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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.

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Mechanics

A Toy Model of Atmospheric Geophysics
27.6K threads
Undergrad A Toy Model of Atmospheric Geophysics

Optics

Question about computing diffraction patterns
8.2K threads
High School Question about computing diffraction patterns

Thermodynamics

Musing on the Foundations of Statistical Mechanics
7.4K threads
Graduate Musing on the Foundations of Statistical Mechanics

Electromagnetism

A magnetostatics problem of interest 2
16.3K threads
Graduate A magnetostatics problem of interest 2
Undergrad What affects the linear mass density of a string?
  • Samurai44
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1
Graduate Are Time Periods of Combined Vibrations Always Commensurable?
  • NRa
  • · Replies 4 ·
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4
Undergrad Switching between distance variables in a simple seismograph
  • shanepitts
  • · Replies 3 ·
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3
Undergrad Cofactor Matrix Confusion: Solving for Minor Determinants
  • Wminus
  • · Replies 2 ·
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2
Undergrad Understanding Resonance: Causes and Effects Explained
  • member 529879
  • · Replies 15 ·
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15
High School How Can Understanding Basic Physics Concepts Improve Everyday Problem Solving?
  • AshUchiha
  • · Replies 17 ·
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17
High School Waves traveling in all directions
  • member 529879
  • · Replies 6 ·
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6
Undergrad Aluminium oxide surface and conductivity?
  • spareine
  • · Replies 3 ·
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3
Undergrad Can Huygens Principle Be Applied to Waves on a String with Fixed Ends?
  • DaTario
  • · Replies 1 ·
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1
High School What causes waves to dissipate in different mediums?
  • member 529879
  • · Replies 7 ·
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7
High School The History of Ticker Timers in Physics Experiments
  • Parsa
  • · Replies 7 ·
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7
Graduate Scaling Interpretation for 2-D Continuity PDE: What Does UH/L Represent?
  • member 428835
  • · Replies 4 ·
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4
High School Finding collected count when given average value.
  • Hellreignz
  • · Replies 2 ·
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2
Graduate Is there a relationship between amplitude response and phase?
  • manjuvenamma
  • · Replies 1 ·
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1
High School Classical physics history books
  • Arlax
  • · Replies 10 ·
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10
High School Capillary Rise in Tube: What Happens if Length is Insufficient?
  • Joel Jacon
  • · Replies 6 ·
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6
High School Is there even a scientific reason for this
  • kay
  • · Replies 8 ·
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8
Undergrad Understanding Solitons: How are they different from standard waves?
  • gentsagree
  • · Replies 1 ·
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1
Undergrad Solve Physics Puzzle Problem - 200 Puzzling Physics Problems
  • c++guru
  • · Replies 11 ·
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11
Graduate Guitarist in search of practical answers
  • GuitarBizarre
  • · Replies 19 ·
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19
Undergrad Is F in P=F/A an average or a sum of all microscopic forces?
  • Greg777
  • · Replies 1 ·
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1
Graduate Structure of orbits at a tornado, whrilwind, etc.
  • luckis11
  • · Replies 1 ·
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1
Graduate Please explain how this integration is done
  • bksree
  • · Replies 2 ·
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2
Graduate The Standard Deviation of a Brownian Force
  • abelthayil
  • · Replies 1 ·
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1
Undergrad Are waves always the sum of sine waves?
  • Nick Jackson
  • · Replies 8 ·
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8
Graduate Deriving the formula for sine waves
  • Nick Jackson
  • · Replies 4 ·
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4
High School A little question I want to ask
  • Sundown444
  • · Replies 6 ·
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6
Undergrad Standing Waves and Resonance in Fixed-End Transverse String Vibration
  • ofeyrpf
  • · Replies 2 ·
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2
Undergrad Components of standing wave between harmonic frequencies
  • ofeyrpf
  • · Replies 1 ·
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1
Undergrad What is St. Elmo's fire enrgy source?
  • Stanley514
  • · Replies 10 ·
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10
