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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.
Number of Angular Momentum States (3 particles)
  • schlegelii
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2
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Deriving the gravitational binding energy of the cluster
  • Arman777
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6
What is the effect on the Berry phase?
  • jeon3133
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3
Spin Orbit Coupling + Magnetic Field
  • t0pquark
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5
Magnetic field intensity, flux density and magnetization of coax cable
  • AndrewC
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1
Deriving the Equation of Motion out of the Action
  • JD_PM
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15
Help Understanding Response Function $$H(\omega)$$
  • Diracobama2181
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1
Stress tensor for a parallel plate capacitor
  • patrykh18
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14
Calculating the mass of the neutrino for a relativistic case
  • Arman777
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8
Degeneracy of hydrogen energy levels
  • Silicon-Based
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Finding the velocity of an emitted particle from a decay
  • HarryO
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3
Necessary KE of particles to create a resulting particle in a collision
  • HarryO
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2
Find the probability of a particle in the left half of an Infinite Square well
  • Moolisa
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3
How to Calculate Invariant Mass for Negligible Particle Mass?
  • tnibbz
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9
What is the value of the second term in the commutator for an N particle system?
  • B4cklfip
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3
Change in Mass of Hurricane Harvey's Rain
  • Game Maker
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9
Gamma Function Q from Mary Boas 2nd ed (ch11)
  • weak_phys
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3
Scattering amplitude in scattering from a delta function
  • joaosantossilva
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1
How to Derive the Density Difference in Van Der Waals Phase Transition?
  • Diracobama2181
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6
Characteristic Impedance of a coaxial cable
  • EEuser
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1
Do Lx and Ly have a same eigenstate?
  • Haorong Wu
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5
General solution of the spherical wave equation
  • ContagiousKnowledge
  • · Replies 20 ·
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20
Relationship between Heat Capacity Cv for Different Models
  • A Story of a Student
  • · Replies 14 ·
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14
Invariance of a spin singlet under rotation
  • Silicon-Based
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6
Does $$S_1^x$$ commute with $$S^2$$?
  • Diracobama2181
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Normal modes of a rectangular elastic membrane
  • ContagiousKnowledge
  • · Replies 9 ·
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9
Find the electric dipole moment for a water molecule
  • Elder1994
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1
How Can We Generalize the Lorentz Transformation to Two Dimensions?
  • unified
  • · Replies 9 ·
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9
Show that the Hamiltonian is Hermitian for a particle in 1D
  • Moolisa
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4
Quantum tunneling: T(E) graph for a potential barrier diagram
  • Theodore0101
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3
Vector potential of current flowing to a point from all directions
  • RedDeer44
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3
Is the Integral ∫x|∅(x)|²(1+|x|)ⁿdx Finite in Quantum Mechanics?
  • TTT
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9
Show that the position operator does not preserve H
  • Moolisa
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6
Finding Cartan Subalgebras for Matrix Algebras
  • leo.
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1
Why Does My Calculation Have an Extra Factor of 2?
  • RealKiller69
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2
Energy of singlet state and triplet state
  • insanul
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1
Find psi(x,t) when psi(x,0)= Ae^(-x^2/a^2) and A, a are real constants
  • Moolisa
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2
Is the Ion Bound with this Energy Minimization?
  • schlegelii
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1
Operator that commutes with the Hamiltonian
  • Riemann9471
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3
Electromagnetic waves incident on an anti-reflective coating
  • ContagiousKnowledge
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3
How Do I Solve These Scattering Cross Section Problems?
  • Diracobama2181
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5
(Physicist version of) Taylor expansions
  • Jason Bennett
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2
Electromagnetic plane waves from a current sheet
  • Luqman Saleem
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1
Why doesn't a real Infinite Redshift Limit occur at R+ for Kerr BHs?
  • JTorn
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Find the potential V(r, φ) inside and outside the cylinder
  • nickap34
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5
How Does Eddington Luminosity Limit Black Hole Mass Accretion Rates?
  • fishlens
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1
Dyson's series and the time derivative
  • Markus Kahn
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1
Virial Expansion Approximation of of Lennard Jones Potential
  • Diracobama2181
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1
Term Symbol of Carbon & Configuration Explanation
  • insanul
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1
Expectation value of an angular momentum with a complex exponent
  • isochore
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3
I with an exercise about Energy and Schwarzschild Black Holes
  • JTorn
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8
How to Determine the Noether Current for a Given Symmetry and Lagrangian?
