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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Is This Electric Field Representation Accurate?
- laser
- · Replies 28 ·
How to answer this question, 21-cm emission line
- jqmhelios
- · Replies 2 ·
Uncertainty Error and Significant Figures in this Force Tables Lab
- Albertgauss
- · Replies 4 ·
Constrained motion of a ring along a horizontal rod
- arham_jain_hsr
- · Replies 17 ·
A 3.5 nC charge is at the origin and a -10 nC charge is at x = 2 cm
- Count
- · Replies 5 ·
Charge on inner/outer surfaces of two large parallel conducting plates
- zenterix
- · Replies 11 ·
Rating speeds from least to greatest from a position time graph
- Ineedhelpwithphysics
- · Replies 1 ·
Gravitation Potential Energy -- Questions about calculating the sign of GPE
- Quantum Psi Inverted
- · Replies 2 ·
Calculating Time Dilation for Space Travelers
- stunner5000pt
- · Replies 4 ·
How many independent components does a tensor have?
- MatinSAR
- · Replies 18 ·
Derivation Of Torque On Current Loop Due To Uniform Magnetic Field
- Aurelius120
- · Replies 4 ·
Understanding Inductance and Induced EMF in Simple Circuits
- Meow12
- · Replies 49 ·
Direction of the magnetic needle
- Darshit Sharma
- · Replies 11 ·
How Does Voltage Affect LED Color Through Band Gap Adjustments?
- Janusz Bednarski
- · Replies 1 ·
Potential Mistake in Free-Body Diagram
- TRB8985
- · Replies 5 ·
Errors in Experiment with Low and High Conductivity Materials
- john325
- · Replies 2 ·
A confused Compass Needle between two solenoids
- Darshit Sharma
- · Replies 31 ·
Magnetic field pointing into a normal magnetized compass needle
- Darshit Sharma
- · Replies 16 ·
Deduction about Magnetic Poles surrounding a Conductor
- Darshit Sharma
- · Replies 40 ·
Tension Question with One Mass and Two Pulleys
- singh101
- · Replies 7 ·
Why Do I Get Negative Values Solving the SHM Spring Problem?
- torinketo
- · Replies 3 ·
Hamiltonian Function thru new Variables Q,P -- Show that Q is cyclic
- ardaoymakas
- · Replies 5 ·
Stretching of a rotating spring
- L0r3n20
- · Replies 8 ·
A Question about the Double Atwood Machine
- Minming
- · Replies 16 ·
E&M: Forces resulting from Charges at the Corners of a Cube
- cherry
- · Replies 13 ·
Compare the ratio of two times t1/t2 in this vertical jump
- Clockclocle
- · Replies 3 ·
Centripetal Acceleration while Swinging a Stone on a String
- singh101
- · Replies 9 ·
Homework help: Dropping a sand bag from a Hot Air Balloon
- Clockclocle
- · Replies 3 ·
Physics Torque Equilbrium Question
- singh101
- · Replies 11 ·
How Does Longitudinal Stress Affect a Body's Internal Tension?
- Physicsnb
- · Replies 34 ·
How Do SI Units Affect Calculations in Fluid Statics?
- clueless8
- · Replies 6 ·
What Factors Cause a Water Container to Tip Over When Accelerated?
- kbannister
- · Replies 8 ·
Feynman's Lectures exercise about Newton's laws
- sefatod
- · Replies 13 ·
Air pressure changes in a vessel as the vessel volume increases
- shotdove
- · Replies 8 ·
Quantum Mechanics I, finding impuls wavefunction.
- milkism
- · Replies 6 ·
Syntax Error? x and y components of E field in unit vector form
- zelikman
- · Replies 13 ·
Direction of current as bar magnet moves uniformly through copper ring
- Meow12
- · Replies 3 ·
What Does exp Mean in Mathematical Expressions?
- cryforhelp104
- · Replies 5 ·
Time interval between intermediate passing of two rods....
- Apashanka
- · Replies 15 ·
Intensity and electric field amplitude
- LCSphysicist
- · Replies 7 ·
Electron bound to proton by gravity
- Juli
- · Replies 3 ·
Conceptual misunderstanding in applying formula for work done in adiabatic compression
- physicsissohard
- · Replies 10 ·
What is ##Tds## in this equation : ##dU = Tds - PdV##
- MatinSAR
- · Replies 14 ·
Measuring the Velocity of Sound in this Lab Exercise
- srnixo
- · Replies 19 ·
Confused about a conservation of energy problem
- BikGer2
- · Replies 4 ·
Can an Electron Be Observed in a Light Microscope?
- Juli
- · Replies 10 ·
How does thermal stress affect the length of a constrained rod?
- Physicsnb
- · Replies 10 ·
Tangent Angles for Lines of Force, Two Equal Positive Charges
- Ben2
- · Replies 29 ·
Understanding E subscript R Notation in the Context of General Relativity
- robotkid786
- · Replies 11 ·
Would conservation of momentum apply in this vehicle accident homework problem?
