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.
Matrix and cross section of the Xf -> Xf process
  • Homer_J
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Force density from an electromagnetic field
  • dykuma
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13
Phase space of a harmonic oscillator and a pendulum
  • DannyJ108
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5
Prove the well-established (in GR) stress-energy tensor formula
  • JD_PM
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4
Does operator L^2 commute with spherical harmonics?
  • Feelingfine
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2
Quantum motion of a charged particle in a magnetic field
  • EightBells
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3
I need a help on thermodynamics physics relating to Metallic Hydrogen
  • Haozi02133
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1
Quantum Mechanics Hydrogen Atom Expectation Value Problem
  • cemtu
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24
Not sure where this final Hamiltonian came from
  • SamRoss
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3
Study the action in a one-dimensional movement (Hamilton Principle)
  • alex23
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2
A Simple angular momentum analysis question (check my solution please)
  • Wan Anavan
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6
Analytic solution of the SHO for 1D Schrodinger
  • weak_phys
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6
Quantum Mechanics hydrogen atom eigenfunction problem
  • cemtu
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1
Solution of the f_1(x)-f_1(x-pi)=f_2(x) functional equation
  • Domdamo
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3
Optical depth using Bremsstahlung emission coefficient
  • Kayla Martin
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3
Help please differentiating this equation from a mechanics textbook
  • Intesar
  • · Replies 21 ·
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21
Finding Angular Momentum Along x-Axis for t given z(0) = 0, ˙z(0)=0
  • MyoPhilosopher
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6
Normalization constant A of a harmonic oscillator
  • Sorin2225
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7
How to Derive Isospin States in Particle Physics?
  • dunk
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1
Converting a Lagrangian to a Hamiltonian
  • MyoPhilosopher
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3
How is Pion Annihilation Represented in a Feynman Diagram?
  • Physicsphysics
  • · Replies 16 ·
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16
How Accurate is the Initial Mass Function in Predicting Stellar Distributions?
  • Physics Dad
  • · Replies 3 ·
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3
The meaning of the "physical" electron charge in Peskin (Chap 7)
  • niss
  • · Replies 2 ·
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2
Checking Parity Invariance of the QED Lagrangian
  • Gaussian97
  • · Replies 25 ·
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25
The meaning of eignvalues in vibration
  • Zouatine
  • · Replies 1 ·
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1
What are the coefficients of psi_n for this state?
  • SamRoss
  • · Replies 7 ·
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7
Get the current and the EQs of Motion of the Dirac-Lagrangian density
  • JD_PM
  • · Replies 95 ·
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Dimension of Hilbert spaces for identical particles
  • boudreaux
  • · Replies 12 ·
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12
Vector Divergence: Are the Expressions True?
  • Arman777
  • · Replies 4 ·
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4
D'Alembert's principle on a pulley system
  • LuccaP4
  • · Replies 9 ·
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9
Optical depth from radiative transfer equation
  • Kayla Martin
  • · Replies 1 ·
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1
Finding energy eigenvalues with perturbation
  • boudreaux
  • · Replies 1 ·
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1
Annihilation operators of two different types of Fermions
  • Tanmoy
  • · Replies 3 ·
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3
Irradiance of light trapped between two parallel mirrors
  • Sokolov
  • · Replies 11 ·
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11
Streamlines from a complex potential
  • Cloruro de potasio
  • · Replies 1 ·
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1
Covariant coordinates don't co-vary
  • George Keeling
  • · Replies 13 ·
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13
Perturbation Theory - expressing the perturbation
  • Zero1010
  • · Replies 3 ·
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3
S-wave phase shift for quantum mechanical scattering
  • EightBells
  • · Replies 2 ·
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2
Impedance of Circuit (Complex Numbers Question)
  • Irishdoug
  • · Replies 5 ·
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5
Determining orthonormal states to a non-zero inner product
  • electrogeek
  • · Replies 7 ·
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7
Why Is k' Introduced in the Bloch Theorem Derivation?
  • patric44
  • · Replies 3 ·
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3
Finding killing vector fields of specific spacetime
  • Aemmel
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1
Feynman Diagrams for Decay of Δ++ & Ξ- Particles
  • jaoc
  • · Replies 3 ·
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3
Temperature of Bose Einstein Condensation
  • tanaygupta2000
  • · Replies 3 ·
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3
Deriving the Relativistic Transverse Doppler Effect (Circular Motion)
  • stephenklein
  • · Replies 4 ·
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4
Computing the wave function of a square potential
  • CrosisBH
  • · Replies 4 ·
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4
Deriving the Adjoint / Tangent Linear Model for Nonlinear PDE
  • finite_diffidence
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2
How to Derive Matrix Representations for Spin Operators?
