Free advanced physics homework help via qualified mentors. Upper undergraduate and graduate level. Please use the template when requesting help and show your work.
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Why do electron-positron annihilation produce two equal-energy photons?
- pyo
- · Replies 3 ·
How to Use Induction to Prove Quantum Commutator Relations?
- belleamie
- · Replies 3 ·
Why Does the Hydrogen-Atom Wave Function Equal R(r)cita(cita)phi(phi)?
- asdf1
- · Replies 3 ·
Alpha in the schrodinger's equation for the harmonic oscillator
- asdf1
- · Replies 4 ·
Energy Eigenvalue: Why is (psi)n=Asin(npix/L)?
- asdf1
- · Replies 5 ·
Why Is the Particle in a Box Height Expressed in eV Instead of Meters?
- asdf1
- · Replies 5 ·
Can Schrodinger's Equation be Transformed into Spherical Polar Coordinates?
- asdf1
- · Replies 3 ·
Electric Field Due to Point Charges?
- ylem
- · Replies 3 ·
Can an Artillery Cannon Hit Any Target on This Surface?
- emptymaximum
- · Replies 14 ·
What Is the Variation of the Action?
- alfredblase
- · Replies 2 ·
Distance Earth-Saturn: Solving the Doppler Effect
- luminether
- · Replies 2 ·
Why does the wave function have to be normalizabled
- asdf1
- · Replies 6 ·
Understanding Coupled Oscillators: Solving for Forces on Two Masses
- Tuneman
- · Replies 3 ·
Observables of position and momentum have a continuous spectrum
- asdf1
- · Replies 2 ·
Constructing the central potential from the orbit
- Chen
- · Replies 5 ·
Finding Bohr Orbit's Quantum # for 0.01mm Hydrogen Atom
- asdf1
- · Replies 2 ·
Solve LaGrange Problem: Rod of Length L & Disk of Radius R
- don_anon25
- · Replies 1 ·
Period of small oscillations in central potential
- Chen
- · Replies 2 ·
How Do You Solve the 3D Non-Isotropic Oscillator Numerically?
- emptymaximum
- · Replies 57 ·
Calculating Ratio of Electron and Positive Ion Mean Free Paths in an Ionised Gas
- RichRobX
- · Replies 1 ·
Line element in spherical coordinates
- broegger
- · Replies 2 ·
How to Convert Cp to Cv for Metals?
- Walkingman
- · Replies 3 ·
Why Does the Disk Have Two Moments of Inertia?
- don_anon25
- · Replies 4 ·
Re: Polarization with three 45 degree polarizers
- shawonna23
- · Replies 1 ·
How Does Wall Composition Affect Heat Loss in a House?
- beanryu
- · Replies 4 ·
Info on wave mechanics prob in one dimension need
- belleamie
- · Replies 1 ·
How do I vary a Poincaré invariant action?
- alfredblase
- · Replies 3 ·
How Does Changing Barrier Width and Parameters k1, k2 Affect Quantum Tunneling?
- leila
- · Replies 1 ·
How Do Elastic and Inelastic Collisions Differ in Complex Systems?
- BananaMan
- · Replies 11 ·
Mass and linear absorption coefficients of air for Cr K(alpha) X-rays
- asdf1
- · Replies 4 ·
Magnetic Field of a long straight wire
- stunner5000pt
- · Replies 1 ·
Insight needed into electromagnetism problem
- Finestructure
- · Replies 2 ·
Can any antiparticle be created during energy to matter conversion?
- sruthisupriya
- · Replies 3 ·
How to calculate K excitation voltage and Cu K-alpha1 wavelength
- asdf1
- · Replies 3 ·
Deriving the relativistic point particle action from Polchinski
- alfredblase
- · Replies 4 ·
Solve Multipole Expansion Problem: Find Exact Potential on Z Axis
- laminatedevildoll
- · Replies 2 ·
Understanding Circular Orbits and Central Forces and Explanation
- fahd
- · Replies 1 ·
Light Intensity through glass blocks
- Fosock
- · Replies 2 ·
How Does Temperature Influence Grandfather Clock Timing?
- gapgirl1010
- · Replies 4 ·
Relating eigenvalues of the mass matrix to particle masses in coupled Dirac equations
- Pietjuh
- · Replies 1 ·
Why Are Electric Dipole Selection Rules Confusing on the GRE?
- yosofun
- · Replies 3 ·
Boltzmanns statistics and phase space
- 2bootspizza
- · Replies 14 ·
How can I convert unit vectors from cartesian to spherical polar coordinates?
- Beer-monster
- · Replies 2 ·
Why is sigma 2p bonding lower in energy than pi 2p in O2?
- Lisa...
- · Replies 1 ·
Is the 2s Hydrogen Atom Wavefunction Normalized?
- Reshma
- · Replies 12 ·
How Does the Weight of a Pendulum Affect Its Motion?
- gapgirl1010
- · Replies 8 ·
How is the Lagrangian Derived for a Two-Mass Spring System?
- don_anon25
- · Replies 1 ·
Solving Minimizing Arc Length: Euler-Lagrange Equations
- don_anon25
- · Replies 1 ·
Is There a Way to Prove Normalization of the BCS Equation?
