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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 Original references for Hertz's experiments
  • qnach
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Undergrad Quick brainteaser - Unknown objects and liquid volume/height
  • rwooduk
  • · Replies 8 ·
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8
Undergrad Can a Non-Conductor Function as an Antenna for 1 cm Waves?
  • qnach
  • · Replies 23 ·
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23
Graduate Can someone explain this plot of the Orr Sommerfeld equation?
  • Navier-Stokes
  • · Replies 1 ·
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High School Is energy transferred as a wave or particle in classical physics?
  • Naman Jain Kota
  • · Replies 4 ·
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4
Graduate Viscous fluid in granular material (DAPL)
  • jman31415
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2
Undergrad Shrunk and thrown into a blender
  • tommy01
  • · Replies 11 ·
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11
Undergrad Confused about "equal a priori"
  • Getterdog
  • · Replies 10 ·
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10
Undergrad How Do You Calculate Error with a Single Measurement in Physics Lab Reports?
  • Derik
  • · Replies 5 ·
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5
Undergrad Gravitational force at the Earth's centre
  • Grahame1
  • · Replies 4 ·
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4
High School Clear definition of microgravity?
  • Logerah
  • · Replies 1 ·
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1
Graduate Stream functions and flow around sphere/cylinder
  • member 428835
  • · Replies 2 ·
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2
Graduate Head Injury at Swimming Pool: Are Pool Tiles at Risk?
  • meni2222
  • · Replies 1 ·
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1
High School Difference between note, tone and mode
  • donaldparida
  • · Replies 4 ·
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4
Undergrad The science behind getting stuck in mud
  • Lightsyn
  • · Replies 3 ·
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3
High School Explaining vector & scalar quantities to a layman
  • Frank Castle
  • · Replies 11 ·
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11
Undergrad Are there always multiple copies of you walking just beside you?
  • Happiness
  • · Replies 3 ·
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3
Undergrad Vortex Experiment: Can Vacuums Create a Vortex?
  • Keith_McClary
  • · Replies 12 ·
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12
Undergrad So is all energy a function of one of the 4 forces?
  • ebos
  • · Replies 2 ·
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2
High School Struggling to understand a consequence of Pascal's priciple
  • Johnls
  • · Replies 20 ·
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20
Graduate Understanding the Young-Laplace Equation: A Derivation and Explanation
  • member 428835
  • · Replies 1 ·
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1
Undergrad General question about math required to do david morins book
  • RubinLicht
  • · Replies 4 ·
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4
Undergrad What is “normal” about normal frequencies and normal modes?
  • AntonPannekoek
  • · Replies 4 ·
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4
High School I don't understand how this was manipulated
  • Saippo
  • · Replies 1 ·
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1
Undergrad Physical Meaning of complex wavenumber?
  • snejburg
  • · Replies 2 ·
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2
High School What is this physics classroom object?
  • roger ryan
  • · Replies 9 ·
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9
Undergrad Longitudinal Waves: Compression & Rarefaction
  • abhinavjeet
  • · Replies 1 ·
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1
High School Whatever Happened to the Bell V Interferometer for Gravitational Waves?
  • houlahound
  • · Replies 2 ·
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2
Undergrad Meniscus Formation: Increase Free Surface Area of Water
  • abhinavjeet
  • · Replies 1 ·
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1
Undergrad Why Do Standing Waves Form with Two Free Ends?
  • huyhohoang
  • · Replies 2 ·
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2
High School What is the relationship between the labeling system and resistivity of pencils?
  • houlahound
  • · Replies 9 ·
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9
High School How many joules expended for a push up?
  • wannab
  • · Replies 11 ·
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11
Undergrad Understanding Poiseuille Equation
  • fog37
  • · Replies 1 ·
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1
Graduate What Makes Vibrations So Common in Nature?
  • larsa
  • · Replies 13 ·
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13
Undergrad If fields fill all of space, how do they have room to move?
  • Pjpic
  • · Replies 11 ·
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11
Undergrad How can we distinguish classical physics and modern physics?
  • Aafia
  • · Replies 11 ·
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11
Undergrad Is Energy Size-Dependent or Just an Abstract Concept?
  • Pjpic
  • · Replies 33 ·
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Undergrad Crum's shell effect - visualisation needed
  • rwooduk
  • · Replies 1 ·
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1
Graduate Discover the Mystery of the Rotating Cylinder Phenomenon
  • Hita
  • · Replies 3 ·
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3
Undergrad What is "making the time integration redundant"?
  • Happiness
  • · Replies 3 ·
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3
Graduate Ondes Planes : Explication et Signification
  • mathben
  • · Replies 2 ·
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2
Insights Frequently Made Errors in Vectors - Elementary Use - Comments
  • haruspex
  • · Replies 2 ·
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2
Undergrad Bubble cavitation - what does a dash mean?
  • rwooduk
  • · Replies 7 ·
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7
Undergrad Can This Equation Be Simplified with Exponential Derivatives?
  • Amany Gouda
  • · Replies 1 ·
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1
Undergrad Is it possible to suck air out of drilling hole completely?
  • ahmed11
  • · Replies 21 ·
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21
Graduate The Wiedemann Effect: Magnetization Inducing Torsion?
  • vin300
  • · Replies 5 ·
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5
Undergrad Where Does the Energy in a Standing Wave Go?
  • Mr Davis 97
  • · Replies 2 ·
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2
Graduate Landau's Books - Vibration - flexible string
  • diamon76
  • · Replies 1 ·
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1
Graduate Normalization of a pair distribution function
  • Korbid
  • · Replies 2 ·
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2
Undergrad Definitive measurement that determines state of matter?
