Classical Physics Forum

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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.

Mechanics

High School Mousetrap Car Energy efficiency

Optics

Undergrad How do I stretch a laser from a beam into a sheet?

Thermodynamics

High School Using battery energy to heat a battery…

Electromagnetism

Undergrad What determines if wave components are independent vs coherent?
High School Rotational Kinematics -- questions about a=mg sin(theta) / (m+I/R^2)
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Undergrad Question about Capacitor current and electromagnetic induction
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Undergrad How to find the change in volume of a solid to a liquid
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Undergrad Why is the Cross Product Used in Mathematics? Understanding its Role and History
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Undergrad Wave motion and a stretched string
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High School Formula for time in terms of acceleration and distance
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High School Newton's First Law -- Mistranslated for 3 centuries
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Graduate Penetration Depth of General Complex Conductivity
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Graduate Non commutator of symmetries giving rise to a gauge symmetry
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High School Simulate an altitude at 16000-18000 feet with water depth
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Undergrad Influence of electron's kinetic energy disspation during photoelectric emission
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Undergrad Origin of coordinates in multipole expansion
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Graduate Order of Galilean Boost / Translation on a wave-function (or fields)
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Undergrad Field Strength of Permanent Magnets -- Inverse square or inverse cube?
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Undergrad Calculating Watt Hours for a time interval less than 1 second
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Undergrad How to calculate the kinetic energy of an object propelled by a magnet?
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Undergrad The difference between calculating energy from 1 vs. 2 magnets?
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Undergrad Filling a pool with the hose end above or in the water
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Undergrad Variation of the Strength of a Magnetic field?
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High School Friction forces on the tires of a moving car
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Graduate Inconsistency between definitions of power and work in continuum mechanics?
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Undergrad Power done by work on a continuous body isn't the derivative of work?
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Undergrad How is the mass of the Earth or the Sun measured?
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High School 4 pounds over the weight limit of a tv stand
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High School Why Does the Speed of Light Max Out at 186,282 Miles Per Second?
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High School Electric cars: Could the rotation of tires be used to generate electricity and lengthen range?
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Question About Ideal Gas and Average Free Movement of Molecules
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Undergrad Noether's Theorem for Translation in Field Theory
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High School Is this equation at all sensical?
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Undergrad What are the stable orientations for a dipole in an external e-field
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Graduate Various questions on Galilean group (boosts and spatial translations)
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Undergrad Some questions regarding Acoustic wave reflection
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Undergrad How does pi in physics relate to circular motion and waves?
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Undergrad Mathematical disagreement with inverse square law?
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High School What happens to the energy in destructive interference?
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How to interpret the difference in height between two people in this Ames room?
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Momentum question: Object dropped onto a moving railcar
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High School Tangential Velocity (maybe)
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High School Can Ionic Compounds conduct electricity in a gaseous state?
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Undergrad What happens to X-rays if they do not meet Bragg's law?
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High School The power output of a vehicle when descending hills
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Undergrad How do I calculate brake force for an eddy current brake?
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High School Why does my LC circuit not oscillate its energy between Electric & Magnetic fields?
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High School Newton's Third Law Question -- Does the Earth Do Work on Me?
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High School Confusion about Wave Motion
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Undergrad Regarding noise propagation
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Undergrad Gravity at Earth's poles vs equator
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Graduate How to intuitively think of translations and Galilean boosts commuting?
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Undergrad 2D Ising Model Average Number of Domain Walls
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Undergrad Does a component of a vector have components?
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Graduate Mass measurement in a Penning trap
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Undergrad What is the magnetic equivalent to the Coulomb?
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Sealing vacuum chamber holes air tight
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Undergrad Physical Significance of EM Plane Waves?
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High School Stopping power of rifle slugs
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Graduate Euler Lagrange Equations for simple multi-body systems
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Undergrad [Q] Lorentz force in momentum conservation view
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Graduate Is a diffuse scatterer necessarily a Lambertian emitter?
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Undergrad Classical Field Theory - Something isn't clicking
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High School Questions about Noether's theorem -- Conservation of Energy and Mass
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Undergrad Why is saxophone growling produced by modulation of the sound waves?
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High School Does the shape of an object affect the pressure?
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Undergrad Some notes on stochastic physics
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High School My head spins when I think about time
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High School How to Fulcrum weigh camper trailer on bathroom scales?
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High School Compressive force of a shorter cylindrical bone vs a longer one
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High School Curious about the uniform electric field between metal plates
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High School Rubber Bands & Paper Attraction
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Undergrad Solve equation from dimensional analysis: 3 eq., 6 unknowns
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High School Trying to understand hydrostatic pressure
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Undergrad Does Current Density Decay to Zero at Vortex Centers in 2D Systems?
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High School Why doesn't a charged particle moving at a constant speed radiate?
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High School Trying to understand hydrostatic pressure with different vessel widths
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Undergrad Modeling a ferromagnetic core moving inside a solenoid with scipy+FEMM
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Graduate Electric and magnetic field lines in a plane wave of finite extent
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Undergrad Not a physics major -- Question about how far we can kick an object
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Undergrad How will the final output here behave?
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High School If the source of the pressure distribution around a lifting airfoil is known, why is not explained in textbooks?
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Graduate Electron drift velocity in a gas discharge
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Undergrad Noether's theorem for point particles
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High School Vacuum surface area balance and force
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Undergrad Does a time varying magnetic field in vacuum produce electric field or not?
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Undergrad How Could Rarefied Space Matter Affect a Starship's Speed Near a Star?
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Undergrad Do electromagnetic waves fade with distance in vacuum?
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Graduate Energy transfer with current in a dielectric
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High School Fully submerged block in a pool of water
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High School I have a doubt about the pressures at the same level of fluids
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High School Can sound travel through clay?
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High School Torsion Involving an Off Axis Thrust
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Undergrad How to calculate the "weight" of this piece of metal?
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Undergrad Gas Pressures and the Resistance of Materials (Biodigester Generates Methane)
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Undergrad What's the interpretation of the third term F(t)q?
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Undergrad I'm calculating more energy out than I put in
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Graduate Thermal stresses in the stress tensor
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High School The inverse-square law: Gravitational force on two falling marbles
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Graduate What Is the Expression for Settling Velocity in a Rotating Field?
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High School Speed vs. time for our Galaxy and an Observer
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Undergrad Rotating plate thrown parallel to ground
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High School Magnet inside a solenoid with current
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Undergrad Light / lumens question about photography exposure times
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