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 Heat radiation in vacuum
  • ravindrar
  • · Replies 19 ·
Replies
19
Undergrad Getting back Maxwell's vector equations from their spinor version
  • grzz
  • · Replies 6 ·
Replies
6
  • Redirect
Why does the base of the stapes (oval window) have a lower amplitude in the middle ear?
  • DrBanana
  • · Replies – ·
Replies
–
Undergrad What happens to a person's body in space without a spacesuit?
  • Pelf41
  • · Replies 25 ·
Replies
25
Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property?
  • swissgirl1999 Refer
  • · Replies 60 ·
3
Replies
60
Undergrad Sound waves on the Sun
  • sevensages
  • · Replies 11 ·
Replies
11
Undergrad Ampère's mercury experiment and Aharonov-Bohm: same message?
  • Roberto Pavani
  • · Replies 15 ·
Replies
15
Undergrad Why is water pressure increased in a plastic bag in a bucket?
  • ImaginaryTango
  • · Replies 75 ·
3
Replies
75
Undergrad Our Mathematical Universe book -- Since when does light contain voltage?
  • sevensages
  • · Replies 23 ·
Replies
23
High School Deriving the "third" kinematic equation using graphs
  • brotherbobby
  • · Replies 22 ·
Replies
22
High School Tennis Balls in the Ocean
  • some bloke
  • · Replies 24 ·
Replies
24
Undergrad Precision Microwave-Background Fluctuations
  • sevensages
  • · Replies 8 ·
Replies
8
High School Another dumb SocMed quiz
  • DaveC426913
  • · Replies 5 ·
Replies
5
Graduate Is Energy conservation among sectors (EM,GR,QM) a principle?
  • Roberto Pavani
  • · Replies 28 ·
Replies
28
Undergrad Textbook description of R##\ddot{\text o}##mer's light speed calculation
  • brotherbobby
  • · Replies 27 ·
Replies
27
High School Why would sailboat racers prefer a full keel over a fin keel?
  • DaveC426913
  • · Replies 39 ·
2
Replies
39
Undergrad DH Mt Bike - Optimizing Drop Landing Ramp Profile
  • erobz
  • · Replies 37 ·
2
Replies
37
High School A question about the rotation of points on a wheel
  • BadgerBadger92
  • · Replies 11 ·
Replies
11
Undergrad Do vocal tract resonances assist a singer's pitch control?
  • Swamp Thing
  • · Replies 14 ·
Replies
14
Undergrad Capacitor Voltages at t = 0: Zero or Split?
  • danadak
  • · Replies 41 ·
2
Replies
41
Undergrad Are the basic axioms of thermodynamics demonstrated experimentally?
  • drzbigniew31
  • · Replies 13 ·
Replies
13
Undergrad The stream from the bottom of the bottle becomes short when the bottle is filled from above
  • Mihal
  • · Replies 7 ·
Replies
7
High School Equine Physics -- When a horse gets stuck going up a steep slope
  • Vasi
  • · Replies 15 ·
Replies
15
Undergrad Mach's principle vs two counter-rotating buckets
  • Roberto Pavani
  • · Replies 24 ·
Replies
24
High School What fun could you have with a fountain design in artificial gravity?
  • DaveC426913
  • · Replies 44 ·
2
Replies
44
High School Why does this not produce water pressure?
  • questions8938
  • · Replies 9 ·
Replies
9
High School Propagation of Thunder
  • Hornbein
  • · Replies 9 ·
Replies
9
Undergrad Water ripples project help please
  • help me pls 123
  • · Replies 6 ·
Replies
6
High School Uniform thermal expansion of metals
  • DaveC426913
  • · Replies 24 ·
Replies
24
High School In 2g, would jumping be harder?
  • DaveC426913
  • · Replies 8 ·
Replies
8
Undergrad First law of this universe
  • Anti10188
  • · Replies 32 ·
2
Replies
32
Undergrad How many carriers for phased array?
  • Esquilo
  • · Replies 45 ·
2
Replies
45
High School How can one relate jerk and force?
  • Dark85
  • · Replies 5 ·
Replies
5
Graduate Does a moving particle count as a wave?