  • curiousoldguy
  • · Replies 4 ·
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4
Undergrad Area of Ring Element: Puzzling Out dA
  • influx
  • · Replies 4 ·
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4
Graduate Wave Equation for Circular Waves
  • greswd
  • · Replies 8 ·
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8
Graduate Orbit of Cube Planet: Physics Explained
  • james_dear
  • · Replies 18 ·
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18
Undergrad Who Plays Saxophone? - Questions on Resonance Modes
  • Anton Alice
  • · Replies 6 ·
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6
Undergrad How do I determine the exact shape of an airfoil blade for my wind turbine?
  • Frankie.S
  • · Replies 10 ·
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10
Undergrad Vector Definition: Magnitude & Direction Effects
  • hokhani
  • · Replies 2 ·
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2
Undergrad Basic Fluid Energy: Pressure, GPE & KE
  • BobP
  • · Replies 8 ·
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8
Video of guitar strings from inside guitar
  • bcrowell
  • · Replies 4 ·
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4
Graduate Why does spin-spin coupling cause splitting in NMR spectroscopy?
  • BobP
  • · Replies 13 ·
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13
Undergrad Diffusion = sedimentation at 1g?
  • twall11347243
  • · Replies 25 ·
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25
Undergrad Why Does Distance Not Affect Frequency in the Doppler Effect?
  • JeremyG
  • · Replies 3 ·
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3
Undergrad Location and intensity prediction of wave energy
  • OTed
  • · Replies 4 ·
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4
Undergrad How do you calculate a thickness dependant impedance to a so
  • rwooduk
  • · Replies 4 ·
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4
Graduate Is a line observable(in real life)?
  • hackhard
  • · Replies 5 ·
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5
Graduate Vacuum: Potential Energy & Universe Expansion?
  • Docak
  • · Replies 18 ·
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18
Graduate Understand K-Space: How Does the White Circle Form?
  • BobP
  • · Replies 9 ·
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9
Graduate Analytical Exp[((-i Phi)/2)*h3]
  • hemza
  • · Replies 1 ·
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1
High School Can there be an equation for coins?
  • teachmind
  • · Replies 5 ·
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5
High School Understanding the Basics of Waves: Definition and Examples | BBC Education Guide
  • Cliff Hanley
  • · Replies 10 ·
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10
Undergrad What exactly does 'x-vt' mean in the wave equation?
  • Jayxl
  • · Replies 17 ·
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17
Graduate Bifurcation between two oscillations
  • onkel_tuca
  • · Replies 2 ·
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2
Graduate Can MRI Fringe Fields be Mapped in a 3D Space?
  • arashazizi
  • · Replies 10 ·
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10
Undergrad Gas solubility in gas versus liquid
  • rwooduk
  • · Replies 6 ·
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6
Undergrad Calculating Copper Density: Is My Bar Pure?
  • CuriousMister
  • · Replies 3 ·
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3
Graduate Where would I find what a gas breaks down into when it....
  • rwooduk
  • · Replies 4 ·
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4
Graduate Face Probabilities of Archimedean Solids
  • Spinalcold
  • · Replies 1 ·
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1
Undergrad Why is the wave equation a second order differential?
  • thegirl
  • · Replies 10 ·
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10
Graduate Harmonic oscillator derivation
  • pabilbado
  • · Replies 2 ·
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2
Undergrad Heads or tails? (Question from Feynman lectures)
  • #neutrino
  • · Replies 4 ·
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4
Graduate Can quantum physics explain the workings of transmitters and receivers?
  • ghost313
  • · Replies 9 ·
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9
High School Phase difference between two points in a stationary wave
  • Janiceleong26
  • · Replies 13 ·
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13
High School Is Reversibility Real or Just a Mathematical Concept?
  • Jimster41
  • · Replies 45 ·
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45
Undergrad Is Propulsion Physics Part of Nuclear Physics?
  • robbie.kpm
  • · Replies 10 ·
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10
High School Is Newton's Concept of Space Still Relevant in Modern Physics?
  • thinkandmull
  • · Replies 4 ·
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4
High School Differences between equations of SHM
  • castor
  • · Replies 7 ·
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7
Undergrad Could 2 dimensional objects fill a 3 dimensional space?
  • Nav
  • · Replies 2 ·
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2
Undergrad Standing waves on a moving string
  • d7vid
  • · Replies 8 ·
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8
Undergrad Is there a solid with such a low density, it floats in air?
  • Alex299792458
  • · Replies 18 ·
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18
Graduate Navier-Stokes Equations for a Compressible Fluid
  • Physicist97
  • · Replies 22 ·
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22
High School Does viscosity have to do with density?
  • Alex299792458
  • · Replies 14 ·
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14
Graduate Why can't pinging excite singing overtones?
  • spareine
  • · Replies 9 ·
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9
Graduate A question about ultrasonic wave
  • fannyfanfanz
  • · Replies 2 ·
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2
Graduate Odd (pretty) waveform for third harmonic of violin E-string
  • Ethan B.
  • · Replies 6 ·
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6
Graduate Open-Ended Air Columns: Natural Freq of Cylinder?
  • Tam Le
  • · Replies 4 ·
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4
Undergrad Creating Paints/Colors outside of Visible Range?
  • WWGD
  • · Replies 17 ·
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17
High School Ideal cells in parallel combination
  • saurabh tiwari
  • · Replies 12 ·
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12
Undergrad Is Sonoluminescence Research Allowed on This Site?
  • Ben Johnson
  • · Replies 1 ·
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1
High School How can the Doppler equation be rearranged to solve for other variables?
  • Zoey Brown
  • · Replies 1 ·
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1
High School Accuracy Defined: What Does 10% Mean?
  • sunmaggot
  • · Replies 5 ·
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5
Insights Frequently Made Errors in Equation Handling - Comments
  • haruspex
  • · Replies 15 ·
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15