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Free advanced physics homework help via qualified mentors. Upper undergraduate and graduate level. Please use the template when requesting help and show your work.
Why Is the Potential Zero on the Surface of a Conducting Sphere in an E-Field?
  • sachi
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X-Ray Diffraction: Understanding Reflection Symmetry
  • alona
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What Is a Four Potential That Yields a Photon?
  • EroticNirvana
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DeBroglie wavelength considering relativistic effects
  • *Alice*
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Is Surface Density of Starlight Synonymous with Surface Brightness?
  • Zaphodx57x
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2006 A2 Practical Planning Exercise
  • the_fugitive
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Converting Atomic Units: Where Did I Go Wrong?
  • Pengwuino
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Radiation Reaction Force (or Self Force of charge particle)
  • martinan
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Where Can I Find Free Downloadable Books on Particle Physics?
  • phisomiso
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What is the Efflux Velocity from a Tank with Water and Oil Layers?
  • Amith2006
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Which notation for pion(0) makeup is correct?
  • maverick6664
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How Do Eigenfunctions Behave in a Triple Delta Potential Well System?
  • prairiedogj
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Why Does Energy Decrease When Work Is Done?
  • sachi
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A spinning ball hits a wall and bounces back question
  • greytomato
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What Happens When You Connect Two Objects by a Wire?
  • sachi
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Schaum's Outline for Engineering & Science errors
  • johngatlin
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Model a Triple Pendulum: Step-by-Step Guide
  • leon1127
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Does the n=0 State in a Quantum Box Violate the Uncertainty Principle?
  • pivoxa15
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Why is it that some transformers emit a hummin sound
  • LightMage
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Soap Bubble Coalescence: Shape and Volume Change
  • Amith2006
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Analytical mechanics: 2D isotropic harmonic oscillator
  • swindhspectrum
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Calculating Partial Transition Rates W from Branching Ratios
  • marlon1
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Electric field of a semi-circular rod
  • twiztidmxcn
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How to Derive Initial Velocity in Projectile Motion Using Lab Measurements?
  • J_o_S
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Explaining Gravity Through Exchange Interactions
  • pony slaystation
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How to Find the Coordinate Transformation that Diagonalizes a Quadratic Form?
  • QuantumDefect
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What Is the Potential Energy of a Charge Near an Infinite Sheet and a Long Wire?
  • wml
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How do I find P as a function of r for a Vanderwaals gas?
  • haras
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Why Is Longitudinal Lattice Ignored When Proving Debye Frequency in Crystals?
  • asdf1
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QM Problems with wavefunction given in sin and cos.
  • darkar
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Why Does Soap Bubble Expand When Charged? | Properties of Matter
  • Amith2006
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Can a system have a negative temperature based on its energy and entropy?
  • ak416
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Problem with making a wavefunction for two particles
  • mathlete
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Refraction of Light in a laser beam
  • sci0x
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How to show something is a covector?
  • Baggio
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Friedmann Equation and the age of empty universe
  • darkar
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Solving Properties of Matter Problem: Steel Ring Expansion Force
  • Amith2006
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Schrodingers equation probability currents
  • golfingboy
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Why does Wien's displacement law not hold for frequency?
  • Jezuz
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Liquid condensing out in thermodynamics
  • sachi
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Electrostatics Problem (Calculating Electric Field)
  • clear_out
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Integration of V(t) using faraday's law
  • ilovephysics
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The Hamiltonian: Solving dH/dt Formally
  • stunner5000pt
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Does the Average Speed Formula Work for Rolling Objects?
  • alex_boothby
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Where Should Particle 3 Be Placed to Nullify Electrostatic Forces?
  • datenshinoai
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Does Special Relativity Affect Light Travel Time Between Moving Points?
  • physicsss
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Electrostatics - charges in stable equilibrium
  • gandharva_23
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Age of Universe Explained & Proven w/ Hubble's Law
  • Hana88
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What is the Physical Significance of Curl in Gauss Law?
