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

Undergrad Using the "triple point of water" to produce ice. How does that work?

Electromagnetism

Undergrad What determines if wave components are independent vs coherent?
Undergrad Does the aerial [antenna] not need to be positioned perpendicular?
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Undergrad What is the best way to shield / jam ultrasound?
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Undergrad Blocking microwave auditory effect / Frey effect?
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Undergrad How to Calculate force exerted on a falling body?
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High School Leg muscles’ force as a system of levers
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High School Simple yet effective way to reliably control the DC Motor speed?
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Undergrad Relationship between the Different Frequency vs Decibel Graph Peaks
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Undergrad Approach to extrapolate a "superpositioned" wave?
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High School Basic Angle Explanation for Statics
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High School Atmospheric pressure, vacuum, etc.
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Undergrad When does the instantaneous velocity exist?
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High School In uniform acceleration, mean velocity ##\bar v = \frac{v_0+v}{2}##?
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Undergrad The effect of temperature on the damping of a guitar string
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Undergrad Can free body diagrams be used if friction at pivot is not negligible?
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Undergrad Neil deGrasse Tyson on Nikola Tesla and electromagnetic energy
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Undergrad Does Coulomb’s law change at relativistic speeds?
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Graduate Helmholtz Resonator: attenuation vs. amplification
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High School Why does ##F## often appear as inverse square laws such as Newtonian gravity?
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Undergrad Which is Better for Measuring Vibrational Systems: Free or Forced Vibration?
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Undergrad Bernoulli and Momentum Disconnect?
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Undergrad Distance traveled by a ball down a ramp and on a flat path
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High School Rope wrapped around a rod - belt friction
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Graduate Lame parameter mu = shear modulus derivation (rogue factor of 2)
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Undergrad Load on leaf blower as function of outlet shape
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High School Why is there so much multplication in physics?
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High School Question about a vacuum ejector (vacuum pump using the Venturi effect)
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Undergrad Lacking intuition with partial derivatives
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High School I still don't understand the propagation of light
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Undergrad Mainstream interpretation of Newton's bucket argument?
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High School Particle creation and annihilation
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Undergrad Question about Moon's gravitational effect on tidal bulge
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High School Car Crash Physics: Deceleration Calculations
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Undergrad Centrifugal separation into hot & cold air streams?
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Undergrad Why do phase trajectories point upwards and downwards in a quadratic potential?
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High School Can a Compass Needle be Magnetized to Any Horizontal Direction?
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High School Energy needed to stop the Earth's inner core ---and its effects?
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High School What Are the Dangers of Spectral Lines from EM Sources?
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Undergrad Theoretical pressure decay of a pressurised vessel
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High School Knudsen Flow: High School Student Q&A
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Undergrad Work done "against centrifugal force"
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Undergrad What Does Falsifiability Mean in the Context of Science?
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Undergrad Light in an accelerated elevator
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Undergrad I made an N-body simulation program
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High School How to calculate measurement error by using other quantities?
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Light's properties (Why isn't the sky violet?)
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Undergrad What is the most efficient way to cool air using a Vortex Tube (Ranque-Hilsch)?
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High School F=ma Applied to a Billiards Cue
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High School Greater momentum on impact means greater force?
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Graduate Hydrodynamic stability- Rayleigh equation - Couette flow
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Graduate How to define ##\nabla \cdot D ## at the interface between dielectrics
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Undergrad Momentum and Action: Understanding Lagrangian Mechanics
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Undergrad The Effect of Wind on the Rate an Outside Spigot Freezes
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Does the gravitational rate of acceleration increase within a planet?
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Undergrad Heating a tungsten filament to find out the maximum brightness emitted
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Graduate Is Orbital Velocity the Same as RMS of Eddy Velocities in Turbulent Flow?
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High School Minimum Velocity Required for Loop-The-Loop Problem
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Undergrad Difference between δ and ∆ variation?
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High School Football padding against forces -- What is the appropriate amount?
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High School Lagrangrian and Hamiltonian mechanics: A historical picture
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High School Can we say that a charged balloon has a center of charge?
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Undergrad Vector Potential Multipole Expansion
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Graduate How Does Anisotropy Affect the Calculation of Taylor Microscale in Turbulence?
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Undergrad Removing a proton with a particle accelerator
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Undergrad IR Laser makes glowing spot on radiometer vane
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Undergrad Is There a Better Model for the Relationship Between Friction and Velocity?
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Equations of State in Modern Classical Physics (Thorne/Blandford)
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Undergrad X*t, what is position multiplied by time?
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High School Shape & Dimensions of Containers: Impact on the Maxwell Boltzmann Distribution
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High School How to describe complicated dimensions?
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Undergrad What is the significance of the T - V Lagrangian of a system?
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High School Very basic acceleration problem (from a video on The Physics Classroom website)
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Graduate Is there a stagnation point in turbulent flows not involving solids?
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Undergrad Intuitive approach to Huygens' principle
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Undergrad Analyzing Infinitesimal Motion
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High School What's "Coulomb's law but ##F## converges as ##r\rightarrow##0" called?
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High School Units in exponentials and logarithms
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Undergrad Equation for power required to overcome drag
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High School I don't understand exactly how the propagation of light works
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Undergrad How is the damping of sound (over distance) affected by air properties?
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High School Mathematics involving a gravitational force
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High School Can a rocket flame be controlled by a magnetic field?
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High School Voltage gradient distortion in Copper when part is over a magnet
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Undergrad Can we solve this Morin's problem without conservation of string?
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High School Question about a physical entity (dimensional analysis)
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High School Verifying AI Chatbot's Answer on Brachistochrone Curve Formula
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Insights Subtleties Overlooked in Friction Questions: Object Slides Down Ramp
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Undergrad Force required to pull a cruise liner or cargo ship
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Undergrad Temperature change due to mixing liquids, heating and heat losses
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Graduate Solving this non-holonomic system using Dirac-Bergmann theory
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Undergrad Why is resistivity inversely proportional to resistance for NTC semiconductors?
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Undergrad Is the Coriolis Force a Real Phenomenon or Just an Illusion?
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High School Time for which a vertical projectile stays motionless in midair
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Undergrad Predicting the spring constant theoretically
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Undergrad Method for experimental results analysis
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High School Can we use molecular speed of gas formula also for the air?
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Undergrad How do I check if the canonical angular momentum is conserved?
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Undergrad How Does Air Resistance Relate to Hooke's Law?
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Undergrad SO(3) -- What is the advantage of knowing something is in a group?
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Undergrad Bicycle front tire wobble due to weight on the back of the bike
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High School If I double sound on my PC, how would the sound intensity increase?
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