  • far far away
  • · Replies 47 ·
2
Replies
47
Undergrad Understanding the Coriolis force
  • brotherbobby
  • · Replies 12 ·
Replies
12
Graduate Heat generation under shock waves
  • jnuz73hbn
  • · Replies 0 ·
Replies
0
Graduate How is literally EVERYTHING in physics not binary?
  • iWonderMan
  • · Replies 8 ·
Replies
8
Undergrad What is the proof of the Σqᵢcosθᵢ = constant theorem for colinear charges?
  • Ajinkya78910
  • · Replies 1 ·
Replies
1
Graduate Linearization of the Navier–Stokes equations for real airflow conditions
  • Pharal
  • · Replies 1 ·
Replies
1
High School Rubber band: More or less force to stretch at the beginning?
  • MilleySill
  • · Replies 8 ·
Replies
8
Undergrad Exploring the possibilities of storing electricity from lightning
  • couperusfred
  • · Replies 14 ·
Replies
14
Undergrad Different result with kinetic energy and momentum when a bullet hits a target
  • BWR
  • · Replies 29 ·
Replies
29
Undergrad Measured Spectrum of Stopped Wood Organ Pipe Shows ALL Overtones
  • greypilgrim
  • · Replies 30 ·
2
Replies
30
Undergrad Pumping liquid around and draining a part of it, how much is lost?
  • Ito
  • · Replies 3 ·
Replies
3
High School An apparent contradiction between Fleming's rules
  • brotherbobby
  • · Replies 16 ·
Replies
16
High School Is it safe to fly in a spinning hollow asteroid?
  • DaveC426913
  • · Replies 39 ·
2
Replies
39
Undergrad Velocity of a free particle using Landau's approach
  • Rick16
  • · Replies 20 ·
Replies
20
Undergrad What physics study path would help me answer my own hydraulics question?
  • pvshackguy
  • · Replies 13 ·
Replies
13
High School Bubbles in Space
  • sqljunkey
  • · Replies 2 ·
Replies
2
Undergrad Potential energy of a system of particles
  • Rick16
  • · Replies 7 ·
Replies
7
High School The world is not enough
  • red_ed
  • · Replies 37 ·
2
Replies
37
Undergrad Extreme Negative Polarization (peer reviewed Astrophysical Journal)
  • Julian_M
  • · Replies 15 ·
Replies
15
Undergrad Why is thermal energy treated differently than other kinds of energy?
  • nataliaeggers
  • · Replies 30 ·
2
Replies
30
High School Internal energy and gravitation
  • hokhani
  • · Replies 14 ·
Replies
14
Graduate How can a 1 kilometer body (3i/Atlas) flip 180 degrees suddenly?
  • Julian_M
  • · Replies 9 ·
Replies
9
Undergrad The missing 3D magnetism theory
  • nataliaeggers
  • · Replies 6 ·
Replies
6
Graduate How to compute the path 3i/Atlas will take when it passes near Jupiter?
  • Julian_M
  • · Replies 8 ·
Replies
8
Undergrad Is a half submerged object submerged in its own displaced water?
  • lost captain
  • · Replies 22 ·
Replies
22
Undergrad Problems with Blum's Karate Article
  • makamo66
  • · Replies 3 ·
Replies
3
Undergrad 20 Megapascals of negative pressure... What? Please explain
  • DaveE
  • · Replies 6 ·
Replies
6
High School How much lower would a sheep be expected to jump if on a steep upward slope?
  • questions8938
  • · Replies 33 ·
2
Replies
33
High School Fan is pushing in the front and sucking from the back
  • johnthekid
  • · Replies 32 ·
2
Replies
32
High School Automobile Does Front Flip
  • Hornbein
  • · Replies 3 ·
Replies
3
Undergrad What is the pressure of trapped air inside this tube?
  • lost captain
  • · Replies 19 ·
Replies
19
Graduate Static Electricity foam balls
  • ron351
  • · Replies 4 ·
Replies
4
High School Which technique has been used? (drowning victim recovery in a lake)
  • fresh_42
  • · Replies 20 ·
Replies
20
Undergrad What areas of maths and physics do I need to understand explosion physics?
