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

I Is calling fictitious forces "not real" just about terminology?

Optics

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

Thermodynamics

I What thermal cycle would describe the action of a candle carousel?

Electromagnetism

A Reflections at the source point of a transmission line
B Confused about this force calulation in Resnick Halliday Krane Electrostatics
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B Why Is Universal Attraction Used If Galaxies Accelerate Apart?
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I Can Ultrasound Be Used to Penetrate Through Air and Bone?
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I Marble spiralling inside a cylinder- New video
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I Sign of the spatial part of the J.J interaction
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B Finding the spring constant of a rope
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B Which equation should be used to calculate impulse: I=F(t) or I=m1v1-m0v0?
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B Superposed loads (gunpowder and bullets) igniting simultaneously in a barrel
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B Launch of a rocket - its initial displacement and velocity
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I How fast does a blastwave travel?
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I Atmospheric Density vs Altitude in an O'Neil Cylinder
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I Prevent a robotic cleaner from climbing on a block of iron with a magnet?
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B Help Scaling Gravity Simulation
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I Understanding Ultrasound Blocking: Effects on Energy, Reflection, and Absorption
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B Elevator Question -- What does a downward acceleration mean?
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B Non-Sinusoidal Standing Waves Existence?
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I Question about an interesting experiment video (two magnetic balls in tubes)
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I An ID-card sliding on a low friction table
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I Why is estimation of ##\frac{Pv}{RT}=1+BP+CP^2+...## interesting?
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I Where are the limits being taken in these thermodynamics equations?
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I Mapertius's Principle and 2nd Newton's law
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I How to measure average thermal conductivity of a metallic material?
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I Measuring change of magnetic field strengh over distance
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I Can EM waves stimulate neurons?
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B Does the Electric Field Change When One Charge Moves Relative to Another?
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I Active transformation use-case in homogeneity
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B Extracting electrical energy from Orbital motion
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I The electric field due to a dipole
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I Physical Meaning of the Imaginary Part of a Wave Function
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I Gravity machine force calculations assistance needed
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I Why normal force is not equal to gravity?
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I Does the Skin Effect cause charge to accumulate on the surface of a conductor?
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I Interesting sound-making hydrogen-burning device
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I Fluid dynamics: drag coefficient and pressure at the stagnation point.
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I Transformations for isotropy in terms of math
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I Coordinate transformation for isotropy
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History - Evolution of ideas in the field of thermodynamics (statistics in mechanical and gas dynamics)
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I How find moment of inertia for car in turn?
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I Results of measurement using a magnetic sensor
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I About the use of nominal definitions in physics
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I How to understand experiment to measure heat capacity of solid?
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B Pumping water upwards into a large water tank
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B Can Jupiter gravitationally eject a pebble in orbit? A smaller mass?
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I Spring balance analysis from a system point of view
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I Different Equations of Motion for different frames
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B Fluid Flow Deflection Bending Ahead of Airfoil?
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I Measuring difference in Exercising in a Flat Surface vs one with Slope
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I Inertia/Non-inertial frame - isotropy
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Crosswind problem (pgs. 34-35, Thinking Physics, 3rd edition)
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A Magnetic bound state in classical mechanics
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I Physics of car understeer and oversteer
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B Where does the 1/2 in 1/2 at^2 come from?
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B Applying Bernoulli's equation to problems involving a perfect gas
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I Pressure: Sealed bottle physics
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I Do objects always rotate around center of mass?
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A Lagrangian: kinetic matrix Z_ij and mass matrix k_ij
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I Work in hydrostatic system in cylinder with piston: P_int or P_ext?
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B Can electrons pass through a positively charged disc in electrostatic induction?
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I Effects of gravity on planetary core structure
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I Systems and number of FBDs....
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B Proof of the relation between antenna aperture and gain
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B Am I attracted to a hydrogen atom 1 billion light years away?
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I Is it accurate to say work is motion against an opposing force?
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A Upper indices and lower indices in Einstein notation
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I Empirical temperature scales using different thermometers
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I Constant length metallic wire as a thermometer, using tension?
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I How Does Temperature Affect Wire Tension at Constant Length?
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B A contradiction of the equivalence principle?
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I Writing the Lagrangians for different frames depending on how "the ball is dropped"
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A Why the James Webb Space Telescope needs propellant
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I Does being surrounded by water affect collisions between 2 bodies?
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I Deriving formula for kinetic energy
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I An interesting question about another view of baisc mechanics'laws
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B Why don't two double pendulum apparatus follow the same paths? / Chaos
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I Analog TV reception in a spacecraft moving relative to the Earth
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B Estimate the difficulty of a mountain route
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I A Continuous Solution for Mass/Spring w/ Friction
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B Calculating g with a Conical Pendulum
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I Melting point of graphite and diamond?
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I What is the distinction between invariance and covariance?
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A Are there real-world applications of Hamilton's Principle in mechanics?
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I Question about driven harmonic oscillator
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B Why is potential difference the same across each branch in parallel?
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I Alternatives to the Lagrangian?
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I Doubts about isotropy of space
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I Open problems in nonlinear dynamics and Chaos
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I Gyroscopic precession of a spin-stabilized bullet
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B Question about Euler's formula
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I Working model to demonstrate Lagrange points L4 & L5 -- possible?
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I How is this the same as this? (two kinds of waves)
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I Lagrangian total time derivative for the velocity
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I Why does resistance reduce current in whole circuit?
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I Calculating Combined Loading Stress: Neutral Axis and Bending Moment at Point A
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I Does Larmor precession change the force exerted on a magnetic dipole?
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I Constraint Forces and Lagrange Multipliers
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B Busting the myth about achieving artificial gravity by rotating a body
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I Intuition Behind Intermediate Axis Theorem in an Ideal Setting
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I The physics behind mixing coloured pigments (questions inside post)
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I Question about Penning Trap
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I Landau's inertial frame logic
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