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 Why does light diffraction create circular patterns?
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Undergrad Green's function boundary conditions
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Undergrad Expansion of 1/|x-x'| into Legendre Polynomials
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Undergrad How Does Torque Affect Balance on a Self-Balancing Electric Unicycle?
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High School Inertia and flying
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High School Do Objects in Free Fall Encounter Air Resistance?
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Undergrad Express drag force/acceleration/velocity as function of time
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Undergrad Deriving the relativistic rocket equation with exhaust efficiency
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Undergrad Fluid dynamics of sailing boat when steering
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Undergrad The far reaching ramifications of the work-energy theorem
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Undergrad How Does a Polygon Topple Without Sliding or External Force?
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Undergrad Lagrangian density of a linearly elastic string under gravity
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High School Slack vs tight rope at the start of a pendulum
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High School Why Do Poached Eggs Stay In The Center?
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Graduate Continuity of a quantity in a conical system to determine the velocity
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Undergrad Energy Released From Dropping Things Onto Neutron Stars
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Undergrad Where to Find In-Depth Resources on the Physics of CDs/DVDs?
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Undergrad Pushing a rod in a magnetic field
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High School Can charges move without a field? How charges redistribute without it?
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Graduate Stress tensor and pressure relationship
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High School Is the Longer Path Quicker in Physics?
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Undergrad How Does Friction Function in the Movement and Turning of a Car?
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Undergrad Static sphere with gravitating fluid
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Undergrad Sound power, amplitude, frequency, and decibels
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Undergrad Is Gravitational Red-Blue Shift Dismissed in Cosmic Observations?
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Undergrad Expanding around 0 for multipole expansion
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Undergrad Current's Effect on Electrical Arcs
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Undergrad What does "transforms covariantly" mean here?
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Undergrad Work done by a non constant force over a non constant angle
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Undergrad Deriving the Curl of the Magnetic Field, Role of the Nabla Operator
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Undergrad Hydrostatic pressure inside an inverted tube
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Undergrad For fun: How fast would an open-front CRT kill an average human? [A?]
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Undergrad The direction of three forces acting on a line has to be concurrent?
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Can a mathematician solve high school physics tasks without physics knowledge?
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High School Explanation for bright fringes in Single Slit Diffraction
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Undergrad Dispersion Relation in Different Media
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Undergrad How does the velocity of electrons depend on the voltage across a conductor?
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Undergrad What radioactive metal glows white hot all the time?
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High School Log relationship between thickness of material and sound absorbed?
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High School Help with science experiment magnets/force/acceleration/speed
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Undergrad Physical reality of nontrivial loops in SO(3)
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Undergrad Why singing a note while playing a note creates a difference frequency
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Undergrad Why Does a Glass Move Outward When Opening the Fridge Door?
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Undergrad Gauss' law, method of images, and force induced on conductor plates
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High School Conversion of Potential Energy: Sound or Heat?
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Undergrad Seemingly a contradiction of conservation of energy?
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Undergrad Rubber Trapezoid and Righting Moment
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Undergrad A question on momentum conservation of bodies in combined motion
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Undergrad How does BTU convert to heat in degrees in a greenhouse?
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Undergrad Work done along a path: how does velocity play into it?
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Undergrad Why Does the Negative Sign Appear in the Vector Potential Equation?
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High School Speed of sound in steel at different temperatures?
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High School A Magnetic Misconception on Divergence 0/Closed Field Lines?
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Undergrad Swimming in space, it is a possible propulsion?
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Graduate What is the heat capacity of water in meta-stable equilibrium?
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Undergrad Pressure delta 1.0 bar: 0.0 to 1.0 vs 1.0 to 2.0
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High School Ignoring the motion of the Earth for energy vs. momentum conservation
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High School Shock wave data from nuclear tests
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Undergrad Unbalanced wheel acting as a pendulum
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Undergrad Help with force analysis in the precession of a bicycle wheel
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High School How does a compass know that it is in a magnetic field?
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Why does a plasma ball emit light?
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Undergrad Why Substitute Force Magnitude in Spring Work Calculation?
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Undergrad Shielded magnetic loop probe / antennas
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Undergrad Understanding Ultrasound Attenuation and Reflection in Aluminum Sheets
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High School Lever balancing physics (video game design)
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High School Understanding the Relationship Between Coulomb and Ampere in Physics
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Undergrad Force applied on sphere by turbulent flow
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Undergrad In ##\nabla\cdot\vec{E}## why can ##\nabla## pass through the integral?
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Undergrad Geometry of Cherenkov radiation
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High School How Much Energy is Stored in Earth's Magnetic Field?
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High School What is the difference between standing wave and resonance?
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Undergrad What happens if you connect the ocean floor and the surface with a pipe?
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Undergrad Will putting a wood shelf on a TV stand distribute the TV's weight?
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How Can I Create a Flavored Coating for Ice Spheres in Cocktails?
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Undergrad Why don't we talk about the E & H fields instead of E & B fields?
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Undergrad Principle of relativity and Galileo's group
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Undergrad Contradiction in formula for motional EMF
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Undergrad Is nonlinear acoustics in mainstream physics?
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Undergrad Question about magnetohydrodynamics (MHD) for electricity production
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Undergrad How did Hamilton derive the characteristic function V in his essay?
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Undergrad How to improve the accuracy of Young's double slit experiment?
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Graduate Proper Multi-Axis Rotational Analysis Method
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Undergrad Uncertainties accumulate when measuring longer lengths?
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High School Question about double-slit experiment
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High School Does an apple have its own gravity?
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High School The application of Newton's laws to fluid equilibrium
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High School Conservation of Angular Momentum - Problem understanding this scenario
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Undergrad Advice regarding sled experiment
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Undergrad Where did I make a mistake in simplifications of equations of EM field?
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Undergrad Reported uncertainties for time and distance in physics experiment
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High School How to statistically calculate the final value?
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Undergrad New frequency generation in AM signal
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High School What is the pressure acting on the air?
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Undergrad Why do bullets precess in the opposite way from gyroscope diagrams?
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Undergrad Taylor expansion about lagrangian in noether
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Undergrad Are Real Numbers Essential in Scientific Measurements and Models?
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Undergrad Rocket thrust equation -- What is velocity V in mass flow rate formula?
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Undergrad G force and extreme aviation maneuvers
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High School Magnetic attraction force Question
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