Classical Physics Forum

Post thread
Join expert classical physics discussion on the principles developed before the rise of relativity and quantum mechanics. Including mechanics, electrodynamics, thermodynamics, optics.

Sub-forums

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 Is x{hat} a unit vector and why is theta a vector?
  • cgreeleybsu
  • · Replies 3 ·
Replies
3
Undergrad Do linear AND dispersive waves exist outside of QM?
  • LarryS
  • · Replies 1 ·
Replies
1
Undergrad The continuity equation and the divergence
  • wuwei
  • · Replies 3 ·
Replies
3
Undergrad Mathematical Procedure for Obtaining Velocity Profile in Laminar Flow
  • Andrea Vironda
  • · Replies 8 ·
Replies
8
Insights A New Interpretation of Dr. Walter Lewin's Paradox - Comments
  • rude man
  • · Replies 64 ·
3
Replies
64
Undergrad Wave equation and the d'Alembert solution
  • Robin04
  • · Replies 18 ·
Replies
18
Undergrad How Do I Calculate the Mass of a Planet Using a Simulation?
  • Levi Woods
  • · Replies 4 ·
Replies
4
Undergrad Are Reynolds Vortices a Real Scientific Phenomenon?
  • stockzahn
  • · Replies 5 ·
Replies
5
Undergrad Microphones at longer wavelengths than their size?
  • The Bill
  • · Replies 10 ·
Replies
10
Undergrad Can Mummies Be Used as Fuel for Steam Locomotives?
  • Tiger Blood
  • · Replies 2 ·
Replies
2
High School Is the Tsiolkovsky Rocket Equation Worth Tattooing?
  • Nathan1126
  • · Replies 2 ·
Replies
2
Undergrad What is a stochastische dynamische systeme?
  • Another
  • · Replies 3 ·
Replies
3
Undergrad Rippled surface on lake ends abruptly
  • greypilgrim
  • · Replies 3 ·
Replies
3
Undergrad What kind of old physics tube is this?
  • greypilgrim
  • · Replies 4 ·
Replies
4
High School Tearing Tape: Understanding the Differences in Fracture Behavior
  • JTC
  • · Replies 4 ·
Replies
4
High School Frequnncy and 1/t, I don't really understand
  • SsagatroNN
  • · Replies 2 ·
Replies
2
High School Solar cells - how do they repeat the process?
  • Emily0203
  • · Replies 3 ·
Replies
3
Undergrad Removing a node in Y-Δ transform
  • Conductivity
  • · Replies 1 ·
Replies
1
Undergrad One dimensional wave, function of a wave
  • Taylor_1989
  • · Replies 2 ·
Replies
2
Undergrad How have changes in table tennis racket design affected the game?
  • prashantakerkar
  • · Replies 8 ·
Replies
8
Undergrad What is the origin of x=e^(rt) in Simple Harmonic Motion?
  • velvetmist
  • · Replies 5 ·
Replies
5
Undergrad Understanding Waves on a String
  • Selfless_Gene
  • · Replies 10 ·
Replies
10
High School Why does a Moebius strip twist unevenly along its length?
  • Harlan
  • · Replies 5 ·
Replies
5
Undergrad Paddle convex and concave sides and forward propulsion
  • fog37
  • · Replies 1 ·
Replies
1
Undergrad Why does the wave equation describe certain phenomena
  • Fibo112
  • · Replies 8 ·
Replies
8
High School Energy of a Wave: Amplitude vs Frequency
  • Lyakhnitskiy Dmitriy
  • · Replies 3 ·
Replies
3
Undergrad Helmholtz resonator with multiple necks--formula?
  • EmilioL
  • · Replies 10 ·
Replies
10
Undergrad Classical waves and the Doppler shift
  • Phys12
  • · Replies 5 ·
Replies
5
Undergrad SI definition of second: what day/year is the reference year
  • Patrick Aberdeen
  • · Replies 3 ·
Replies
3
High School What the equal sign means in physics
  • ado sar
  • · Replies 34 ·
2
Replies
34
Undergrad Physical examples of different types of bifurcation
  • Jezza
  • · Replies 1 ·
Replies
1
Undergrad Effect of impedance changes less than a wavelength
  • BOYLANATOR
  • · Replies 4 ·
Replies
4
Undergrad Could Different Attractors Explain Variations in Lyapunov Exponents?
