls?

May 17, 2011 · Replies 2 · May 18, 2011

Replies: 2

Views: 2K

Centrifugal Pumps & Blowers: Why Prime Pumps not Blowers?

May 17, 2011 · Replies 8 · May 18, 2011

Replies: 8

Views: 3K

Why is any wave defined by the wavelength, but not by the amplitude?

May 9, 2011 · Replies 4 · May 17, 2011

Replies: 4

Views: 2K

B and H field for a long rod and a disk

May 13, 2011 · Replies 6 · May 17, 2011

Replies: 6

Views: 3K

Understanding Degrees of Freedom in Calculating Molecule Kinetic Energy

May 15, 2011 · Replies 8 · May 17, 2011

Replies: 8

Views: 18K

What are the toughest physics exercise books?

May 16, 2011 · Replies 1 · May 16, 2011

Replies: 1

Views: 7K

Combustion explained by physics

May 16, 2011 · Replies 9 · May 16, 2011

Replies: 9

Views: 4K

How Is Trigonometry Used to Calculate Forces on an Arrow's Bottom Beam?

May 16, 2011 · Replies 3 · May 16, 2011

Replies: 3

Views: 3K

Invisibility cloak possible? how close are we?

Mar 3, 2010 · Replies 13 · May 15, 2011

Replies: 13

Views: 5K

Anyone else enjoy physics less after learning QM?

May 15, 2011 · Replies 1 · May 15, 2011

Replies: 1

Views: 2K

Does Gauss' law imply that the universe isn't compactified?

May 14, 2011 · Replies 5 · May 15, 2011

Replies: 5

Views: 2K

Hey there,I've been learning about AC circuits recently and while

May 13, 2011 · Replies 6 · May 14, 2011

Replies: 6

Views: 2K

Gravity Revisited: Earth-Moon & Earth-Sun Comparisons

May 10, 2011 · Replies 35 · May 13, 2011

2

Replies: 35

Views: 4K

Young's Double Slits - Derivation & Formula

May 13, 2011 · Replies 2 · May 13, 2011

Replies: 2

Views: 2K

How does energy transmission work in waves?

May 9, 2011 · Replies 4 · May 13, 2011

Replies: 4

Views: 7K

Few question in retarded fields E and B

May 13, 2011 · Replies 1 · May 13, 2011

Replies: 1

Views: 2K

Analyzing the Movement of a Bicycle (requesting feedback)

May 10, 2011 · Replies 2 · May 12, 2011

Replies: 2

Views: 3K

How does analog video acquisition work?

May 10, 2011 · Replies 4 · May 12, 2011

Replies: 4

Views: 2K

Understanding the Concept: Unchangeable Models

May 12, 2011 · Replies 2 · May 12, 2011

Replies: 2

Views: 4K

Plane Waves and the Poynting Vector

Jan 15, 2011 · Replies 5 · May 12, 2011

Replies: 5

Views: 6K

Evanescent waves, wavevector, and Poynting vector

May 3, 2011 · Replies 3 · May 12, 2011

Replies: 3

Views: 8K

Function for (damped) SHM as a linear combination of two exponentials

May 12, 2011 · Replies 1 · May 12, 2011

Replies: 1

Views: 3K

How Does Retarded Time Change Between Static and Moving Charge Distributions?

May 11, 2011 · Replies 1 · May 12, 2011

Replies: 1

Views: 3K

Solving Balance Scale Math: X vs Y Weight Difference

May 11, 2011 · Replies 1 · May 12, 2011

Replies: 1

Views: 5K

Two standing waves forming a traveling wave

May 11, 2011 · Replies 2 · May 11, 2011

Replies: 2

Views: 5K

Physics of a satellite orbiting the sun

Apr 29, 2011 · Replies 10 · May 11, 2011

Replies: 10

Views: 4K

Understanding Energy Equations: Mass, Gravity & Velocity

May 10, 2011 · Replies 1 · May 10, 2011

Replies: 1

Views: 2K

Physical interpretation of the Hamiltonian

May 9, 2011 · Replies 3 · May 10, 2011

Replies: 3

Views: 5K

How Does Temperature Affect Dissolved Gas in Beer?

