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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 Phase Speed of Wave in non-relativistic Doppler Shift Derivation
  • unified
  • · Replies 1 ·
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1
Undergrad How does the Lota Bowl water experiment work?
  • Xenon02
  • · Replies 13 ·
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13
Undergrad Solving for ##\theta## in a Trigonometric Equation
  • phantomvommand
  • · Replies 7 ·
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7
High School Question about Gravity and my hands
  • Einstein60
  • · Replies 10 ·
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10
Undergrad Can Spider Silk Conduct Electricity?
  • Delta2
  • · Replies 2 ·
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2
High School Measuring change in g with height (TV program many years ago)
  • CWatters
  • · Replies 21 ·
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21
High School When do marbles behave like a liquid in a beaker?
  • beamthegreat
  • · Replies 3 ·
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3
Undergrad If I clap once to a wall, and then walk forward, will I hear an echo?
  • phantomvommand
  • · Replies 21 ·
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21
High School Question about stress - strain graph and definition of hardness
  • songoku
  • · Replies 4 ·
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4
Undergrad Are Peak Moment and Peak Torque Equivalents in Biodex Dynamometry Measurements?
  • teokevin11
  • · Replies 3 ·
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3
Undergrad Water Waves Over Obstacles: Higher Frequencies Grow, Not Decay
  • person123
  • · Replies 3 ·
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3
Undergrad What Keeps Water in a Straw When It's Removed from a Glass?
  • MattGeo
  • · Replies 12 ·
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12
Undergrad Fluid Viscosity & Viscous Friction Between Plates
  • Dario56
  • · Replies 4 ·
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4
High School Potential energy in standing wave compared to traveling wave
  • versine
  • · Replies 1 ·
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1
Undergrad Does a field affect the originating entity?
  • synch
  • · Replies 6 ·
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6
Challenge Experimental Physics Challenge, June 2021
  • Twigg
  • · Replies 8 ·
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8
Undergrad What would it take to eliminate leap years?
  • some bloke
  • · Replies 48 ·
2
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48
Graduate Why is the sinusoidal considered the fundamental frequency?
  • jaydnul
  • · Replies 22 ·
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22
Undergrad Catching Space Debris: Chameleon-Inspired Capture System
  • CdE62021
  • · Replies 12 ·
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12
High School Bullet lead with given parameters
  • gr3gthepilot
  • · Replies 2 ·
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2
Undergrad The dramatic difference between wet and dry sphere splashes
  • Russ Edmonds
  • · Replies 1 ·
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1
Graduate Which equation describes surface waves in a fluid on the same scale?
  • hunt_mat
  • · Replies 0 ·
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0
Undergrad Amount of Noise extinction in Acrylic glass per thickness in mm
  • Tech_Rizzle
  • · Replies 18 ·
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18
Undergrad Is physics of living matter an undiscovered territory?
  • kinchit bihani
  • · Replies 8 ·
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8
Undergrad How to ensure an equation is dimensionless when it includes "Debye"
  • bumblebee77
  • · Replies 2 ·
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2
Undergrad How does a standing wave form?
  • phantomvommand
  • · Replies 8 ·
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8
Undergrad Graduation of air flow inside a vacuum chamber
  • kaigoss69
  • · Replies 4 ·
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4
Undergrad Frost on roof window melts in lines
  • greypilgrim
  • · Replies 11 ·
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11
Undergrad Multiplying Uncertainties in Different Units
  • e2m2a
  • · Replies 4 ·
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4
Undergrad Longitudinal waves on a string
  • zongo123
  • · Replies 7 ·
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7
High School Doppler effect in moving medium?
  • xxxyyy
  • · Replies 1 ·
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1
High School Understanding Vacuum: 15HgV, 25HgV & High Viscosity Fluid
  • FiveO
  • · Replies 7 ·
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7
High School Why doesn't the Earth at the equator experience a sonic boom?
  • bo reddude
  • · Replies 53 ·
2
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53
Graduate Ground Penetrating Radar formula
  • PeterPeter
  • · Replies 3 ·
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3
High School How to Compile a Report on Experiments: Resources & Tips
  • xxxyyy
  • · Replies 1 ·
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1
Undergrad The kilogram and Planck’s constant
  • sophiecentaur
  • · Replies 18 ·
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18
High School Defining 1 Second: The History and Science Behind Time Measurement
  • Pedroski55
  • · Replies 17 ·
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17
High School How Does Phase Change Affect the Equation of a Stationary Wave?
  • songoku
  • · Replies 12 ·
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12
Graduate Calculating noise of a transducer from molecular vibration
  • curiously new
  • · Replies 2 ·
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2
High School Measuring a change in gravity - thought experiment question
  • brajesh
  • · Replies 8 ·
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8
High School Apparent missing negative phase oscillation energy - where is it?
  • harrylentil
  • · Replies 11 ·
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11
Undergrad How to stay warm lost in the wilderness in winter?
  • gary350
  • · Replies 1 ·
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1
High School Variation of air density with height
  • brotherbobby
  • · Replies 8 ·
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8
High School Why is Gaussian charge not equivalent to SI charge?
  • songoku
  • · Replies 14 ·
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14
Undergrad The world from a bat's perspective (sonic images)
  • Killtech
  • · Replies 21 ·
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21
Graduate Dx in an integral vs. differential forms
  • Trying2Learn
  • · Replies 6 ·
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6
Undergrad Where Can I Find Germanium PIN Photodiodes for Sale?
  • elopariel
  • · Replies 1 ·
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1
High School Implicit error margins based on significant figures
  • johann1301h
  • · Replies 18 ·
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18
Undergrad Why is it claimed that Betz's limit is a law?
  • normandajc
  • · Replies 30 ·
2
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30
Undergrad Units of trigonometric functions?
