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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 How can I calibrate my Ohaus cent-o-gram model 311 balance scale?
  • tony873004
  • · Replies 4 ·
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Graduate Fair and unfair N-sided dice in principle.
  • Spinnor
  • · Replies 6 ·
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6
Undergrad Is the Conservation of Energy a Law or a Fact?
  • iantresman
  • · Replies 5 ·
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5
Graduate Drawing a gravitational field inside a planet
  • MalachiK
  • · Replies 10 ·
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10
Graduate Where Do Sections 3.45 and 3.46 in Goldstein's 3rd Edition Originate?
  • ASmc2
  • · Replies 9 ·
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Graduate What is the physical difference between compression waves and longitud
  • mikelotinga
  • · Replies 4 ·
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4
Graduate Why this solution to the 3D periodic Navier-Stokes?
  • davidpurvance
  • · Replies 2 ·
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2
High School Why are ice cubes not really cubes, but trapezes?
  • Nantes
  • · Replies 9 ·
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9
Graduate Vortices, Resonators, and Foam sleeving
  • DoYouKnow
  • · Replies 2 ·
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2
Undergrad Is there an algorithmic way of drawing phase portraits by hand?
  • mjordan2nd
  • · Replies 1 ·
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1
Graduate Complex Fourier series of sin (t)
  • unscientific
  • · Replies 3 ·
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3
Graduate Solving 1D wave equation for a flag (not attatched at both ends)
  • Flucky
  • · Replies 14 ·
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14
Graduate Predict timbre from First Principles?
  • phlegmatico
  • · Replies 1 ·
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1
Undergrad Fourier Transform of this function
  • unscientific
  • · Replies 6 ·
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6
Graduate Can we write icap-jcap=pi/2 ? why or why not?
  • AakashPandita
  • · Replies 27 ·
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27
Undergrad Is a Sine Wave Defined by Its Physical Shape or Graph Representation?
  • san203
  • · Replies 1 ·
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Undergrad Doppler Shift as Function of MUSIC
  • peterblair
  • · Replies 3 ·
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3
Fictitious Forces: Science Fiction & Fantasy
  • greendog77
  • · Replies 10 ·
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10
High School Lower energy level more stable why?
  • Vivek des
  • · Replies 5 ·
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5
Undergrad Constraint-prof V balakrishnan video
  • ajayguhan
  • · Replies 7 ·
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7
Undergrad What are the Recommended Texts for Understanding Kepler's Laws?
  • AntSC
  • · Replies 3 ·
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3
Graduate How Much Mechanical Stress Can an Antimatter Drive's Loop Handle?
  • nehorlavazapal
  • · Replies 2 ·
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2
Graduate Confused about human sensitivity to color
  • atrix621
  • · Replies 1 ·
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1
Undergrad Normal modes of a string thought experiment
  • Nikitin
  • · Replies 1 ·
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1
High School Mysterious Formula: Can You Help Alicia?
  • agermany
  • · Replies 4 ·
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4
High School Roughly, how many kg of fuel do we need to get x lbs into space?
  • Kidphysics
  • · Replies 1 ·
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1
High School What is the meaning of interaction in science?
  • manimaran1605
  • · Replies 3 ·
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3
Undergrad Why does resistance change in fluid flow from laminar to turbulent conditions?
  • SBMDStudent
  • · Replies 9 ·
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9
Graduate Why can k in the Delta Function equation be both positive and negative?
  • mathnerd15
  • · Replies 5 ·
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5
Graduate What do you think of the terms used in this article?
  • swampwiz
  • · Replies 1 ·
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1
High School Doppler Effect: Speed Relative to Ground, Source, or Listener?
  • Bassel
  • · Replies 2 ·
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2
High School Finding north with copper wire
  • MmeCurie
  • · Replies 2 ·
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2
Graduate Functions dependent on a greater number of parameters
  • tobiaszowo
  • · Replies 1 ·
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1
Undergrad Relative to What? An Energy Conundrum
  • CapnDub
  • · Replies 5 ·
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5
Undergrad What is the relationship between intensity and amplitude in a wave source?
  • Gauss M.D.
  • · Replies 2 ·
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2
Graduate How does radius of point spread function affect reconstruction errors?
  • cp05
  • · Replies 1 ·
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1
Undergrad Why are Batting Gloves Essential for Optimal Performance in Baseball?
  • jdibarto
  • · Replies 1 ·
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1
Undergrad How does a two open ended pipe resonate?
  • iScience
  • · Replies 14 ·
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14
Undergrad Vibration Formulas: Frequency, Amplitude & Acceleration
  • DickT
  • · Replies 1 ·
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1
High School How can 2 signals go thru copper wire?
  • rogersb
  • · Replies 9 ·
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9
Undergrad Gas flow from one chamber to another
  • geologic
  • · Replies 4 ·
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4
Graduate Why is V=fl a dispersion relationship ?
  • parsec
  • · Replies 2 ·
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2
Undergrad What Causes Conductive Film on the Surface of Glass?
  • iScience
  • · Replies 2 ·
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2
High School What psi can be achieved from a 60mph wind
  • Cyclonus
  • · Replies 4 ·
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4
Graduate Unity Hypotenuse Model: Fig. WL & Fig. P
  • Lasand
  • · Replies 5 ·
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5
Graduate Question about Eötvös experiment
  • davidchen9568
  • · Replies 3 ·
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3
Sensitive barometer indicating altitude
  • Alfred Cann
  • · Replies 2 ·
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2
Graduate On the nature of vacuum and questions thereof
  • Lensmonkey
  • · Replies 6 ·
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6
Undergrad Explanation of the discrete fourier transform
  • u0362565
  • · Replies 4 ·
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4
Undergrad Why Do Bounded Mediums Have Specific Eigenfrequencies?
