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.

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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
High School Is this equation at all sensical?
  • DaveC426913
  • · Replies 3 ·
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3
Undergrad Some questions regarding Acoustic wave reflection
  • itamar123
  • · Replies 11 ·
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11
Undergrad How does pi in physics relate to circular motion and waves?
  • NoahOl
  • · Replies 16 ·
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16
High School Tangential Velocity (maybe)
  • Old Man Scho
  • · Replies 33 ·
2
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33
High School Can Ionic Compounds conduct electricity in a gaseous state?
  • SliverStrike
  • · Replies 3 ·
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3
Undergrad What happens to X-rays if they do not meet Bragg's law?
  • gaiussheh
  • · Replies 1 ·
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1
High School Confusion about Wave Motion
  • ktmsud
  • · Replies 14 ·
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14
Undergrad Regarding noise propagation
  • Helios047
  • · Replies 6 ·
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6
Undergrad Gravity at Earth's poles vs equator
  • michelcolman
  • · Replies 12 ·
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12
Undergrad Does a component of a vector have components?
  • titasdasplus
  • · Replies 14 ·
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14
Undergrad Sealing vacuum chamber holes air tight
  • zaillian
  • · Replies 21 ·
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21
Undergrad Why is saxophone growling produced by modulation of the sound waves?
  • Daniel Petka
  • · Replies 92 ·
4
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92
High School My head spins when I think about time
  • mixfijoe
  • · Replies 8 ·
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8
High School If the source of the pressure distribution around a lifting airfoil is known, why is not explained in textbooks?
  • Squizzie
  • · Replies 23 ·
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23
Graduate Electron drift velocity in a gas discharge
  • Timothy S.
  • · Replies 1 ·
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1
High School Can sound travel through clay?
  • Housey210
  • · Replies 16 ·
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16
Undergrad Gas Pressures and the Resistance of Materials (Biodigester Generates Methane)
  • Steven Bolgiano
  • · Replies 16 ·
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16
Undergrad Fluorescent lamps And Fan remote
  • Aryamehr
  • · Replies 2 ·
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2
High School Is an ellipsoid the best shape for a BBQ?
  • synch
  • · Replies 10 ·
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10
Undergrad Claude Naiver work on Navier-Stokes equations
  • user079622
  • · Replies 2 ·
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2
Undergrad What is Surface Plasmon Resonance?
  • PhysicsEnjoyer31415
  • · Replies 2 ·
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2
Undergrad What are the properties of a Sound Pressure Wave going down into a Cone?
  • gary350
  • · Replies 11 ·
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11
Undergrad Using a tuning fork vs computer tuner for violin
  • sussertown
  • · Replies 12 ·
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12
High School Sound Intensity doubles if number of noise sources double?
  • Kashmir
  • · Replies 7 ·
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7
Undergrad Could vibration carry electricity or something else?
  • uncleoscy
  • · Replies 2 ·
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2
High School What Causes the Void Formation in Discarded Yogurt During Disposal?
  • ROGER WALL
  • · Replies 1 ·
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1
High School Sine wave noise at different frequencies
  • Ephant
  • · Replies 77 ·
3
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77
High School Airflow around a vertical cylinder (such as a cigar)
  • DaveC426913
  • · Replies 13 ·
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13
Undergrad Infinite flow with capillary tubes?
  • Warp
  • · Replies 1 ·
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1
Undergrad Feynman lectures on physics: random walk
  • YanaFFF
  • · Replies 6 ·
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6
High School Why Do Poached Eggs Stay In The Center?
  • bmarc92
  • · Replies 10 ·
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10
High School Is the Longer Path Quicker in Physics?
  • valenumr
  • · Replies 7 ·
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7
Undergrad Sound power, amplitude, frequency, and decibels
  • ngn
  • · Replies 5 ·
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5
Undergrad For fun: How fast would an open-front CRT kill an average human? [A?]
  • DynV
  • · Replies 3 ·
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3
  • Redirect
Can a mathematician solve high school physics tasks without physics knowledge?
