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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

Observation about the rotation of a disc
27.6K threads
Graduate Observation about the rotation of a disc

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
High School Cornstarch Unusual Properties & Extra Water Effects
  • WiFO215
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5
Can a Fridge Cool a Room or Will a Canvas Roof Buffer Work?
  • tgkprog
  • · Replies 5 ·
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5
Undergrad Conflicting Answers on W|A for 844200 and Units of Measurement
  • neic
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2
Graduate What Are the Most Fascinating Idealized Entities in Physics?
  • Borek
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Graduate Now, the question is how to make it thin without reaching that temperature...
  • SAZAR
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Undergrad Maximum number of mutually immiscible liquid phases
  • DaTario
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Undergrad Interesting bouyancy theoretical question
  • amnestic
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Graduate OMEGA Formula: Integrating to Find the Answer
  • yugo9
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1
High School Classical Physics-Modern Physics
  • Wannabeagenius
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2
  • Poll Poll
Graduate Fe+ Brine Solution forcing by Earth Tides
  • Squatchmichae
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1
Graduate Instant accelelation in travelling wave
  • petermer
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3
Graduate Understanding Diffusion: Steady State and Boundary Conditions Explained
  • mordechai9
  • · Replies 10 ·
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10
High School Understanding Standing Wave Basics for Non-Physicists
  • yerpo
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1
High School What's quality factor in oscillation ?
  • abcdefg10645
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1
High School Why Do Phys Equations Use Squared Signs?
  • majormuss
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2
High School Why does all energy travel in waves?
  • DARKSYDE
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4
Undergrad No problem, glad I could help! Good luck with your modeling!
  • burrkie
  • · Replies 4 ·
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4
Access Needed: Journal "10.1051/jphyscol:1974623" Requested
  • Rajini
  • · Replies 5 ·
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5
Undergrad What if you were in a hollow, extremely strong tube in the middle of a planet?
  • kashiark
  • · Replies 4 ·
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4
Graduate Can constant velocities produce a longitudinal wave?
  • luckis11
  • · Replies 2 ·
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2
Undergrad Gas Animations: Create Videos from Particles Positions
  • shakespeare86
  • · Replies 1 ·
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1
High School Why Mosquitoes Spin After Being Swatted
  • WiFO215
  • · Replies 11 ·
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11
Graduate Relation between occupation probability and first passage probability
  • WiFO215
  • · Replies 4 ·
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4
Graduate Stationary waves energy problem
  • pisatajay2009
  • · Replies 5 ·
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5
Graduate Can the Peclet Number Control Diffusion in Nanoscale Laminar Flow Experiments?
  • ponjavic
  • · Replies 1 ·
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Graduate Gauss' Theorem for gravitational force
  • coki2000
  • · Replies 7 ·
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7
Symbols such as derivative symbols
  • delve
  • · Replies 2 ·
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2
Graduate Why is Diffusion Called a Second Rank Tensor Variable?
  • xfshi2000
  • · Replies 5 ·
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5
What is Rhostat? Learn How It Works
  • waqarrashid33
  • · Replies 2 ·
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2
What is your favorite equation?
  • zeromodz
  • · Replies 6 ·
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6
High School Gravitational force, is it inverse square law?
  • mabs239
  • · Replies 2 ·
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2
Undergrad What Are Dot Products and Vector Cross Products in Mathematics?
  • woodie37
  • · Replies 1 ·
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1
High School Wifi n bluetooth technology how?
  • anvesh111
  • · Replies 2 ·
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2
Undergrad Is the Average Kinetic Energy the Same as the Kinetic Energy?
  • God's Pen
  • · Replies 2 ·
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2
Undergrad Detection of string vibrations using home equipment
  • DudasPL
  • · Replies 1 ·
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1
Graduate Where does the energy disappear to?
  • IPhO' 2008
  • · Replies 4 ·
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4
Graduate How Do Dipole-Dipole Interactions Influence Molecular Behavior?
  • secret2
  • · Replies 6 ·
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6
High School Understanding Tidal Forces: An Overview
  • wofsy
  • · Replies 1 ·
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1
High School Is There a Simplified Explanation of Physics?
  • marko33
  • · Replies 11 ·
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11
Graduate Standing waves in surface vibrations in rods?
  • yerpo
  • · Replies 22 ·
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22
YouTube: Perpetual Energy - How do you explain this?
  • VansenS
  • · Replies 2 ·
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2
Graduate Navier Stokes EquationQuestion about the Diff EQ
  • Saladsamurai
  • · Replies 6 ·
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6
High School When I vibrate one end of a string, the wave is set up?
  • WiFO215
  • · Replies 1 ·
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1
Graduate Circular Drum Head Modes: Understanding Why They Don't Always Follow the Rules
  • RedX
  • · Replies 3 ·
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3
Graduate How Do You Calculate the Standard Deviation of Total Average in MRI ROIs?
  • xfshi2000
  • · Replies 2 ·
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2
Undergrad Conserved Quantities: Role in Physical Systems
  • saravanan13
  • · Replies 2 ·
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2
Undergrad What Are the Emission Spectra Results for H, He, Ne, Hg, and N₂?
  • KBriggs
  • · Replies 3 ·
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3
Graduate Anderson localization - waves experiment
  • saadsarfraz
  • · Replies 1 ·
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1
Undergrad How Does Wind Influence Wave Dynamics on the West Coast?
  • JANm
  • · Replies 2 ·
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2
Undergrad Can Transverse Waves Exist in the Ocean Due to Hydrogen Bonding?
  • pinguthepengu
  • · Replies 2 ·
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2
High School What's the difference between energy and force?
