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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 Would a Dyson sphere need a "relief valve?"
  • zuz
  • · Replies 4 ·
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4
Graduate Amplitude of a stationary wave
  • Josielle Abdilla
  • · Replies 3 ·
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3
High School Why are there no bubbles in a pipette when pressure is released?
  • fresh_42
  • · Replies 1 ·
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1
Undergrad Division of a physical quantity
  • akashpandey
  • · Replies 5 ·
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5
Undergrad Berkeley Physics Course- vol 3
  • peace
  • · Replies 1 ·
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1
High School Why does coffee in a glass leaves its signatory on the surface?
  • Zohar
  • · Replies 5 ·
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5
Undergrad Solving the Paradox: A Dynamical Model of Disease Spread
  • greswd
  • · Replies 26 ·
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26
High School Does a rubber mat on a device prevent static build up
  • lee123456789
  • · Replies 3 ·
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3
Undergrad Cavity resonances between two long parallel plates
  • nawidgc
  • · Replies 9 ·
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9
Undergrad Standing Waves vs Traveling Waves
  • sayetsu
  • · Replies 9 ·
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9
Undergrad Writing about a simple physics lab
  • sayetsu
  • · Replies 3 ·
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3
Undergrad Nanoantennae calculation for covid-19
  • qnach
  • · Replies 3 ·
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3
High School Diffusion behavior of particulates
  • chirhone
  • · Replies 7 ·
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7
High School What Interesting Topics Can Be Explored with Dew Points and Relative Humidities?
  • NewtonIsWrong
  • · Replies 3 ·
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3
Graduate Help with Math: 2.28-2.29 to 2.31-2.34
  • daisy496
  • · Replies 5 ·
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5
Undergrad How can I understand valence bond theory and VSEPR theory?
  • Frigus
  • · Replies 4 ·
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4
Undergrad Why does the arrangement of the Periodic Table make no sense?
  • Bonkus Klunkit
  • · Replies 2 ·
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2
Graduate What are the most important open questions in classical physics?
  • andresB
  • · Replies 6 ·
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6
High School Another doubt I had while reading Feynman Lectures
  • Rishabh Narula
  • · Replies 1 ·
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1
High School Does a vernier caliper have doubtful figures?
  • Yoseph Santoso
  • · Replies 24 ·
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24
Undergrad Why Do Fractions Like 2/3 and 3/2 Frequently Appear in Physics Problems?
  • FallenApple
  • · Replies 9 ·
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9
Undergrad Derivatives of Energy: 2nd Time Rate of Change, Useless in Physics?
  • dsaun777
  • · Replies 4 ·
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4
Undergrad Removing moisture from polyester staples
  • ravindrar
  • · Replies 4 ·
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4
High School Calculus for Beginners: Basics & Examples
  • Frigus
  • · Replies 7 ·
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7
High School Hydraulic resistor as a constriction in a pipe
  • etotheipi
  • · Replies 4 ·
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4
High School Why does Sunset look different from Sunrise?
  • gary350
  • · Replies 23 ·
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23
Undergrad Reynolds Number in Organism-Fluid Interactions
  • vetenar
  • · Replies 4 ·
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4
Undergrad Why do Bubbles oscillate sinusoidally?
  • Trying2Learn
  • · Replies 3 ·
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3
High School How is a Scientific law/theory's accuracy tested?
  • LittleRookie
  • · Replies 16 ·
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16
Undergrad EV per Torr*cm -- What does it mean?
  • DariusP
  • · Replies 3 ·
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3
High School Reading a Book about Air Sustained Structures....
  • AlexVille
  • · Replies 3 ·
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3
High School 100sqft wormhole from sea level to outer space?
  • shintashi
  • · Replies 6 ·
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6
High School I have a basic question about energy :)
  • Khal N
  • · Replies 27 ·
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27
High School Blocking all type of energies/waves/signals
  • oror
  • · Replies 1 ·
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1
Undergrad Question about Waves -- What does "Elongation" refer to?