- michaeltorrent
- · Replies 5 ·
Calculating Escape Speed and Orbital Energy in Universal Gravitation
- dekoi
- · Replies 3 ·
How Does the London van der Waals Force Relate to the Casimir Effect?
- Kruger
- · Replies 2 ·
What is the resulting compressional force on Earth?
- dekoi
- · Replies 3 ·
How to Calculate Speed and Collisions of Insulating Objects in Electric Fields?
- dekoi
- · Replies 2 ·
QM - Operator Algebra Problem 2.7 Rojansky
- NoPhysicsGenius
- · Replies 2 ·
What is the method for calculating ion radii in a NaCl structure?
- broegger
- · Replies 6 ·
Mean Free Path of an Electron -
- dekoi
- · Replies 4 ·
Finding a formula for wind force on a paper sail
- The Bob
- · Replies 2 ·
Magnetic Field of a long wire bent into a shape
- stunner5000pt
- · Replies 8 ·
Magnetic field of a hairpin wire at points near and far from the bend
- stunner5000pt
- · Replies 11 ·
What Is the Coefficient of Drag for a Tennis Ball?
- Bonulo
- · Replies 2 ·
Which Shape Maximizes the Magnetic Field at the Center: Circle or Square?
- stunner5000pt
- · Replies 4 ·
Laser pointer visibility on projector screens and CW lasing criteria
- doctortim
- · Replies 4 ·
Kinetic theory of gases in cylinder
- abstrkt
- · Replies 1 ·
Differential equation based on Kirchoff's voltage law
- asdf1
- · Replies 2 ·
Calculating fermi energyfor magnesium
- starissomewhat
- · Replies 1 ·
Movement of Center of Mass for a Pulled Down Cable
- standardflop
- · Replies 10 ·
Arbitrary travelling wave on string (griffiths 9.5)
- DE7
- · Replies 1 ·
Gaussean Surfaces [Can they pass through charge distributions?]
- maverick280857
- · Replies 25 ·
Effect of Fringing on Capacitance
- maverick280857
- · Replies 3 ·
Point charge placed in the vicinity of two plates
- maverick280857
- · Replies 4 ·
Find # of Independent Components of Riemann Curvature in D Dimensions
- dextercioby
- · Replies 2 ·
How to Find the Density of an Ideal Gas Around a Planet?
- goulio
- · Replies 9 ·
How Far Can a Person Walk on an Overhanging Plank Before It Tips?
- TastyTyr
- · Replies 3 ·
What's the magnitude of the magnetic force acting on the particle?
- lonelygirl
- · Replies 5 ·
Why does charge accumulate at the sharpest point?
- jdstokes
- · Replies 7 ·
Calculating Pool Depth with 48 Degrees Depression Angle
- arvin305
- · Replies 1 ·
Is the Condition for an Energy Gap Equivalent to Bragg Refraction?
- painfive
- · Replies 1 ·
Bragg Diffraction: Axes Length for FeO, CoO, NiO
- broegger
- · Replies 5 ·
Calculating Frequency of Oscillation of Plank on Rotating Wheels
- noblesavage8
- · Replies 2 ·
Magnetic field for a single-layer solenoid
- asdf1
- · Replies 2 ·
Can a Rotation of 180º Leave a Spin-2 System Hamiltonian Unchanged?
- shetland
- · Replies 4 ·
Numeric algorithm (of projectile motion with drag)
- Bonulo
- · Replies 1 ·
Distribution function of an ideal gas
- gdumont
- · Replies 3 ·
Find the tension a in the string as a function of height a
- pyrothai
- · Replies 2 ·
Solving Atom Velocity in Non-relativistic Limit
- Chen
- · Replies 4 ·
How Do You Solve These Thermodynamics Problems?
- ChronicQuantumAddict
- · Replies 6 ·
How Do You Calculate Time in the Brachistochrone Problem?
- hriby
- · Replies 1 ·
Most probable radial distance for 4f state and selection rules for photon absorption
- schattenjaeger
- · Replies 1 ·
What is the EMF generated in the loop?
- iggybaseball
- · Replies 1 ·
Force and Torque of a Clockwise Current Loop in Magnetic Field
- stunner5000pt
- · Replies 1 ·
Does this engine violating Carnot efficiency deserve investment?
- ChronicQuantumAddict
- · Replies 3 ·
Does Converting Water to Ice Increase the Entropy of the Universe?
- ChronicQuantumAddict
- · Replies 1 ·
Entropy and damping osscilations
- ilovephysics
- · Replies 2 ·
How Does a Cavity and Geometry Affect Electric Fields in Linear Dielectrics?
- mathlete
- · Replies 1 ·
Where Can I Find the Value of the Sum of 1/n² for Odd n Only?
- *melinda*
- · Replies 3 ·
Lagrangian Dynamics problem - with setup
- don_anon25
- · Replies 1 ·
Some one me with part B. (Simple Harmonic Motion)
- bochai
- · Replies 3 ·
Lower Indices Tensor in Special Relativity: What to Know?
- Palindrom
- · Replies 5 ·
Proving Force on Arbitrary Wire Same as Straight Wire
- stunner5000pt
- · Replies 5 ·
How to Estimate Contact Time Between Racquet and Tennis Ball?
- standardflop
- · Replies 8 ·