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.
Some questions about reciprocal lattice vectors
  • patric44
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Do i need to calculate the expectation value of the Hamiltonian?
  • Zero1010
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Finding meaning in the Phase of the wavefunction
  • Irishdoug
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Partition function of 2 bosons in two energy level 0 and E
  • Apashanka
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SR w/ Acceleration: Distance Measured by A
  • Gaussian97
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Nuclear Reactor Analysis Problem 5.34
  • Tanman77
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The Variation of Christoffel Symbol
  • rezkyputra
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Troubleshooting the Partition Function for a System with 3 Spins
  • annaphys
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Mechanics problem in a non-inertial system
  • RoloJosh16
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Find the Lagrangian of this single mass system
  • MyoPhilosopher
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Find a transformation that leaves the given Lagrangian invariant
  • JD_PM
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Calculating the Number of States: Ω = V^N * E^0.5N
  • pallab
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Trouble with Electric Potential Boundaries (Computational Physics)
  • CrosisBH
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Potential Energy vs x phase diagram
  • Blakely42
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Negative or Positive Partial Derivative
  • Saptarshi Sarkar
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Taylor expansion of an Ising-like Hamiltonian
  • Silicon-Based
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QHO: Time dependant expectation value of the potential energy
  • phb1762
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Antisymmetry of the electromagnetic field tensor
  • shinobi20
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7
Wave behavior across two semi-infinite membranes with a special boundary
  • Miles123K
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Invariance of ##\epsilon^{\mu \nu \alpha \beta}##
  • dRic2
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Finding t and x in terms of proper time?
  • Physicsphysics
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1
Isospin Conservation: Calculating I3 and I
  • tm33333
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3
What are the coordinates of the upper cylinder? (and some algebra)
  • JD_PM
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12
Why is the Answer C? Electric Field in Conductors
  • SmartAries
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4
Dipole and Quadrupole moments and axial symmetry
  • lapantufla
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2
Numerically simulating stellar pulsation using a "one zone" model
  • patrykh18
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Gaussian wavepacket as a solution of the Schrödinger equation
  • JorgeM
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Uncertainty in wavelength and position
  • Saptarshi Sarkar
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Get all possible constants of motion given an explicit Hamiltonian
  • JD_PM
  • · Replies 56 ·
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Determining Photon Paths in a Double Slit System
  • kof9595995
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Contracting one index of a metric with the inverse metric
  • shinobi20
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Ground state energy of 5 electrons in infinite well
  • Saptarshi Sarkar
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Beam Splitter Inputs and Commutting Modes
  • BeyondBelief96
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Change in Entropy for an isolated system
  • Pouyan
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Using Noether's theorem to get a constant of motion
  • JD_PM
  • · Replies 81 ·
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A question about the derivation of Fermion Quantization in QFT
  • Andrew3
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Density operator and natural log/trace
  • t0pquark
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15
Vortex Nucleation Critical velocity using the Uncertainty Principle
  • Ted55
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How is entropy affected in a reversible process for an ideal gas?
  • Pouyan
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Five State Quantum System, understanding the question
  • Cetus
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7
QFT Commutator for spacelike separation
  • PeroK
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2
Understanding inner product space and matrix representations of Operat
  • cookiemnstr510510
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Probability of finding a particle in a region
  • Saptarshi Sarkar
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Linear operators, quantum mechanics
  • cookiemnstr510510
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12
Find the time-dependent wave function Ψ(x, t).
  • gabriellelee
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Traveling quantum Gaussian wave packet
  • boudreaux
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Harmonic Oscillator Ladder Operators - What is (ahat_+)^+?
  • gabriellelee
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What is the Relationship Between Probability Amplitudes and the Sum of Terms?
  • isochore
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Momentum conservation for a free-falling body in GR
  • complexconjugate
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[Computational Physics] Modeling the path of a Baseball with drag
  • CrosisBH
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Solving a Complex Problem: Z_N, p(r), and Averages
  • Jacques_Leen
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Canonical ensemble and Force on the Walls of a box
  • Jacques_Leen
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How Does the Ising Model Apply to Lattice Gas Systems?