  • gabriellelee
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1
Partition function from the density of states
  • snatchingthepi
  • · Replies 3 ·
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3
Simplifying a two-particle system to a one-body problem
  • batclocks
  • · Replies 2 ·
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2
Derivation of the velocity of bloch electrons
  • patric44
  • · Replies 5 ·
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5
Working out harmonic oscillator operators at ##L \rightarrow \infty##
  • JD_PM
  • · Replies 11 ·
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11
Electrostatic field of a sphere
  • gebhaard
  • · Replies 2 ·
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2
Partition Function for Spin-1 One Dimensional Ising Model
  • pauladancer
  • · Replies 3 ·
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3
Integral Involving the Dirac Delta Function
  • gabriellelee
  • · Replies 13 ·
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13
Levi-Civita symbol and its effect on anti-symmetric rank two tensors
  • Jason Bennett
  • · Replies 2 ·
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2
Finding the velocity of a relativistic rocket
  • Arman777
  • · Replies 17 ·
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17
Lagrangian with angular velocity not constant
  • pepediaz
  • · Replies 18 ·
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18
Show the invariance of the complex-scalar-field Lagrangian
  • JD_PM
  • · Replies 24 ·
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24
Centripetal force for off-centered cylinders rolling down a curve
  • caesium
  • · Replies 12 ·
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12
How is the Electric Field in Energy Bands Calculated?
  • jisbon
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1
How to care about only one particle in a two-particle system
  • snatchingthepi
  • · Replies 3 ·
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3
Potential vector (A) of a disk with a surface current
  • Cloruro de potasio
  • · Replies 5 ·
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5
Controlled-Z gate as a product of exponentials
  • EightBells
  • · Replies 1 ·
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1
How can I apply single qubit gates and CNOT to 8x1 column vectors?
  • EightBells
  • · Replies 1 ·
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1
Get the equation of motion given a Lagrangian density
  • JD_PM
  • · Replies 18 ·
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18
Projective measurements of quantum processor
  • EightBells
  • · Replies 1 ·
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1
Perturbation treatment of hydrogen molecular ion
  • patric44
  • · Replies 15 ·
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15
Qubit Operations: Finding U Gates & Probabilities
  • EightBells
  • · Replies 1 ·
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1
Compensation Doping: Adding Boron Atoms
  • jisbon
  • · Replies 1 ·
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1
EOM of simple pendulum submerged in a fluid
  • Saptarshi Sarkar
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2
Questions on Plane Wave Superposition
  • andrew chen
  • · Replies 2 ·
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2
Proving DC Current Loop Does Not Radiate w/ Lienard-Wiechert Potential
  • Rafa_Tapia
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1
What is the relationship between polarization vectors and spin in QFT?
  • RicardoMP
  • · Replies 1 ·
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1
Why Is Acetone's Pressure Relevant in Determining Air Pressure in a Tank?
  • Mark Gerts
  • · Replies 8 ·
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8
Kronecker Delta & Levi Civita manipulation
  • MichaelAlexDavM
  • · Replies 7 ·
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7
Computing an Energy-Momentum tensor given a Lagrangian
  • JD_PM
  • · Replies 30 ·
2
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Calculate pump height by using the Bernoulli Equation
  • sci0x
  • · Replies 15 ·
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15
Fundamental equation and state equations of the ideal gas
  • fluidistic
  • · Replies 1 ·
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1
Plotting the radial wave function of Deuteron in a finite well
  • TopologyisGeometry
  • · Replies 3 ·
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3
Is the Quadrupole Moment Non-Zero?
  • ispivack
  • · Replies 2 ·
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2
Why is My Calculation of Φ Incorrect?
  • gremio594
  • · Replies 6 ·
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6
Ammonia Rankine cycle heat engine calculation
  • Biodelta
  • · Replies 6 ·
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6
Kinetic energy of a disk that is rolling and not slipping
  • Mohamed BOUCHAKOUR
  • · Replies 4 ·
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4
Infinite Square Well Expansion: Mass m in Ground State
  • Irishdoug
  • · Replies 2 ·
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2
Statistical Mechanics: Two systems reaching an equilibrium temperature
  • tanaygupta2000
  • · Replies 11 ·
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11
Proof of the commutator ## [P^2,P_\mu]=0 ##
  • RicardoMP
  • · Replies 1 ·
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1
Infinitesimal coordinate transformation of the metric
  • shinobi20
  • · Replies 1 ·
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1
A mathematical derivation in Peskin and Schroeder on page 722.
  • MathematicalPhysicist
  • · Replies 1 ·
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1
Fluid dynamics and incompressible fluids
  • dunk
  • · Replies 22 ·
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22
Calculation of g-factor correction in Peskin p. 196
  • niss
  • · Replies 6 ·
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6
The variation of the information content of a large Einstein solid
  • Ted Ali
  • · Replies 1 ·
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1
Spatial Wave function of two indistinguishable particles
  • Zero1010
  • · Replies 26 ·
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26
How to Find Eigenstates for Value 0 in Projection on Coherent States Paper?
  • Heidi
  • · Replies 2 ·
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2
Quadrature distribution for an optical mode in the coherent state
  • proton4ik
  • · Replies 2 ·
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2
Equilibrium concentration of co2 in beer
  • sci0x
  • · Replies 4 ·
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4
Statistical Mechanics Occupation number
  • tanaygupta2000
  • · Replies 2 ·
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2
Why is the Coefficient of cosθ Negative in the Exact Pendulum Solution?
  • Saptarshi Sarkar
  • · Replies 4 ·
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4
Understanding Energy of Particles with 'x' Degrees of Freedom
  • tanaygupta2000
  • · Replies 4 ·
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4
Statistical Mechanics: Four non-interacting particles are confined in a box
  • tanaygupta2000
  • · Replies 26 ·
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26