  • kashiark
  • · Replies 11 ·
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11
Graduate Does Energy Decay Occur in Sealed Metal Boxes with Excited Resonant Modes?
  • apoptosa
  • · Replies 1 ·
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1
How to Put Together a Slip-N-Slide
  • diablo_slayer
  • · Replies 1 ·
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1
Graduate Intuitive reason for no gravity in a hollow sphere
  • Bartholomew
  • · Replies 29 ·
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29
Undergrad What does Q have to do with frequencies?
  • johnjaypl
  • · Replies 12 ·
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12
Undergrad Why transverse wave cannot propagate in a gas or in liquid?
  • sphyics
  • · Replies 8 ·
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8
Undergrad Understanding Solid Angle and its Relation to s=rθ
  • hasanhabibul
  • · Replies 3 ·
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3
Graduate Understanding Purcell's Cube: Attraction to Mass Center?
  • fluidistic
  • · Replies 3 ·
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3
Undergrad Why Does Density Affect Velocity of Sound?
  • hasanhabibul
  • · Replies 1 ·
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1
High School Harness Infinite Energy with Magnets in Space
  • menniandscience
  • · Replies 15 ·
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15
Graduate Ocean Waves: Linear & Schoenbergers Wave Formulas
  • Governor
  • · Replies 12 ·
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12
Graduate Laplace Equation on semi-infinite plate
  • ZombieCat
  • · Replies 2 ·
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2
Graduate Where does exp(-4pi^2) appear in physics?
  • franoisbelfor
  • · Replies 10 ·
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10
Graduate Are Statistical Ensembles Just Mathematical Tools or Realistic Concepts?
  • parton
  • · Replies 1 ·
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1
High School A few questions about different stuff (plus request for a good source to learn)
  • Mad_Eye
  • · Replies 10 ·
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10
Graduate Transforming Real Signals to Complex Representation
  • fisico30
  • · Replies 4 ·
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4
Undergrad Vectors and coordinate transformations
  • rockyshephear
  • · Replies 15 ·
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15
Undergrad No prefix: What is the energy required to ionize air?
  • Alex Schaller
  • · Replies 3 ·
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3
High School What Does Force Mean in Different Contexts?
  • eranb2
  • · Replies 6 ·
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6
Undergrad The Doppler Effect (in general)
  • Urmi Roy
  • · Replies 64 ·
3
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64
Orthographic critique about an arxiv paper
  • fluidistic
  • · Replies 2 ·
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2
Undergrad Backpressure in Microfluidics: Explained by a French Student
  • frenchero
  • · Replies 2 ·
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2
Undergrad Discover the Best Literature on Thermodynamics and Plasmas for Beginners
  • veselyi
  • · Replies 1 ·
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1
Graduate Is there a func' for ideal x-section area in a resonant beam?
  • silverslith
  • · Replies 1 ·
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1
Undergrad What does a molecule having dipole moment signify?
  • Idoubt
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Graduate Young's modulus and bulk modulus of cooked pasta
  • bmbbbh
  • · Replies 4 ·
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4
I was just wondering (not a hw question) whats the best design for penny barge?
  • spectravoid
  • · Replies 1 ·
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1
Graduate Are chaotic systems really determinitistic?
  • SW VandeCarr
  • · Replies 60 ·
3
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60
Undergrad What are the uses of quaternions in Physics?
  • C.E
  • · Replies 3 ·
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3
High School Understanding Modulation: Types and Meaning
  • ecestar
  • · Replies 4 ·
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4
High School U Value of Glass - Get the Facts Here
  • Joellll
  • · Replies 3 ·
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3
High School Calculating calorie with the help of pedometer
  • anoop4real
  • · Replies 1 ·
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1
Graduate What is the Diffusion Tensor for Isotropic Media?
  • Carl140
  • · Replies 3 ·
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3
Graduate Resonant Absorption: Does Material Absorb Wave Energy?
  • Thierry12
  • · Replies 2 ·
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2
High School How do you derive this (E=v/d)?
  • dE_logics
  • · Replies 4 ·
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4
Graduate Unravelling the Mystery of the Inward Pulling Shower Curtain
  • michelcolman
  • · Replies 11 ·
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11
Undergrad What Are Cells in a Laptop Battery?
  • swraman
  • · Replies 3 ·
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3
Find Hockey Stick Data: Tips from Liz
  • lizglasgow
  • · Replies 4 ·
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4
Help in simulation of stone skipping
  • ashkan.afshar
  • · Replies 2 ·
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2
High School Everything is made out of nothing?
  • nix
  • · Replies 22 ·
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22
Graduate Spherical shock wave propagation in liquids
  • Bpapdi
  • · Replies 5 ·
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5
Spring IR Melting: The Raspberry Cane Effect
  • turbo
  • · Replies 1 ·
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1
Graduate Question regarding Helmoltz equation
  • maverick280857
  • · Replies 2 ·
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2
High School What is the difference between induced and influenced ?
  • eranb2
  • · Replies 1 ·
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1
Undergrad Utility of Form factor and Crest factor in an AC waverform
  • dE_logics
  • · Replies 2 ·
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2
1995 Ap Free Response Physics C Solutions
  • twentysix26
  • · Replies 1 ·
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1
If their was a suit that was able to stay hot on the outside of it,
  • afcwestwarrior
  • · Replies 2 ·
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Graduate Microscopic difference between gas and liquid
  • jostpuur
  • · Replies 3 ·
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3
Remote monitoring of patient teperature
  • ecestar
  • · Replies 10 ·
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10
High School Density of Air & Helium: How It Relates to Weight
  • nour naser
  • · Replies 2 ·
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