  • Jacques_Leen
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Show that the metric tensor is independent of coordinate choice
  • PrecPoint
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Lagrangian equations with other kinds of constraints
  • DEvens
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Writing a squared observable in Dirac notation
  • Zero1010
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What is the complex conjugate of this wave function?
  • gabriellelee
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How to Calculate Relativistic Momentum Using M, m, and c?
  • Saptarshi Sarkar
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Variations of a parameter in a differential equation
  • themagiciant95
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Calculating Energy-Momentum Tensor in GR
  • Markus Kahn
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Transformation from de Sitter to flat spacetime coordinates
  • Markus Kahn
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Spectral density of radiative electric field
  • Decimal
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Equation of Motion of a Particle acted on by a retarding force
  • physconomics
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Derivation of the Equations of Motion for a System
  • Master1022
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Feynman problem 39-2: Calculations for an adiabatic process
  • aa_o
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Deriving ground state electron energy using Boundary Value
  • currently
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Magnetic vector potential of a moving current sheet
  • Decimal
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Hamilton's equation and Euler-Lagrange's equation comparison
  • JD_PM
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Integral of relative distance–dependent potential
  • Isotropicaf
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Electron and positron collision producing a b0 meson pair
  • physconomics
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Quantum Mechanics Infinite Potential Well -- Check Answers please
  • Irishdoug
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Particle decaying into two daughter particles - special relativity
  • physconomics
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Partial Derivative of a formula based on the height of a cylinder
  • currently
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Schrodinger's Equation in terms of vacuum permittivity?
  • currently
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A moving pi-meson decaying into 2 photons - finding their energy
  • physconomics
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Where Is the Error in My PV Modeling Code?
  • nughii
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Why can we always choose energy eigenstates to be purely real function
  • Irishdoug
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Group Action of C3v on 2x2 Complex Matrices
  • filip97
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Minimum wavelength of phonons under the Debye aproximation
  • AngelFis93
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Central force on a particle following a logarithmic spiral
  • JD_PM
  • · Replies 25 ·
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What Do I Calculate the Probability Of?
  • Saptarshi Sarkar
  • · Replies 6 ·
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Man rotating in a merry-go-round and grabbing a pendulum
  • JD_PM
  • · Replies 12 ·
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Is There a Relationship Between Dipole and Wire Interaction Energy?
  • Diracobama2181
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Proof of second-order phase transition for a Van Der Waals Gas
  • CGandC
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Show that the line state is separable
  • maxi123
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Magnetic field of a rotating cylinder with permanent polarization
  • astrocytosis
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Commutation Problem: Eigenvectors, Basis & Hamiltonian
  • Diracobama2181
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Potential and E field for a non homogeneous charge Density
  • Diracobama2181
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How to show that ##f_i(q_i, p_i)## is constant
  • JD_PM
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Searching for Raman Prism: Is It Real?
  • Nirmal Padwal
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Problem 7.7 and its solution from A Quantum Approach to Condensed Matter
  • MathematicalPhysicist
  • · Replies 3 ·
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What Did I Do Wrong in My Quantum States Calculation?
  • Saptarshi Sarkar
  • · Replies 12 ·
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Deriving commutator of operators in Lorentz algebra
  • YSM
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A problem in solving Schrodinger equation for hydrogen
  • patric44
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Man walking on a rotating merry-go-round
  • JD_PM
  • · Replies 16 ·
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Primary calculation involving the Dirac gama matrices
  • YSM
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Deriving the wave equation using small perturbations
  • JD_PM
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Second-order correction to energy in degenerate purturbation
  • Haorong Wu
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Ideal gas in a cylindrical container
  • CptXray
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Magnetic flux density of a relativistic electron
  • The forgetful one
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