Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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Spin 1/2 systemin Sakurai quantum mechanics
- BREAD
- · Replies 3 ·
Time taken for water to drain from a tank through a pipe (fluid mech./Bernoulli)
- tome101
- · Replies 2 ·
Calculating angle of ball after collision
- Felicity Wang
- · Replies 2 ·
Is there no translational energy?
- TheCanadian
- · Replies 6 ·
Thermodynamics problem (zemansky 3.1)
- Titan97
- · Replies 3 ·
Energy Transformation Efficiency Problem
- hamza2095
- · Replies 2 ·
Finding flux from electric field
- Titan97
- · Replies 27 ·
Predict the position of a particle on a rigid body
- xyge
- · Replies 8 ·
The power delivered by gravity?
- jamal.kun
- · Replies 1 ·
Lorentz transformation matrix from observer A to observer C
- Isaac Pepper
- · Replies 4 ·
Maximum height of CM of a rotating stick
- Joe8
- · Replies 3 ·
What happens if i lift a weight on bathroom scales
- Michhcim
- · Replies 2 ·
Charging capacitor in RC circuit with parallel resistors
- kostoglotov
- · Replies 3 ·
Wave reflection and inversion at rigid vs soft boundaries
- FreezingFire
- · Replies 6 ·
Solving the Mass of a Chain Hanging from a Ceiling
- redivider
- · Replies 1 ·
Motion of parallel-incoming particles in gravitational field
- Aaronaut
- · Replies 2 ·
Grounding parallel plate conductors
- erisedk
- · Replies 14 ·
Confusing mechanics(Extracted from my university physics paper)
- aerograce
- · Replies 17 ·
Why do I get 15000 instead of 9600 for this barometer problem?
- stuc
- · Replies 11 ·
Calculate electric field given the magnetic field
- whatisreality
- · Replies 1 ·
4kg block on spring hit by 50g bullet: find amplitude
- abobo37
- · Replies 6 ·
Instant center of Velocity (check if I did it correctly)
- SagarPatil
- · Replies 4 ·
Depth of a well (using speed of sound)
- halo168
- · Replies 6 ·
Determine the wavelength of the scattered photon
- Mighalo
- · Replies 2 ·
Finding terminal velocity by dropping a bun-case from increasing heights
- MBBphys
- · Replies 1 ·
How Does a Bugler Control Frequency with Lip and Air Pressure Adjustments?
- halo168
- · Replies 1 ·
Modelling the height of a block up a slope with time
- oMattz
- · Replies 1 ·
In which direction does static friction point?
- Warlic
- · Replies 3 ·
When is acceleration positive when speed is decreasing?
- SydneyQuynn
- · Replies 3 ·
Estimate diffraction angle - homemade spectrometer
- Jon.G
- · Replies 2 ·
Find the height and the velocity of the object
- prishila
- · Replies 7 ·
Finding current with resistors in parallel and a short circuit
- Gbox
- · Replies 23 ·
Is My Assumption About Rope Tension Correct?
- stuc
- · Replies 32 ·
Which friction applies to the inner object in a two-surface system?
- sidt36
- · Replies 5 ·
Can you find the velocity of a motorcycle launching off a parabolic ramp?
- djiberal
- · Replies 1 ·
At what angle does the normal force go to zero?
- romogirl
- · Replies 7 ·
Why does work equal potential energy when lifting a mass to rest?
- hamza2095
- · Replies 6 ·
How Do You Calculate the Mass of a Moving Ball After Collision?
- Mrchilko
- · Replies 10 ·
Finding work done by friction on a box
- 99gray
- · Replies 2 ·
What is the Internal Resistance of the Battery in this Circuit?
- Gbox
- · Replies 6 ·
A charge experiencing simple harmonic motion
- PhotonSSBM
- · Replies 7 ·
Total electric potential energy
- betelgeuse91
- · Replies 2 ·
Best time interval for measuring capacitor discharge?
- accountdracula
- · Replies 2 ·
Would a Force vs. Acceleration Graph Lie in Both Quadrants One and Three?
- Physicsguru21
- · Replies 6 ·
Iron Core Solenoid: Calculating Applied Field and Magnetisation
- sa1988
- · Replies 4 ·
Why Does Enthalpy of Saturated Vapour Increase with Temperature?
- r.physics
- · Replies 1 ·
Calculating the Velocity and Distance of Two Colliding Planets using Gravity
- Hashiramasenju
- · Replies 13 ·
Inelastic Collisions and the Limitations of Conservation of Energy
- PeteSeeger
- · Replies 4 ·
Simple harmonic motion - initial acceleration
- Tzabcan
- · Replies 7 ·
How can I find the minimum index of refraction?