  • Ax_xiom
  • · Replies 46 ·
2
Replies
46
Undergrad Confusion about derivation of equation in Gregory
  • terahertz
  • · Replies 5 ·
Replies
5
High School 'splain this hydrostatic paradox in tiny words
  • DaveC426913
  • · Replies 9 ·
Replies
9
Undergrad Explain Bernoulli at the molecular level?
  • user079622
  • · Replies 252 ·
9
Replies
252
Graduate Advice for 100 MHz resonator
  • BillKet
  • · Replies 11 ·
Replies
11
High School What qualities does time have other than linearity, motion, and speed?
  • atlanticus
  • · Replies 8 ·
Replies
8
High School Ultrasonic wave and regular sound wave
  • Hesh123
  • · Replies 4 ·
Replies
4
High School Use Surface-Volume to approximate gravity for planets and protons
  • Owe Kristiansen
  • · Replies 6 ·
Replies
6
Undergrad What does the Lattice Boltzmann Equation actually say?
  • Swamp Thing
  • · Replies 8 ·
Replies
8
High School Slow Motion Appearance of Flags: Fluid Dynamics or Perceptual Illusion?
  • metehansure
  • · Replies 7 ·
Replies
7
High School Symbol for temperature on the Fahrenheit scale
  • DrDu
  • · Replies 13 ·
Replies
13
Undergrad Are 1D Longitudinal Waves Reflected at an Open End?
  • greypilgrim
  • · Replies 11 ·
Replies
11
High School How Did Scientists Develop and Validate the Atomic Model?
  • Itry
  • · Replies 1 ·
Replies
1
Undergrad Focusing sound waves from the environment
  • gensahilsingh
  • · Replies 6 ·
Replies
6
High School Conservation of energy demo -- An upgrade to the standard version
  • DaveE
  • · Replies 4 ·
Replies
4
High School Why do things burn up in the atmosphere but not in the ocean?
  • Feynstein100
  • · Replies 14 ·
Replies
14
Undergrad A Mathematica code to plot two functions on the same screen
  • hagopbul
  • · Replies 5 ·
Replies
5
Undergrad Need help for ultrasonitc atomizer (transducer)
  • MRoydev
  • · Replies 2 ·
Replies
2
Undergrad Standing Waves by Reflection: Losses of the Reflected Wave
  • greypilgrim
  • · Replies 16 ·
Replies
16
Undergrad Pulse bouncing off ends of a tube, expressed as sum of sine modes?
  • Swamp Thing
  • · Replies 15 ·
Replies
15
High School Power from global loop power cable ?
  • synch
  • · Replies 1 ·
Replies
1
Undergrad Bouncing sound pulse in cylinder, driving vibrations in shell
  • Swamp Thing
  • · Replies 1 ·
Replies
1
Undergrad Help me to understand how integrating this function works
  • Kalarudra
  • · Replies 13 ·
Replies
13
Undergrad Which radiation between infrared and microwave is more penetrating?
  • Cosma
  • · Replies 11 ·
Replies
11
Undergrad Frequency components that remain fixed when singing a scale
  • Swamp Thing
  • · Replies 18 ·
Replies
18
High School What is the speed of "motion"?
  • BFEENEY
  • · Replies 14 ·
Replies
14
Undergrad Water column object insertion and energy recapture
  • HOTTUBTHOMPSON25
  • · Replies 15 ·
Replies
15
Graduate Hamiltonian formulation of classical mechanics as symplectic manifold
  • cianfa72
  • · Replies 5 ·
Replies
5
Undergrad Singing Crystal Wineglass -- Does the wine mass determine the pitch?
  • Twodogs
  • · Replies 22 ·
Replies
22
Undergrad Why is the Cross Product Used in Mathematics? Understanding its Role and History
  • Trying2Learn
  • · Replies 21 ·
Replies
21
Undergrad Wave motion and a stretched string
  • mondo
  • · Replies 3 ·
Replies
3
High School Simulate an altitude at 16000-18000 feet with water depth
  • Rev. Cheeseman
  • · Replies 29 ·
Replies
29
Undergrad Calculating Watt Hours for a time interval less than 1 second
  • pete94857
  • · Replies 5 ·
Replies
5
Undergrad How is the mass of the Earth or the Sun measured?
  • C18
  • · Replies 7 ·
Replies
7