  • math04
  • · Replies 3 ·
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3
Undergrad Resonance gets sharper just by increasing the resonance freq, why?
  • Aaron121
  • · Replies 5 ·
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5
High School Why are Biological Materials easily broken despite being very strong?
  • TheShermanTanker
  • · Replies 1 ·
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1
High School Can Smaller Chequers Change the Color of a Spinning Red and Green Pattern?
  • cmb
  • · Replies 14 ·
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14
Undergrad Using the ni Formula from a Paper with N=7: What do I Get?
  • rabbed
  • · Replies 2 ·
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2
High School Change in field strength if two variables are incremented at the same time
  • etotheipi
  • · Replies 7 ·
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7
High School Raindrops Cracking Windshields
  • jedishrfu
  • · Replies 4 ·
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4
High School Where Does Energy Go in Young's Double Slit Experiment?
  • Admiralibr123
  • · Replies 12 ·
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12
Graduate How Do Van Der Waals Forces Influence Adhesion in Glue and Gecko Setae?
  • siddharth5129
  • · Replies 2 ·
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2
Undergrad How can we quickly locate an avalanche victim using technical tools?
  • hagopbul
  • · Replies 25 ·
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25
High School Stratified Flows: Definition and Physical Meaning
  • math04
  • · Replies 2 ·
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2
Undergrad Why is this equation used to much to describe Waves?
  • math04
  • · Replies 1 ·
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1
Graduate Synchronization from dissipation?
  • Demystifier
  • · Replies 2 ·
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2
Undergrad Why do bubbles coalesce in liquids?
  • chef
  • · Replies 9 ·
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9
High School What are the general calculus concepts used in classical physics?
  • DeltaForce
  • · Replies 3 ·
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3
High School How to tell if a quantity is defined as a derivative or a ratio
  • etotheipi
  • · Replies 4 ·
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4
High School MRI vs Color X-Ray Technology: What Are the Differences and Benefits?
  • artis
  • · Replies 12 ·
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12
Undergrad Need advice on vacuum / suction experiment
  • Blackie
  • · Replies 7 ·
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7
High School Calibrating measurements from scratch
  • atracious
  • · Replies 6 ·
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6
High School What is the definition of angle?
  • Coder Hashtag
  • · Replies 5 ·
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5
Graduate Signal Processing and the Duffing ODE
  • member 428835
  • · Replies 5 ·
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5
High School Gaining Perspective on Valid Digits in Physics Problems
  • johann1301h
  • · Replies 6 ·
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6
Undergrad What distinguishes pressure from normal stress in bird transport phenomena?
  • Est120
  • · Replies 1 ·
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1
High School What is the meaning of the word "resolved"?
  • Haorong Wu
  • · Replies 6 ·
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6
Undergrad Difference between stationary and steady state
  • Richard Parker
  • · Replies 8 ·
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8
Undergrad Why a massive body is easier to break than a tiny body?
  • fxdung
  • · Replies 5 ·
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5
High School Shifting of a Cosine Curve with negative phase angle values
  • warhammer
  • · Replies 9 ·
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9
Undergrad In what cases does dimensional analysis fail?
  • VVS2000
  • · Replies 29 ·
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29
High School What exactly is Dimensional Analysis?
  • DeltaForce
  • · Replies 2 ·
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2
High School Unit of Gravitational Constant Explained
  • Mohamad
  • · Replies 1 ·
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1
High School Help with understanding the Doppler effect
  • frostysh
  • · Replies 64 ·
3
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64
High School Filling the spool of a spinning reel with braid & monofilament
  • member 534986
  • · Replies 8 ·
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8
Undergrad What is the connection between holograms and the implicate order?
  • lucas_
  • · Replies 19 ·
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19
Insights Learn the Basics of Dimensional Analysis
  • Orodruin
  • · Replies 7 ·
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7
Undergrad What is the correct phrasing for matrix Bellman nonhomogeneous equations?