Undergrad Wave Properties: Understand the Physics
  • britney999
  • · Replies 12 ·
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12
Undergrad What defines density of chemical substances?
  • Stanley514
  • · Replies 4 ·
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4
Graduate Can the Larmor formula explain the stability of electron rotation?
  • MickaelPC
  • · Replies 6 ·
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6
Graduate Reference for Learning About Waves
  • axsvl77
  • · Replies 2 ·
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2
Undergrad What Does Azimuthal Symmetry Mean in Physics?
  • ahmad1992
  • · Replies 2 ·
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2
Graduate Does quality factor of a resonator depend on the excitation signal?
  • shpongle
  • · Replies 1 ·
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1
What would crack easier? An iPhone 6 or an iPad air?
  • Jbeats245
  • · Replies 15 ·
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15
High School Symbols for physics, geometry, calculus ext
  • Simon = Mc2
  • · Replies 6 ·
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6
High School Physics Experiments to Do at Home
  • Simon = Mc2
  • · Replies 2 ·
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2
Undergrad Suggestions on research paper on artificial satellites
  • Crutchlow13
  • · Replies 6 ·
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6
High School How Fans Move Air: Propeller vs. Blade Shape
  • bnvbnv
  • · Replies 5 ·
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5
Graduate How do macroscopic brownian ratchets extract energy from random vibrations?
  • parsec
  • · Replies 18 ·
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18
Undergrad Back to basics: What exactly is an emission spectrum?
  • rwooduk
  • · Replies 6 ·
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6
Undergrad Understanding Standing Waves and their Velocity on a String
  • jlyu002@ucr.e
  • · Replies 15 ·
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15
High School Guys need your help -- Fishtank inflow/outflow rates
  • Ruckus
  • · Replies 7 ·
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7
Graduate How to Fourier transform this expression?
  • Steve Drake
  • · Replies 1 ·
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1
Graduate Measuring Viscosity of Materials with Dynamic Modulus
  • gkiverm
  • · Replies 3 ·
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3
High School Teaching Error in Measurement Lab
  • CSOleson
  • · Replies 2 ·
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2
Graduate 2D Harmonic Oscillator example
  • fog37
  • · Replies 13 ·
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13
High School Why does air release differently from a slightly open versus a wide open mouth?
  • kartikwat
  • · Replies 7 ·
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7
Graduate How Is Reynolds Stress Calculated from RANS Equations?
  • member 428835
  • · Replies 3 ·
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3
High School Experimenting with CD: Making Bubbles with Physics
  • Oomph!
  • · Replies 1 ·
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1
Undergrad Does Young's Modulus Vary with Changes in Size?
  • gkiverm
  • · Replies 5 ·
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5
Graduate Aether Experiments: What's Your Take?
  • user1
  • · Replies 5 ·
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5
Undergrad Difference between wavenumber and wave mode?
  • sawer
  • · Replies 10 ·
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10
High School Progressive Wave Nodes: Why Don't They Exist?
  • desmond iking
  • · Replies 1 ·
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1
Undergrad Understanding the Relationship Between A and B: A Variation Analysis
  • ChrisVer
  • · Replies 4 ·
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4
Graduate Nonlinear Fluid Dynamics & Free Energy Flow
  • Shishir_93
  • · Replies 1 ·
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1
Graduate Capillary action meniscus height in a tube fitted inside another tube?
  • Alfred1
  • · Replies 2 ·
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2
Undergrad Diffusion of Liquid: Explaining the Physics
  • Oomph!
  • · Replies 1 ·
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1
Undergrad Molecular Physics: Why is Less Dense Liquid Higher Than More Dense?
  • Oomph!
  • · Replies 8 ·
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8
High School Why Does Pepper Move to the Edge of the Plate in the Soap Experiment?
  • Oomph!
  • · Replies 1 ·
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1
Graduate The formula pV=1/3Nm(c_rms)^2 in non cuboids
  • GeneralOJB
  • · Replies 2 ·
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2
High School Why Does Water Rise in Empty Glass When Using a Paper Towel?
  • Oomph!
  • · Replies 1 ·
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1
Undergrad Transformation Y-Δ with matrix?
  • Jhenrique
  • · Replies 1 ·
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1