  • Nono92
  • · Replies 1 ·
Replies
1
High School Why Does a New Syringe Have an Open Piston?
  • Leodoc
  • · Replies 5 ·
Replies
5
Undergrad Liouville operator time dependency
  • SchroedingersLion
  • · Replies 3 ·
Replies
3
Graduate Modeling and simulating a 2D Turbulent flow
  • jamalkoiyess
  • · Replies 1 ·
Replies
1
Undergrad When to use which dimensionless number
  • member 428835
  • · Replies 114 ·
4
Replies
114
Undergrad Diameter affecting string's impedance
  • Senim Silla
  • · Replies 1 ·
Replies
1
High School Interval scale -- very basic question
  • Vital
  • · Replies 3 ·
Replies
3
High School Understand Units: Physics for High School Graduating Students
  • Matt Smith
  • · Replies 14 ·
Replies
14
Undergrad Some help with deriving svedberg equilibrium equatio please
  • HS-experiment
  • · Replies 2 ·
Replies
2
Undergrad Fluid separation in boundary layer
  • dRic2
  • · Replies 6 ·
Replies
6
High School Tides and Local G: Investigating the Relationship Through Long-Term Observations
  • JeffEvarts
  • · Replies 3 ·
Replies
3
Graduate What are the oscillation modes in low-gravity capillary-dominated flow?
  • member 428835
  • · Replies 6 ·
Replies
6
Undergrad How can I amplify and shift the phases of a complex waveform in MATLAB?
  • Natalie Johnson
  • · Replies 6 ·
Replies
6
Undergrad Anyone recognize this equation?
  • physea
  • · Replies 9 ·
Replies
9
Undergrad Pneumatic/hydraulic energy storage
  • physea
  • · Replies 7 ·
Replies
7
Undergrad Head loss in a circuit of pump and pipes
  • physea
  • · Replies 14 ·
Replies
14
Undergrad Suction Cavitation in Pumps: Causes and Frequency
  • physea
  • · Replies 2 ·
Replies
2
Undergrad I don't understand the derivation of the wave equation
  • Clara Chung
  • · Replies 7 ·
Replies
7
Graduate Calculating Indices: Solve the Mystery
  • John Fennie
  • · Replies 7 ·
Replies
7
High School Is what is depicted in this fake video possible?
  • David Neves
  • · Replies 21 ·
Replies
21
Graduate Fluids and the no-penetration condition
  • member 428835
  • · Replies 8 ·
Replies
8
Undergrad Interpretation of spatially dependent convective derivative
  • Mzzed
  • · Replies 5 ·
Replies
5
Undergrad Understanding Equation (2.34) in Heald and Marion: A Step-by-Step Derivation
  • John Fennie
  • · Replies 5 ·
Replies
5
Undergrad Physics -- Need help understanding the concept of resonance please
  • danial3333
  • · Replies 5 ·
Replies
5
Undergrad Problem sets between universities
  • Ethan Mullen
  • · Replies 1 ·
Replies
1
Undergrad Higbie's penetration theory in a bubble
  • dRic2
  • · Replies 4 ·
Replies
4
Undergrad How to identify if a system exhibits chaos?
  • Tahmeed
  • · Replies 2 ·
Replies
2
Undergrad What Are the Best Dimensions and Materials for High Vacuum Transparent Tubes?
  • Kamil19991
  • · Replies 6 ·
Replies
6
High School Unit Not Homogeneous: Understanding the Formula
  • KingTubby
  • · Replies 1 ·
Replies
1
Undergrad Glass Breaking -- What causes this characteristic fracture pattern?
  • Moayd Shagaf
  • · Replies 1 ·
Replies
1
Undergrad Chaos vs purely exponentially growing systems
  • Sunny Singh
  • · Replies 3 ·
Replies
3
Undergrad Limitations of Dimensional Analysis in Predicting Proportional Relationships
  • physics user1
  • · Replies 6 ·
Replies
6
Undergrad Can the Differential Pass in the Beginning Part of a Change in Vector Product?
  • Andrea Vironda
  • · Replies 1 ·
Replies
1
High School Is Math the Key to Understanding Energy Transfer in Waves?