- lioric
- · Replies 23 ·
Volume's effect on buoyancy: Does pressure increase?
- basem12
- · Replies 11 ·
Stokes' law and falling sphere method
- xenoidmaster
- · Replies 3 ·
Magnetic field due to a long, straight wire
- Meow12
- · Replies 3 ·
Final Project (Matura Project) About The Wave Pendulum
- cyberspacy_
- · Replies 2 ·
Troubleshooting Circular Motion: Solving the Toy Car Loop Puzzle
- Witdouck K
- · Replies 8 ·
A rope, a pole, and some tension
- Quantum Psi Inverted
- · Replies 11 ·
Understanding Time Measurement in Physics: Uncertainty and Calculations
- srnixo
- · Replies 6 ·
What is the definition of a way and how does it relate to travel?
- mancity
- · Replies 42 ·
What is the energy difference between the peaks in the Zeeman effect?
- Rayan
- · Replies 7 ·
How Do You Solve Equilibrium Problems Using Moments?
- TheePhysicsStudent
- · Replies 6 ·
Force between poles of two magnets
- Meow12
- · Replies 1 ·
Newton's shell theorem - all mass is concentrated at its centre
- laser
- · Replies 16 ·
Need help on some mechanics questions from a text book
- TheePhysicsStudent
- · Replies 8 ·
Electromagnetic induction (Faraday's law)
- Meow12
- · Replies 7 ·
Balancing Torques and Forces on this Beam
- Quantum Psi Inverted
- · Replies 16 ·
Maximize Your Swinging Ball Force with These Expert Tips
- ritzcrackers
- · Replies 4 ·
Help about the unit vectors for polar coordinates in terms of i and j
- srnixo
- · Replies 13 ·
Tangential acceleration of proton due to a changing magnetic field
- Meow12
- · Replies 10 ·
Does the Variable ##t## Represent Multiple Concepts in Physics Problems?
- kanekiyura
- · Replies 3 ·
Investigation regarding the rotor ride
- Inaaya
- · Replies 8 ·
JEE solution wrong? (tempco of a clock)
- physicsissohard
- · Replies 14 ·
Pressure inside a sealed container
- brochesspro
- · Replies 9 ·
Average velocity ##\bar{v}## for a uniformly accelerating particle
- brotherbobby
- · Replies 8 ·
Angular velocity of a loop after being struck by bullet
- brochesspro
- · Replies 57 ·
Destroying a Building Using a Lens
- ab200
- · Replies 8 ·
Irreversible isothermal Process Work External pressure not provided
- Aurelius120
- · Replies 4 ·
Finding the focal length of a converging lens with VERY limited info
- Overdose_
- · Replies 7 ·
A window cleaner holding his platform up with a rope and pulley
- PAULLIM
- · Replies 15 ·
Is enthalpy just the sum of internal energy and work against external pressure?
- Aurelius120
- · Replies 5 ·
Mistake in Exercises for the Feynman Lectures?
- suh112
- · Replies 2 ·
Finding Gauge Pressure in this Manometer
- atpeef
- · Replies 31 ·
Monkey accelerating up and down a rope
- Iamconfused123
- · Replies 38 ·
Ways of transferring charge between objects (conduction and induction)
- MatinSAR
- · Replies 25 ·
What is the Relationship Between Restoring Force and Angle in a Pendulum?
- mancity
- · Replies 7 ·
How to define vectors in spherical coordinate system?
- f3sicA_A
- · Replies 2 ·
For the friction formula when to use Fn(normal force)×mu and when F×mu
- Iamconfused123
- · Replies 17 ·
Why did I get two different results for the mass m2?
- Iamconfused123
- · Replies 19 ·
Uncertainty principle if only one velocity direction is known
- Janusz Bednarski
- · Replies 13 ·
Dead simple physics question (still a puzzle to me)
- Bobthefreeradical
- · Replies 13 ·
Physics - electrostatic exercise with 4 charges at the corners of a square
- Hanz_
- · Replies 4 ·
Finding the currents in this circuit (2 voltage sources and 3 resistors)
- Nat1234123
- · Replies 10 ·
Effect on visibility of thin films due to interference
- brochesspro
- · Replies 35 ·
In which direction is the magnetic field at point P?
- Meow12
- · Replies 12 ·
Motion of Sphere Rolling Down Rotating Cone
- qianqian07
- · Replies 9 ·
Calculate the voltmeter reading for this circuit with 2 sources and 2 resistors
- songoku
- · Replies 5 ·
What is the net force on the current loop?
- Meow12
- · Replies 8 ·
Different forms of Stokes' theorem
- MatinSAR
- · Replies 3 ·
Wooden sphere rolling on a double metal track
- Hak
- · Replies 97 ·