Dec 6, 2010 · Replies 7 · May 10, 2011

Replies: 7

Views: 3K

Simple application of euler-lagrange equation

May 9, 2011 · Replies 5 · May 9, 2011

Replies: 5

Views: 3K

What Is the Hamiltonian for a Wire Coil Under Reflection Transformation?

May 8, 2011 · Replies 2 · May 9, 2011

Replies: 2

Views: 2K

How much more energy does it take to melt circular glass that is half the size?

May 6, 2011 · Replies 3 · May 9, 2011

Replies: 3

Views: 3K

Energy Source of E Field in Decay of Neutral Pi Mesons?

May 8, 2011 · Replies 4 · May 9, 2011

Replies: 4

Views: 2K

On monopoles' symmetry and other concerns

May 8, 2011 · Replies 2 · May 8, 2011

Replies: 2

Views: 1K

How do we determine the convection coefficient for extended surfaces or fins?

May 8, 2011 · Replies 1 · May 8, 2011

Replies: 1

Views: 2K

How can the differential equation for a sphere in a room be solved?

May 7, 2011 · Replies 6 · May 8, 2011

Replies: 6

Views: 2K

Energy of interfering standing wave

May 5, 2011 · Replies 2 · May 7, 2011

Replies: 2

Views: 2K

Recirculating Fluid Turbine: A Thermodynamic Challenge

May 5, 2011 · Replies 19 · May 6, 2011

Replies: 19

Views: 3K

Reaching any point mass configuration by internal forces

May 6, 2011 · Replies 2 · May 6, 2011

Replies: 2

Views: 2K

Finding Wavevector in 2D Domain

May 5, 2011 · Replies 2 · May 6, 2011

Replies: 2

Views: 3K

Understanding Dipole and Quadrupole Moments for Energy Calculation

May 5, 2011 · Replies 2 · May 6, 2011

Replies: 2

Views: 3K

Conceptual question regarding equal and opposite reactions

May 6, 2011 · Replies 1 · May 6, 2011

Replies: 1

Views: 2K

The Mystery of Pseudo/Inertial Forces: Explained

May 5, 2011 · Replies 3 · May 6, 2011

Replies: 3

Views: 3K

Elliptical Orbit: Determine Foci & Missile Path

May 5, 2011 · Replies 2 · May 5, 2011

Replies: 2

Views: 2K

What is the derivation of Fourier's Law of Conduction?

May 3, 2011 · Replies 8 · May 4, 2011

Replies: 8

Views: 3K

What is the Issue with Extensive Properties of Entropy?

May 3, 2011 · Replies 5 · May 3, 2011

Replies: 5

Views: 3K

Simple/compound machine design

May 1, 2011 · Replies 1 · May 2, 2011

Replies: 1

Views: 3K

Hamiltonian Function - Definition & Explanation

Sep 28, 2007 · Replies 16 · May 2, 2011

Replies: 16

Views: 10K

Circuit completion : is it necessary?

Apr 26, 2011 · Replies 161 · May 2, 2011

6

Replies: 161

Views: 20K

Calculate Fish Lure Depth Behind Moving Boat

Apr 30, 2011 · Replies 4 · May 1, 2011

Replies: 4

Views: 4K

Understanding P-V Diagrams: Work Done and Heat Input in a Closed Loop Process

Apr 30, 2011 · Replies 3 · May 1, 2011

Replies: 3

Views: 2K

2nd moment of area without using integration

Apr 29, 2011 · Replies 8 · Apr 30, 2011

Replies: 8

Views: 8K

Basic question regarding point of view

Apr 29, 2011 · Replies 2 · Apr 29, 2011

Replies: 2

Views: 2K

Induced E Field? B Field, Current, Electron

Apr 29, 2011 · Replies 4 · Apr 29, 2011

Replies: 4

Views: 1K

Counter-Steering when driving a motercycle

Apr 28, 2011 · Replies 2 · Apr 28, 2011

Replies: 2

Views: 2K

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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