Advanced Physics Homework Help Forum

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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.
Wave equation for Schwarzschild metric
  • Arman777
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Exercise involving Dirac fields and Fermionic commutation relations
  • snypehype46
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What is the proof for Bertrand's theorem in celestial mechanics?
  • cristianbahena
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How to calculate the outer product in GR?
  • Haorong Wu
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Stress-energy tensor for a rotating sphere
  • Haorong Wu
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Deriving equation 9.91 in Carroll's Book "Spacetime and Geometry"
  • silverwhale
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DeltaG and DeltaA calculation for heating a gas at constant volume
  • zacc
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Rewriting a given action via integration by parts
  • JD_PM
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The representation matrix for alpha and beta in Dirac equation
  • Haorong Wu
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Questions on field operator in QFT and interpretations
  • user1139
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Question on discrete commutation relation in QFT
  • user1139
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Mysteries of Geometric Optics In MTW Chapter 22
  • TerryW
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4
Riemann curvature coefficients using Cartan structure equation
  • snypehype46
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2
How to Implement Current Conservation for SU(N) in the Adjoint Representation?
  • Tian
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Writing the charge density in the form of the Dirac delta function
  • approx12
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Proving modified Maxwell action is gauge invariant
  • DaniV
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3
Why Are There Additional Eigenvalues and Eigenvectors of J3?
  • StenEdeback
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Find Ground State Energy of 3D Harmonic Oscillator
  • koustav
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4
How Can the Refractive Index Be Less Than One?
  • DannyJ108
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3
How Does Lorentz's Equation Transform into Cauchy's Law?
  • DannyJ108
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8
Calculating Radiation Pattern for a grid of two rows of dipole antennas
  • phinfinity
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5
System of two spin 1/2 particles in an external magnetic field
  • ConorDMK
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2
What are Initial Conditions and How Do You Write Them for the 2D Wave Equation?
  • RealKiller69
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Divergence in Spherical Coordinate System by Metric Tensor
  • Astrocyte
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2
Monopole and Dipole Terms of Electric potential (V) on Half Disk
  • jkthejetplane
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Solid-state Physics: Fermi surface and necks in an FCC structure
  • LuccaP4
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Probability of measuring an eigenstate of the operator L ^ 2
  • Marioweee
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10
Intermolecular forces and Transport phenomena
  • jacobtwilliams001
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Star collapse in general relativity — pressure as a function of star radius
  • Lilian Sa
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Adiabatic Approximation for Infinite Square Well
  • rmiller70015
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Feynman Diagrams, are these allowed?
  • NumberBucket
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Calculating specific heat capacity from entropy
  • approx12
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1
Finding the Ratio of Particles in a Three-Level Quantum System
  • AlexTab
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1
Show that a partial molar property is an intensive property
  • mcas
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5
Deriving Fourier Transform of Operators for Relativistic Quantum Field Theory
  • JD_PM
  • · Replies 18 ·
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18
Computing the spectrum of a Lagrangian in field theory
  • snypehype46
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2
Electrostatic Potential Energy of a Sphere/Shell of Charge
  • sophiatev
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Thin disc with high thermal conductivity
  • Rlwe
  • · Replies 29 ·
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I deriving a pupil function in a coherent imaging system
  • silentt
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2
How to calculate the four-momentum of a photon in FRW Metric
  • JohnH123
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3
Calculation Involving Projection Tensor in Minkowski Spacetime
  • crime9894
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2
Derivation of the density of states?
  • patric44
  • · Replies 6 ·
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Amplitude of Feynman diagram in ##\phi^4## interactions
  • snypehype46
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How does Generalized Work have dimensions of Work?
  • patric44
  • · Replies 5 ·
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Doubt regarding functional derivative for the Thomas Fermi kinetic energy
  • JhonDoe
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How to perform a integral in momentum space
  • LCSphysicist
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Working out Plane Structure via Powder X-ray Diffraction Multiplicand
  • PandaKitten
  • · Replies 5 ·
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5
How can Minkowski spacetime be expressed as a U(2) manifold?