  • sanpokhrel
  • · Replies 5 ·
Replies
5
High School Unlocking Symmetry: The Ultimate Guide to Intuitive Reasoning
  • Leo Authersh
  • · Replies 2 ·
Replies
2
High School Resonance relationship with glass shatter
  • TT0
  • · Replies 4 ·
Replies
4
Undergrad Relationship between standing wave and resonance?
  • TT0
  • · Replies 2 ·
Replies
2
Undergrad Debunking the Myth of the Devil's Racetrack in Death Valley
  • David Neves
  • · Replies 9 ·
Replies
9
High School Does any function of the form y=f(x-vt) represent a wave?
  • randomgamernerd
  • · Replies 15 ·
Replies
15
High School Simple machines that are used in Weapons
  • Antuntun
  • · Replies 5 ·
Replies
5
Undergrad D'Alembert's Solution – Domain of dependence
  • FluidStu
  • · Replies 2 ·
Replies
2
Undergrad Shear Rate in a Rectangular Channel
  • quantstr
  • · Replies 6 ·
Replies
6
Undergrad Using physics to predict the outcome of a roulette wheel
  • borson
  • · Replies 12 ·
Replies
12
High School Feeling Earth's Rotation: A Teleported Alien's Perspective
  • Ricky Lalduhzuala
  • · Replies 4 ·
Replies
4
High School Stretching (tearing) of string
  • DesertFox
  • · Replies 8 ·
Replies
8
Undergrad Where does the formula I = -e/T comes from?
  • Syazani Zulkhairi
  • · Replies 2 ·
Replies
2
Undergrad What Unit Results from Dividing Joules per Kilogram by Meters?
  • Timothy Schablin
  • · Replies 4 ·
Replies
4
Graduate Is this an application of the Virial theom?
  • weiwei
  • · Replies 2 ·
Replies
2
High School How can Greenland lose 269b tons/year and loose only 269km3?
  • IvicaPhysics
  • · Replies 4 ·
Replies
4
Undergrad Fourier analysis and the sinusoidal plane wave
  • BacalhauGT
  • · Replies 7 ·
Replies
7
High School What is the direction of the wind based on flag direction
  • TheWonderer1
  • · Replies 15 ·
Replies
15
High School What do the d and p symbols mean in physics
  • Quantum Velocity
  • · Replies 5 ·
Replies
5
Undergrad History of brachistochrone and catenary
  • zwierz
  • · Replies 1 ·
Replies
1
Undergrad What is the significance of bandwidth in hydraulic transmission lines?
  • CyberneticsInside
  • · Replies 8 ·
Replies
8
High School Why does end correction in pipes change with radius
  • Tyrone Sawyer
  • · Replies 1 ·
Replies
1
Undergrad How many degrees of freedom does a swan's neck have
  • mani m
  • · Replies 9 ·
Replies
9
Undergrad Understanding the Development of Laminar Jet Flow - Tips from Experts
  • member 428835
  • · Replies 4 ·
Replies
4
High School Walter Lewin videos -- why ± 0.5 cm uncertainty why not ± 0.1?
  • benny91xp
  • · Replies 3 ·
Replies
3
High School How Can You Reattach Broken Glasses Without Reheating the Atoms?
  • Blue Scallop
  • · Replies 2 ·
Replies
2
High School How to specify direction in 3 dimensional world
  • donaldparida
  • · Replies 2 ·
Replies
2
High School Hammer / feather moon drop clip
  • houlahound
  • · Replies 5 ·
Replies
5
Undergrad Dissolved gas concentration in undersaturated liquid column
  • MarkBurg
  • · Replies 7 ·
Replies
7
Undergrad Thin film around circle and ignoring curvature
  • member 428835
  • · Replies 6 ·
Replies
6
Undergrad Measurement precision question
  • calinvass
  • · Replies 3 ·
Replies
3
Undergrad Streamlines around a sphere (qualitative)
  • member 428835
  • · Replies 6 ·
Replies
6
High School Some questions about terminology
  • AndyCh
  • · Replies 6 ·
Replies
6
Undergrad Why Does a Fluid Jet Become Unstable at Wavelengths Exceeding Its Perimeter?
  • larsa
  • · Replies 1 ·
Replies
1
Undergrad What is the significance of calculating the average value of cos?
  • srhelfrich
  • · Replies 6 ·
Replies
6