  • nomadreid
  • · Replies 5 ·
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5
Undergrad Calculating Energy and Q of a Vibrating String
  • starbaj12
  • · Replies 1 ·
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1
High School Getting a newspaper page to stick to a wall using wooden pencil
  • johann1301h
  • · Replies 9 ·
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9
High School Does warm air rise or does cold air sink?
  • somega
  • · Replies 6 ·
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6
Undergrad The fast Fourier transform and droplet frequencies
  • member 428835
  • · Replies 13 ·
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13
High School A magic number or only a number?
  • Ssnow
  • · Replies 2 ·
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2
Undergrad Thread attempt 2: Edge physics trying to understand
  • paradisePhysicist
  • · Replies 43 ·
2
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43
Graduate What Defines Waves as Resonant Generated?
  • math04
  • · Replies 1 ·
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1
Undergrad Basic doubt on chain rule in DAlemberts soln to wave equation
  • bksree
  • · Replies 4 ·
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4
High School Why doesn't the ink in a pen refill flow back if I hold it inverted?
  • Benjamin_harsh
  • · Replies 4 ·
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4
Undergrad D'Alembert's solution to the wave equation
  • bksree
  • · Replies 5 ·
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5
Undergrad Understanding Waves: The Importance of Fourier Analysis in Undergraduate Physics
  • kent davidge
  • · Replies 3 ·
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3
High School Can He be used as a safer alternative to H in blimps?
  • DaveC426913
  • · Replies 24 ·
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24
Undergrad Optimal Copper Pipe Size for Misting System
  • ljmorlock
  • · Replies 1 ·
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1
Undergrad Would an unstable emulsion separate in the abscense of gravity? How?
  • thermodragon
  • · Replies 4 ·
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4
Undergrad I'm confused about the effect of gravity anomalies on sea height
  • Jaams
  • · Replies 7 ·
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7
High School Can color be used for measuring density?
  • Isolde Wilde
  • · Replies 11 ·
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11
Undergrad High resolution visible spectrum
  • Teck
  • · Replies 27 ·
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27
Undergrad Tone vs hole size & spacing in a short tube
  • JT Smith
  • · Replies 8 ·
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8
Graduate Which liquids do not supercool?
  • thermodragon
  • · Replies 2 ·
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2
Graduate Is there a passive molecular flow 'diode'?
  • cmb
  • · Replies 2 ·
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2
Undergrad Is this allowed? - Harmonic oscillation
  • APUGYael
  • · Replies 7 ·
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7
Undergrad How is Peter Debye's name pronounced?
  • cmb
  • · Replies 2 ·
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2
Undergrad Understanding LaPlace's Law: Tension in Pressure Vessels Explained
  • gkiverm123
  • · Replies 1 ·
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1
Undergrad How do you exactly calculate the theoretical maximum efficiency of an LED?
  • HomeExperiement
  • · Replies 4 ·
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4
Graduate Calculating Flow of Helium in a Verticle Pipe
  • Q_Goest
  • · Replies 1 ·
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1
Graduate Transform Tables: A Comprehensive Listing
  • krindik
  • · Replies 1 ·
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1
Graduate Combining Advective Transport Equations for Two Solutes: Help Needed!
  • nikokampman
  • · Replies 1 ·
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1
Undergrad Joukowsky Equation: Applies to Gases Too?
  • lambdaLoverD
  • · Replies 1 ·
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1
Graduate How Accurate Are Calculated Diffusion Coefficients of H2 and He into Air?
  • Clausius2
  • · Replies 1 ·
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1
Graduate Will soldering be an effective method for constructing a microwave resonator?
  • Spurious J
  • · Replies 1 ·
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1
High School What is the volume occupied by a molecule?
  • Fabrizio Vassallo
  • · Replies 12 ·
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12