  • user079622
  • · Replies – ·
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–
High School Log relationship between thickness of material and sound absorbed?
  • Marcogoodie
  • · Replies 1 ·
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1
Undergrad Why singing a note while playing a note creates a difference frequency
  • Daniel Petka
  • · Replies 8 ·
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8
High School Conversion of Potential Energy: Sound or Heat?
  • Darmstadtium
  • · Replies 12 ·
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12
High School Speed of sound in steel at different temperatures?
  • Dante Meira
  • · Replies 2 ·
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2
High School Why does a plasma ball emit light?
  • ahmeds
  • · Replies 10 ·
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10
Undergrad Understanding Ultrasound Attenuation and Reflection in Aluminum Sheets
  • ChrisCOD
  • · Replies 15 ·
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15
High School What is the difference between standing wave and resonance?
  • jinweiiii
  • · Replies 18 ·
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18
Undergrad What happens if you connect the ocean floor and the surface with a pipe?
  • abrek
  • · Replies 13 ·
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13
Undergrad How Can I Create a Flavored Coating for Ice Spheres in Cocktails?
  • AstroBar
  • · Replies 4 ·
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4
Undergrad Is nonlinear acoustics in mainstream physics?
  • Squizzie
  • · Replies 42 ·
2
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42
Undergrad Uncertainties accumulate when measuring longer lengths?
  • fog37
  • · Replies 7 ·
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7
Undergrad Reported uncertainties for time and distance in physics experiment
  • fog37
  • · Replies 1 ·
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1
High School How to statistically calculate the final value?
  • Lotto
  • · Replies 7 ·
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7
Undergrad How does a free surface flow cause non-linearity?
  • binbagsss
  • · Replies 4 ·
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4
Undergrad Can Ultrasound Be Used to Penetrate Through Air and Bone?
  • Sibilo
  • · Replies 32 ·
2
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32
Undergrad Understanding Ultrasound Blocking: Effects on Energy, Reflection, and Absorption
  • ChrisCOD
  • · Replies 1 ·
Replies
1
High School Non-Sinusoidal Standing Waves Existence?
  • QuantumCuriosity42
  • · Replies 11 ·
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11
Undergrad Interesting sound-making hydrogen-burning device
  • Spinnor
  • · Replies 2 ·
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2
Undergrad How is this the same as this? (two kinds of waves)
  • physicsmaster123
  • · Replies 7 ·
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7
Undergrad The physics behind mixing coloured pigments (questions inside post)
  • TomP86
  • · Replies 4 ·
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4
High School How are fractures in airplane structures detected by ultrasound?
  • pgirl1729
  • · Replies 2 ·
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2
Undergrad What power rating do UV-A Tubes have? (tanning salons)
  • Arceus
  • · Replies 10 ·
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10
High School Explaining Variations of Free-Fall Gravity on Earth?
  • StarHunter
  • · Replies 22 ·
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22
Undergrad Error on a weighing scale due to wrong size
  • cloa513
  • · Replies 4 ·
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4
High School Units of S/N ratio in some papers
  • HAYAO
  • · Replies 8 ·
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8
High School Some questions about humidity and storing DVDs in a closed cardboard box
  • carlos78
  • · Replies 3 ·
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3
Undergrad Is the energy destroyed in this experiment?
  • new_scientist
  • · Replies 15 ·
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15
High School What is meant by "local melting"?
  • Lotto
  • · Replies 11 ·
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11
Undergrad Understanding the propagation of sound on molecular Scale
  • Slimy0233
  • · Replies 8 ·
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8
High School The SpaceX Launch and Aftermath
  • TonyStewart
  • · Replies 1 ·
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1
High School Water surface behavior under pressure change
  • Bjott
  • · Replies 4 ·
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4
Undergrad Understanding Vectors: Magnitude & Direction
  • Trying2Learn
  • · Replies 14 ·
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14
High School Should I use True North or Magnetic North to align my sundial?