  • etotheipi
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Density of states of one three-dimensional classical harmonic oscillator
  • anaisabel
  • · Replies 11 ·
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Electric potential inside a hollow sphere with non-uniform charge
  • RodolfoM
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Ballentine Problem 7.1 Orbital Angular Momentum
  • Irishdoug
  • · Replies 21 ·
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21
Weyl Spinors Transformation, QFT1, Peskin, Chapter 3
  • Pouramat
  • · Replies 12 ·
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12
Model with SU(2) gauge symmetry and SO(3) global symmetry
  • jack476
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Relating the entropy of an ideal gas with partial derivatives
  • Mayan Fung
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Clarification on electric quadrupole moment definition
  • user1139
  • · Replies 5 ·
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The contracting relations on the Christoffel symbols
  • Arman777
  • · Replies 18 ·
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18
Solving QM Problem: Fermi's Golden Rule & Transitional Probability
  • ashah99
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Finding the period of an orbit ##r=a(1+\cos\theta)##
  • Davidllerenav
  • · Replies 26 ·
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Diagonalizing a metric by a coordinate transformation
  • Lilian Sa
  • · Replies 12 ·
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A potential well with 3-fold reflection symmetry
  • lazayama
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Deriving perfect fluid energy tensor from point particles
  • mjordan2nd
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Help with evaluating this Fourier transform
  • user1139
  • · Replies 11 ·
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11
Deriving the Reissner-Nordström metric
  • etotheipi
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9
Diagonalizing a metric by a coordinate transformation
  • Lilian Sa
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Proving Poincare Algebra Using Differential Expression of Generator
  • crime9894
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Potential Inside and Outside of a Charged Spherical Shell
  • jkthejetplane
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Speed of sound in a relativistic fluid
  • etotheipi
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Delta potential problem - bound states problem
  • LagrangeEuler
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Show charge conservation in a curved spacetime
  • etotheipi
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Varying an action with respect to a scalar field
  • JD_PM
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Formula for ionization potential reduction
  • Goldhelmeth
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An accurate method to determine the band gap
  • Michell
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5
Potential solution:Uses of Transparent Semiconductors: FTO and ITO explained
  • Michell
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3
Lubrication Theory: Fluid Flow and Integration
  • E.T.A.
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Tensor Calculations given two vectors and a Minkowski metric
  • Arman777
  • · Replies 7 ·
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7
How Do You Operate the Hamiltonian on a Coherent State?
  • tanaygupta2000
  • · Replies 9 ·
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Particle falling radially into a black hole
  • Cythermax
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How Does Angular Radius Relate to Deflection Angle in Redshift Calculations?
  • stuartgriffin
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Uniform Density Stars: Struggling with Understanding
  • Cythermax
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How Can Cylindrical Coordinates Simplify Complex Number Integration?
  • tanaygupta2000
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Trying to understand electric and magnetic fields as 4-vectors
  • user1139
  • · Replies 3 ·
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3
Wald ch 4 problem 3a, derive equation (4.4.24)
  • etotheipi
  • · Replies 15 ·
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How Does the Sackur-Tetrode Equation Resolve the Gibbs Paradox?
  • Kaguro
  • · Replies 4 ·
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Derive the Maxwell "with source" equation
  • LCSphysicist
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Ibach Luth - Solid State 1.11 (QM model for Van der Waals' equation )
  • DrPhysics
  • · Replies 1 ·
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How is the Matrix in Momentum Representation Derived?
  • LCSphysicist
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Verify the average value of (1/r) for a 1s electron in the Hydrogen atom
  • agnimusayoti
  • · Replies 6 ·
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Scale factor of special conformal transformation
  • stegosaurus
  • · Replies 4 ·
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Double Delta Potential: Solving Particle Scattering Problem
  • eradan
  • · Replies 12 ·
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12
How Can the Stability of a Kapitza Pendulum Be Demonstrated?
  • HansBu
  • · Replies 5 ·
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Proton in a 1D Box: Energy, Probability, Speed
  • docnet
  • · Replies 24 ·
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Operator with 3 degenerate orthonormal eigenstates
  • Celso
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Is My Calculation of Local Energy Conservation in a Viscous Fluid Correct?
  • TerryW
  • · Replies 2 ·
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Tensor help -- Write out this tensor in a simplified sum
  • user1139
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1
Maxwell's Equations and the Variation of Metric Determinant
  • etotheipi
  • · Replies 10 ·
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10
How to Determine the Height at Which a Particle Falls Off a Hoop?
  • Arman777
  • · Replies 10 ·
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Laplace Equation Numerical Solution
  • jawad hussain
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1
How Can Lagrange Multipliers Determine Maximum Shannon Entropy?
  • Irishdoug
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Is the given wave function a stationary state?
  • Marioweee
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Current through Ballistic 2DEG Channel
  • FermiFrustration
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