  • gandharva_23
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Underdamped oscillation
  • esradw
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Hamiltonian and Conjugate Momenta in a Two-Dimensional Potential
  • stunner5000pt
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How Are Electrostatic Boundary Conditions Derived?
  • ak416
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Fluid Mechanics - Highest Possible Water Can go in a Straw
  • nymetfan21
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Weak field general relativity
  • Pietjuh
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Simple pendulum, and inertial and gravitational mass
  • Amith2006
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Solving Lagrangian Mechanics: Hamilton's Eqns & EL Eqns
  • stunner5000pt
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Is the Bumper Car Grid a Series or Parallel Circuit?
  • M&M
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What is the Probability of Finding a Particle in an Infinite Square Well at x=L?
  • UrbanXrisis
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Calculating Quantum Number n for a Mass Moving in an Infinite Square Well
  • UrbanXrisis
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Eigenfunction of the momentum "operator"
  • UrbanXrisis
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Where Is Earth's Nutation and Does the 23.5° Axial Tilt Ever Change?
  • Ahmes
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How to Estimate Dipole Moments in Xenon at S.T.P.?
  • comwiz72
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Boundary Conditions for Waves in Joined Strings with a Knot of Mass
  • mathlete
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Spontaneous symmetry breaking in the SM
  • AlphaNumeric
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Resistance between coaxial cylinders
  • Reshma
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How Does Temperature Affect Density and Pressure in Thermodynamics?
  • Ne0
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Sellmeier's equation to cauchy's equation
  • ehreming
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How Does Radiation Intensity from a Star Change with Distance?
  • stunner5000pt
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Earth Subtended Solid Angle from 2000 km Satellite
  • stunner5000pt
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Verifying Solutions of de Broglie Form of Schr. Eqn
  • UrbanXrisis
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Zero Curl Vector Fields - Does it Mean Potential Energy?
  • jackiefrost
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A KE derivation from Compton Effect
  • Pengwuino
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What is the expression for the spectrum of a hot gas with Doppler broadening?
  • broegger
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Magnetic Flux Q: How Is Flux Independent of Surface?
  • Reshma
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Why Does the H_{\alpha} Line of the Balmer Series Split?
  • Reshma
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Calculating Escape Speed, Lagrange Points, & Stress/Strain of Rope
  • Meistro
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Age of the earth - uranium radioactive decay
  • A_I_
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Troubleshooting Resistors in Series/Parallel Circuits
  • donjt81
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Estimating Radii of Carbon & Oxygen Nuclei with Data
  • mmh37
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Find the Induced EMF in a Rotating Spherical Shell in a Magnetic Field
  • Reshma
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Kepler's Laws - implications of changed theory
  • Bonulo
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Quantum Computation and Quantum Information
  • G.F.Again
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Calculating Energy Stored in a Toroidal Coil
  • Reshma
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Which Formula Determines Pendulum's Period in Accelerating Frame?
  • gandharva_23
  • · Replies 12 ·
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Electric field and equipotential lines
  • twiztidmxcn
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Charged particle near a grounded plane
  • Reshma
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Particle in a Box: Wave Function A_1 Value Confusion
  • ek
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Why do light bulbs burn out when turned on, but not while shining?
  • 9danny
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How Do Oppositional Currents Affect Magnetic Fields at a Point?
  • wr1015
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Energy question on Weather/Atmospheric
  • button2
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Understanding Lorentz Force: Accelerating a Wire
  • Seatl
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Which Online Star Catalogue Provides Distances and Masses of Stars?
  • dekoi
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Infinitisemal magnetic flux density
  • Vegeta
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Will the barometer reading rise or fall ?
  • gandharva_23
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Is Angular Momentum Constant in the Body Frame of a Rigid Body?
  • Ahmes
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Solve Equation of Motion: Particle in Field
  • stunner5000pt
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Lagrange Multipliers: A Long First Post
  • stunner5000pt
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Find Generalized Euler Equation for Function y(x)
  • stunner5000pt
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How Do You Find the Temperature Coefficient of Resistivity at 0 Degrees Celsius?
  • skiboka33
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Can the Doppler Formula be Used for an Accelerated Sound Source?
  • gandharva_23
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