Graduate Can someone explain these equations?
  • pierce15
  • · Replies 4 ·
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4
Undergrad Oscillator driving frequencies
  • Saado
  • · Replies 3 ·
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3
Improving Cooling Efficiency: Two Effective Strategies
  • arash karimi
  • · Replies 2 ·
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2
Undergrad Question about the possible use of waves in a certain device
  • Nerdydude101
  • · Replies 1 ·
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1
Graduate Waves: When do we use $e^{i(-kx + wt)}$ as opposed to $e^{i(kx - wt)}$
  • 122520253025
  • · Replies 6 ·
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6
Passive flapping butterfly garden ornament?
  • Stephen Tashi
  • · Replies 2 ·
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2
Undergrad Question about cylindrical Coordinates
  • PsychonautQQ
  • · Replies 1 ·
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1
High School Difference between physical property and physical quantity?
  • christian0710
  • · Replies 3 ·
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3
Graduate How to compute the energy of scalar wave equation
  • xortdsc
  • · Replies 12 ·
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12
Undergrad When to use gradient and when to use only one coordinate
  • FaroukYasser
  • · Replies 2 ·
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2
Graduate Orienational order parameter in isotropic systems
  • Liam79
  • · Replies 1 ·
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1
Undergrad Explain Poiseuille's Law - Learn Quickly
  • SarcasticBunny
  • · Replies 4 ·
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4
Graduate How Can We Design a Solar Drone with Long Duration Flight and High Payload?
  • yuiop
  • · Replies 5 ·
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5
Graduate Where can I find the derivation of the Group Velocity formula?
  • PsychonautQQ
  • · Replies 1 ·
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1
Undergrad Maximizing Power Output with Piezoelements: A Comprehensive Guide
  • Coldy
  • · Replies 2 ·
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2
Undergrad Doppler effect, source and receiver in different media
  • nikolafmf
  • · Replies 2 ·
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2
What is program used in ray tracing simulation?
  • einstein1921
  • · Replies 2 ·
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2
Graduate Diffusion: Concentration profile for point sink in infinite plane
  • anvoice
  • · Replies 5 ·
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5
Undergrad Would wind tubine on moving automobile pomote inlet efficiency?
  • kandyho
  • · Replies 6 ·
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6
Graduate High Repetitive Photocathode RF Gun
  • parazit
  • · Replies 6 ·
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6
Undergrad Resonance feedback loop on guitar
  • Normalization
  • · Replies 4 ·
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4
High School Why Does Fundamental Freq Have Largest Amplitude?
  • Jimmy87
  • · Replies 4 ·
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4
Undergrad A question about resonance curve
  • haisydinh
  • · Replies 1 ·
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1
Graduate Relationship between intutions on energy
  • leo.
  • · Replies 12 ·
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12
Graduate Stability of the Classical Rutherford Atom: A Hydrogen Example
  • lufc88
  • · Replies 3 ·
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3
Undergrad Do Standing Waves Occur for All Frequencies?
  • tyneoh
  • · Replies 27 ·
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27
Graduate Complete Removal of Matter from Space
  • brookssp
  • · Replies 6 ·
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6
Graduate An exact solution for the Navier-Stokes?
  • gato_
  • · Replies 2 ·
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2
Undergrad What software can I use to visualize transformations of the plane?
  • sari
  • · Replies 3 ·
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3
High School Creating Cells with Household Materials: Ideas?
  • jldibble
  • · Replies 3 ·
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3
High School What is the Doppler Effect and how does it impact sound perception?
  • TalEly
  • · Replies 12 ·
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12
Graduate Overdamped vs underdamped Langevin
  • LagrangeEuler
  • · Replies 6 ·
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6
Graduate Understanding Negative Energy in Earth-Satellite Systems
  • ASG141
  • · Replies 1 ·
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1
Undergrad Are Oblique Coordinate Systems More Useful Than Orthogonal Systems in 2-D Space?
  • rkmurtyp
  • · Replies 6 ·
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6
High School Why Does Ice Float in Water at 9°C?
  • pscience
  • · Replies 13 ·
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13