  • Markus Kahn
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5
Combine 3 Eqns for Plasma in a Solenoid
  • ccab521
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Canonical transformation in classical mechanics
  • dRic2
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5
Finding the equation of motion for Born-Infeld lagrangian
  • vahdaneh
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1
Rotational invariance in d=2+1 dimensions (Cherns-Simons term)
  • binbagsss
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What is the Correct Way to Plot a 2D Ising Model Temperature Chart?
  • tisseq
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2
Why is eta meson decay into 3 neutral pions forbidden?
  • lLehner95
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What Happens When the Ladder Operator Hits the Identity Operator?
  • binbagsss
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4
How to Apply Fourier Transform to Green's Functions?
  • lulia
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WKB method transmission coefficient
  • B4cklfip
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12
Why is the Lie Bracket the same as the Cross Product for a 2 Sphere in R3?
  • nigelscott
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5
Dummy index and renaming if not a tensor
  • binbagsss
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8
Show that the given Green Function is the propagator of a certain Lagrangian
  • Markus Kahn
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1
Feynman one-loop integral ##I_{21}##
  • RicardoMP
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1
Find the eigenvector with zero eigenvalues at any time t from the Hamiltonian
  • Jack_11
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1
Probability of Measuring ##L_x = 0## for a Given ##\psi##
  • t0pquark
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4
Is My Solution to the Momentum Conservation Equations Correct?
  • Sabra_a
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5
Find the photon energy in the center of mass frame and vice versa
  • lLehner95
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8
Vector calculus identity and electric/magnetic polarization
  • dRic2
  • · Replies 27 ·
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27
Expressing this vector integral as a tensor involving the quadrupole
  • PhDeezNutz
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2
Yukawa Potential: Find Value of Parameter 'a
  • MaestroBach
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Density Matrix of Unpolarized Light
  • annaphys
  • · Replies 1 ·
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1
Heat Capacity of a Fermi Gas at Low Temperature
  • Diracobama2181
  • · Replies 4 ·
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4
Repost/Merged Threads - Density: pressure and temperature dependency
  • Tales Ferraz
  • · Replies 8 ·
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8
Lorentz transformation of 4-acceleration
  • azazello
  • · Replies 7 ·
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7
Analytic solution of the Earth's orbit around the Sun
  • Nasa123123
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1
Covariant derivative of a (co)vector field
  • Markus Kahn
  • · Replies 9 ·
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9
Measuring the Transverse Velocity of a Galaxy
  • fishlens
  • · Replies 3 ·
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3
Understand the Outer Product of two qubits
  • safes007
  • · Replies 1 ·
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1
How to form the stress tensor component from the equilibrium equation?
  • lachgar
  • · Replies 9 ·
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9
Is Your Induction Solution for Rotating Spheres Valid?
  • Nirmal Padwal
  • · Replies 3 ·
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3
Question in Bose-Einstein statistics
  • patric44
  • · Replies 1 ·
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1
What is the chemical potential of a diatomic gas in equilibrium?
  • Diracobama2181
  • · Replies 7 ·
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7
How to determine whether a state is a ground state
  • Haorong Wu
  • · Replies 10 ·
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10
Simple Harmonic Oscillator Squeezing
  • t0pquark
  • · Replies 1 ·
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Finding the position of an image charge
  • Arman777
  • · Replies 2 ·
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2
Time Dependent Perturbation Problem
  • Diracobama2181
  • · Replies 7 ·
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7
Infinite square well, dimensionless Hamiltonian..
  • Cocoleia
  • · Replies 2 ·
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2
Time Derivatives of Expectation Value of X^2 in a Harmonic Oscillator
  • isochore
  • · Replies 2 ·
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2
Applying Selection Rules to Determine Non-Zero Ground State Perturbations
  • Diracobama2181
  • · Replies 4 ·
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4
Hecht optics: Request for screenshot of this figure please
  • e101101
  • · Replies 5 ·
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5
Selection Rules (Time Dependent Perturbation Theory)
  • Diracobama2181
  • · Replies 1 ·
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1
The sphere in general relativity
  • Markus Kahn
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3
Periodic images of dipole line charge followed by a vacuum space
  • SK2
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1
Does the Rigid Rotator in an Electric Field Obey Parity Selection Rules?
  • Diracobama2181
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Should spacial functions be involved when calculating <Sx>?
  • Haorong Wu
  • · Replies 7 ·
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7
Calculating Gravitational Forces and Potential Energy Using Newton's Laws
  • Nirmal Padwal
  • · Replies 6 ·
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6
Find the Total Energy of the String
  • Aerimiel
  • · Replies 1 ·
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1
How Does Jacobi's Principle Modify Lagrange's Method?
  • dRic2
  • · Replies 13 ·
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13