  • John Greger
  • · Replies 7 ·
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7
Graduate Solving Kepler's Equation Over Three Centuries
  • Will Flannery
  • · Replies 14 ·
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14
Discovering Drum Head Patterns for Music Education
  • Curiousgeorge77
  • · Replies 7 ·
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7
High School Photo of crosswalk lines distorted by tires action-reaction
  • ezfzx
  • · Replies 16 ·
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16
High School Length is the measure of intervals in space?
  • sahilmm15
  • · Replies 11 ·
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11
High School How to Linearize an R vs θ graph (distance vs angle)
  • Bianca526
  • · Replies 6 ·
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6
High School What is the wave intensity formula for sound?
  • CoolGod
  • · Replies 2 ·
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2
Undergrad What is the integral of energy?
  • Boltzman Oscillation
  • · Replies 22 ·
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22
High School Can physics deal with the existence of Pi?
  • richard9678
  • · Replies 61 ·
3
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61
High School Node Placement in Stationary Waves on Pool Surfaces
  • jaumzaum
  • · Replies 7 ·
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7
High School Help with IB Extended Essay Physics Experiment Ideas
  • utp9
  • · Replies 3 ·
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3
Undergrad Error analysis: simple but confusing matter
  • haushofer
  • · Replies 3 ·
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3
Undergrad Why does energy travel in waves?
  • JayJ
  • · Replies 13 ·
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13
High School Why does my head feel heavy when I go out on a cold weather day?
  • iVenky
  • · Replies 8 ·
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8
High School What is the RMS value in this context?
  • Frigus
  • · Replies 11 ·
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11
Undergrad Coexistence of Solid and Liquid Matter: Conditions for Existing One Phase?
  • fxdung
  • · Replies 5 ·
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5
Undergrad Air density with a significantly higher sea level
  • CMaso
  • · Replies 5 ·
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5
High School Why is squaring used in physics equations?
  • Pjeter Schornstein
  • · Replies 13 ·
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13
High School What is the difference between "Unitless" and "Dimensionless"?
  • jaumzaum
  • · Replies 7 ·
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7
High School Is energy considered to be physical?
  • Robert P
  • · Replies 4 ·
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4
Insights Intro to Physically Reasonable Waves on a String
  • Redbelly98
  • · Replies 4 ·
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4
High School Help understanding the physics of airflow
  • Freixas
  • · Replies 3 ·
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3
High School Upside down buoyancy (Have you seen this?)
  • kuruman
  • · Replies 3 ·
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3
High School Dangers with a diving bell combined with a long snorkel
  • Philip Koeck
  • · Replies 21 ·
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21
Undergrad Liquid soap pulsing as it's drawn into a syringe
  • puc
  • · Replies 17 ·
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17
Undergrad What are the applications of dimensional analysis and why does it work?
  • Leo Liu
  • · Replies 5 ·
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5
Undergrad Vibrations of waves with pinned vs free boundary conditions
  • member 428835
  • · Replies 10 ·
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10
Graduate How to get the second line of this equation from the first one?
  • zb23
  • · Replies 5 ·
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5
High School Non-linear Behavior, Chaos to Order
  • Secan
  • · Replies 7 ·
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7
Graduate What is the difference between aggregation, nucleation and growth?
  • Sciencestd
  • · Replies 4 ·
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4
High School Dropsheet-duct tape wall in The Martian
  • DaveC426913
  • · Replies 7 ·
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7
Undergrad Child's experiment to weigh air
  • lloyd709
  • · Replies 59 ·
2
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59
Undergrad Are there waves that go up and down without going below zero displacement?
  • danielhaish
  • · Replies 25 ·
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25
Undergrad New insights in penguin physics
  • jtbell
  • · Replies 10 ·
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10
Undergrad A real life problem with plumbing at my house
  • iVenky
  • · Replies 12 ·
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12
High School Can Vibranium Realistically Be Used in Hyperloop Construction?
  • alforwood
  • · Replies 6 ·
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6
High School Measurement and Uncertainities
  • Anonymous1
  • · Replies 4 ·
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4
Undergrad The total energy stored in a battery (theory/formula)
  • feynman1
  • · Replies 7 ·
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7
Undergrad Why volume is conserved but not the surface area?
  • Adesh
  • · Replies 33 ·
2
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33
High School Exponential formula for Excel sheet
  • MrNewton
  • · Replies 2 ·
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2
High School How to calculate the amplification of a cone
  • gary350
  • · Replies 1 ·
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1
Graduate Through the eyes of a being that can see two in dimensions
  • Lisastronomy
  • · Replies 4 ·
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4
Undergrad Blowing Bubbles in Space: Can You Create a Giant Bubble in the Vacuum of Space?
  • mollwollfumble
  • · Replies 9 ·
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9
Graduate Where Can I Submit a 15-Page Article on Educational Largangian Mechanics?
  • wrobel
  • · Replies 6 ·
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6
High School Animation of a standing wave formed by components from a free end
  • pkc111
  • · Replies 11 ·
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11
Undergrad Solve the Mystery of the Alarm Signal: Duncan's Story
  • duncan108
  • · Replies 37 ·
2
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37
Undergrad Solve Mystery Equation - Get Insight into Relevance & Contents of Brackets
  • emrock
  • · Replies 13 ·
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13
Undergrad Difficult Series Battery Problem
  • Patrick Underwood
  • · Replies 1 ·
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1
High School How is frost possible at 39 degrees F?
  • gary350
  • · Replies 26 ·
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26
Graduate Molecules Aggregating on a Surface that includes a Scratch
  • Sciencestd
  • · Replies 3 ·
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3
Graduate What is meant by ##\rho_{xx}##?
  • aliens123
  • · Replies 11 ·
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11