  • gary350
  • · Replies 15 ·
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15
High School How does the density of air affect the note you hear?
  • rafk_1
  • · Replies 7 ·
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7
Undergrad Neil DeGrasse Tyson on "sharing water" with historical figures
  • willym
  • · Replies 15 ·
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15
High School How long does it take to reach harmful CO2 levels in a room?
  • Airbreather
  • · Replies 11 ·
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11
Undergrad Surface area and length (percent increase relationship)
  • simito_
  • · Replies 6 ·
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6
Graduate Conservation Laws from Continuity Equations in Fluid Flow
  • Stuart_M
  • · Replies 2 ·
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2
Undergrad At what level will the water settle in this system?
  • mcmpw
  • · Replies 14 ·
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14
Undergrad Measuring Low Resistance: Why Meter Bridge is the Preferred Choice
  • phymath7
  • · Replies 5 ·
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5
Undergrad Pickleball Physics -- Player reaction time vs aging
  • tjmoorpark
  • · Replies 2 ·
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2
Undergrad What is the benefit of measuring both direct and reverse current?
  • phymath7
  • · Replies 5 ·
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5
High School Negative pressure in a car to power it
  • Bike Mi Vie
  • · Replies 23 ·
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23
High School Air tank PSI and cubic feet calculation help please
  • Edm
  • · Replies 1 ·
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1
Undergrad Equations for Spherical Resonators
  • DrewPear
  • · Replies 3 ·
Replies
3
High School How Do Oscillations and Particles Interact in Electromagnetic Fields?
  • nrckls
  • · Replies 9 ·
Replies
9
High School Hydrodynamics Effects: Are They the Same?
  • dom_quixote
  • · Replies 3 ·
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3
Undergrad Don't Ever Mention "Centrifugal Force" to Physicists
  • Argonaut
  • · Replies 121 ·
5
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121
Undergrad What is the best way to shield / jam ultrasound?
  • michael93
  • · Replies 8 ·
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8
Undergrad Relationship between the Different Frequency vs Decibel Graph Peaks
  • Darmstadtium
  • · Replies 3 ·
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3
High School Atmospheric pressure, vacuum, etc.
  • tomlib
  • · Replies 9 ·
Replies
9
Undergrad The effect of temperature on the damping of a guitar string
  • SamuuLau
  • · Replies 1 ·
Replies
1
Graduate Helmholtz Resonator: attenuation vs. amplification
  • DrChef
  • · Replies 12 ·
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12
High School Why is there so much multplication in physics?
  • dainceptionman_02
  • · Replies 29 ·
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29
High School Question about a vacuum ejector (vacuum pump using the Venturi effect)
  • nicolas1409
  • · Replies 6 ·
Replies
6
High School Energy needed to stop the Earth's inner core ---and its effects?
  • xpell
  • · Replies 5 ·
Replies
5
High School Knudsen Flow: High School Student Q&A
  • Chain Shawn
  • · Replies 4 ·
Replies
4
High School How to calculate measurement error by using other quantities?
  • Lotto
  • · Replies 6 ·
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6
Graduate Hydrodynamic stability- Rayleigh equation - Couette flow
  • URIA
  • · Replies 5 ·
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5
Graduate Is Orbital Velocity the Same as RMS of Eddy Velocities in Turbulent Flow?
  • rdemyan
  • · Replies 1 ·
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1
Graduate How Does Anisotropy Affect the Calculation of Taylor Microscale in Turbulence?
  • rdemyan
  • · Replies 1 ·
Replies
1
Graduate Equations of State in Modern Classical Physics (Thorne/Blandford)
  • RobertDSmeets
  • · Replies 7 ·
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7
High School How to describe complicated dimensions?
  • NODARman
  • · Replies 7 ·
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7
High School Units in exponentials and logarithms
  • mixj
  • · Replies 10 ·
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10
Undergrad How is the damping of sound (over distance) affected by air properties?
  • daanisrael
  • · Replies 8 ·
Replies
8