  • saumya yadav
  • · Replies 3 ·
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3
Graduate Tracing seismic rays - possible intersection
  • FermatPell
  • · Replies 1 ·
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1
Undergrad Why does perspective skew some lines and not others?
  • ed2288
  • · Replies 11 ·
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11
Undergrad Wind Turbine Noise Dependence on Temperature & Pressure
  • xujipampil
  • · Replies 1 ·
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1
Undergrad Basic physics understanding. Could someone explain?
  • Ultermarto1
  • · Replies 4 ·
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4
Undergrad I understanding the Fourier components of a square wave
  • jeff.berhow
  • · Replies 5 ·
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5
Undergrad Find a link between physics and assignment problems
  • martin_z
  • · Replies 4 ·
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4
Undergrad Sphygmomonometers energy storage?
  • pnorm91
  • · Replies 2 ·
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2
High School What is the Mole? Answers Here
  • kira506
  • · Replies 10 ·
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10
Undergrad What Are the Uses of RC Filters in Advanced Circuits?
  • potatocar
  • · Replies 6 ·
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6
Undergrad Longitudinal Wave Equation meaning and derivation
  • Enterprise D
  • · Replies 4 ·
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4
High School Rope Climbing Device: Design, Speed & Overall Tips
  • Timmy D
  • · Replies 15 ·
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15
Graduate Modal energy distribution in closed pipe resonance
  • quasar44
  • · Replies 2 ·
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2
Graduate Wave equation for a standing wave - clarification needed
  • elemis
  • · Replies 1 ·
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1
Undergrad Trying to understand granular physics (includes fluid physics)
  • EPhantom
  • · Replies 1 ·
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1
Undergrad Guitar oscillations? How do they look?
  • mahrap
  • · Replies 6 ·
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6
Undergrad Are the Frequencies of a Plucked String and the Corresponding Sound Wave Equal?
  • SweatingBear
  • · Replies 1 ·
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1
High School Is a Car's Speed of 110km/h Accurate to 3 or 4 Significant Figures?
  • e-zero
  • · Replies 73 ·
3
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73
Graduate Standing waves - Wave Equation
  • elemis
  • · Replies 3 ·
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3
Undergrad Harmonic Plane Wave: Form & Explanation
  • Tosh5457
  • · Replies 5 ·
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5
High School Help solving the vibrating pole mystery.
  • Quinzio
  • · Replies 4 ·
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4
Graduate Equation - Wave Equation Derivation Question
  • alejandrito29
  • · Replies 1 ·
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1
Undergrad Is gravity strongest in center?
  • Boy@n
  • · Replies 13 ·
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13
Undergrad What are the potential uses for ferrofluids in interactive museum displays?
  • Crystian
  • · Replies 2 ·
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2
Undergrad Equal probability principle
  • Abigale
  • · Replies 1 ·
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1
Graduate Dispersion Relation: Beads and String
  • mathskier
  • · Replies 18 ·
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18
High School Science Fair Ideas - High School Level Ideas Needed
  • Roninator
  • · Replies 1 ·
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1
Undergrad Where to find sample fluid stirring data?
  • muffinman123
  • · Replies 1 ·
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1
Graduate 2D Doppler Shift / Relative Velocities
  • awelex
  • · Replies 1 ·
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1
Graduate Oxygen Flow Through a Concentration Gradient
  • TheChannigan
  • · Replies 2 ·
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2
Undergrad How to find the phase shift and amplitude ratio
  • vtaela
  • · Replies 3 ·
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3
Oliver Sacks & pushing the shuttle off course
  • atyy
  • · Replies 8 ·
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8
Undergrad A Few Questions about Resonance
  • Daolothe
  • · Replies 4 ·
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4
Undergrad Purpose of natural log in gibbs free energy equation
  • thedy
  • · Replies 13 ·
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13
Graduate Studying Longitudinal Oscillations of a Stick
  • Numeriprimi
  • · Replies 2 ·
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2
Undergrad What do you know about ion thrusters?
  • zachmer
  • · Replies 5 ·
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5
Graduate What is the correct way to calculate streamlines of a vector field
  • Jonsson
  • · Replies 2 ·
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2
Undergrad Can someone verify a computational result for me?
  • cowmoo32
  • · Replies 2 ·
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2
Undergrad Vacuum chamber for filling bee comb
  • challenger
  • · Replies 5 ·
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5
Graduate Transverse Wave equation for a string of changing length?
  • czechman45
  • · Replies 2 ·
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2
Undergrad Classical spin system. Ising model.
  • LagrangeEuler
  • · Replies 2 ·
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2
Undergrad Hookah Principles: Understand the Math Behind it
  • sydfremmer
  • · Replies 9 ·
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9
High School Downloadable incandescent spectrum
  • momar
  • · Replies 1 ·
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1
High School Why does air density decrease as we go higher in altitude?
  • sgstudent
  • · Replies 7 ·
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7
High School What sort of experiments can be doen with Graphite ?
  • th3whit3fang
  • · Replies 8 ·
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8
Undergrad What is a simple rule of thumb for determining beat patterns of multiple waves?
  • Happle
  • · Replies 17 ·
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17
Undergrad Contact angle of liquid drop on solid surface.
  • amk_dbz
  • · Replies 1 ·
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1
Undergrad Chemitrails/Contrail and factors
  • Numeriprimi
  • · Replies 2 ·
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2
Undergrad Understanding the Phase Constant in y(x,t) Equation
  • Sciencer
  • · Replies 1 ·
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1
Undergrad Why does Neon gas sometimes glow brilliant white ?
  • DeepCut
  • · Replies 13 ·
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13
High School Can metal skewers help bake the perfect cake?
  • davidsimpson
  • · Replies 15 ·
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15