- mbnMecha
- · Replies 7 ·
Calculating the velocity of a target and embedded projectile
- NewtonIsAmazing
- · Replies 18 ·
What Index of Refraction is Needed for a 104nm Coating to Cancel 550nm Light?
- Callix
- · Replies 10 ·
Deriving the Equation for 2-D Elastic Collision Circle
- Christoffelsymbol100
- · Replies 7 ·
How Does a Marble's Speed Change as It Rolls Down a Hemispherical Bowl?
- L Knope
- · Replies 1 ·
What is the Energy Transmitted by a Plane EM Wave Passing Through a Window?
- Wesley Strik
- · Replies 2 ·
Find Mass 2 with Momentum Conservation
- Matthew_Maz
- · Replies 9 ·
Angular momentum and central force
- spacetimedude
- · Replies 9 ·
Work/Energy - Incline Plane w/ Friction
- De_Dre01
- · Replies 26 ·
Diffraction Grating Relationship Question
- Callix
- · Replies 1 ·
Projectile Motion - A classical mechanics problem
- Erkan Tur
- · Replies 1 ·
Frequencies of the first three overtones in a string?
- Tom Beckham
- · Replies 2 ·
What is the potential difference across the parallel resistors in a circuit?
- Drizzy
- · Replies 4 ·
Easy density question--no answer given
- chawlasimrank
- · Replies 5 ·
Which circuit can cause damage in the ampmeter or voltmeter?
- Drizzy
- · Replies 1 ·
Classical mechanics: Projectile Motion
- REVIANNA
- · Replies 4 ·
Is Newton's 3rd Law Cancelled in This Friction Problem?
- Lisciu
- · Replies 6 ·
Solving the 2kg Cart Homework Problem
- jvalencia
- · Replies 8 ·
Fluid Dynamics: Static pressure in compressible Liquids
- FreezingFire
- · Replies 2 ·
Why is centripetal acceleration zero when a pendulum is released?
- REVIANNA
- · Replies 13 ·
An experiment from which you can calculate terminal velocity
- Zara-!@#$*
- · Replies 6 ·
Horizontal force on a bicycle dependent on center of mass?
- Imperial Sky
- · Replies 1 ·
Interpreting questions like this (About waves)
- superconduct
- · Replies 11 ·
At what angle should the bomb be released?
- Alpha123
- · Replies 4 ·
Finding Second Moment of Inertia for Shaded Area Through Centroid?
- werson tan
- · Replies 3 ·
How big is the comet based on a 735x731px surface picture taken from 3km away?
- member578757
- · Replies 10 ·
Calculating horizontal difference in spring-ball situation
- foreverconfused
- · Replies 1 ·
Centroid of an Area - Finding X & Y Coordinates
- werson tan
- · Replies 11 ·
Derivation of formula of centroid
- werson tan
- · Replies 3 ·
Person climbing rope on pulley with equal mass box
- Tibriel
- · Replies 1 ·
Proving things for an arbitrary rigid body with an axis of symmetry
- B3NR4Y
- · Replies 4 ·
How Is the Centroid of a Composite Area Calculated Incorrectly Here?
- werson tan
- · Replies 1 ·
Why did aluminium foil cool faster than black paper in water cooling experiment?
- Jimmy87
- · Replies 9 ·
Maximum load that a 2mm steel cable can hold.
- TheSodesa
- · Replies 2 ·
Easy conservation of energy problem? (long jump)
- emmakr
- · Replies 5 ·
Terminal velocity of a bicycle under a constant force
- Imperial Sky
- · Replies 2 ·
What is the electric field inside a coaxial cable with given charge densities?
- PrincessYams
- · Replies 7 ·
Finding Work Done by Gravity on Inclined Crate
- bob tran
- · Replies 6 ·
Intr rocket science: How calculate mass ratio and propellant
- Dianainthesky
- · Replies 2 ·
How Is the Spring Constant Calculated from Work Done?
- bob tran
- · Replies 10 ·
Back emf in loudspeaker coil with 112 microH inductance
- lloyd21
- · Replies 4 ·
Calculating Entropy Change in Niagara Falls Waterfall
- XianForce
- · Replies 1 ·
Calculating Initial Mass for Nuclear Reactor Operation
- Rath123
- · Replies 5 ·
String wrapped around a Disk with 4 Rods
- Oribe Yasuna
- · Replies 19 ·
Special relativity -- Proper time
- Lito
- · Replies 3 ·
Man connected to harness standing on plank
- Jtwa
- · Replies 17 ·
Finding Reactance Ratio in Electrical Resonance
- crom1
- · Replies 20 ·
Why impulse from F·Δt doesn't match m·Δv for wagon problem
- Bengalfan985
- · Replies 2 ·
Why are the peaks in the Franck-Hertz experiment broad?
- tayles123
- · Replies 1 ·
Temperature of ideal gas in a cylinder
- Boomzxc
- · Replies 7 ·