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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Potential at a point inside a solid non conducting uniformly charged sphere
- Rhdjfgjgj
- · Replies 4 ·
Why is there are precession frequency here?
- simphys
- · Replies 1 ·
How Does Centripetal Force Influence the Flight of a Rubber Band?
- Anonim2831
- · Replies 6 ·
Calculating relative velocity -- Jumping between two moving trains
- verkamp
- · Replies 3 ·
Ohm's Law confusion -- How to handle an incandescent bulb?
- hendrix7
- · Replies 7 ·
Calculating Torque on this Square
- Addie M
- · Replies 20 ·
The velocity of a satellite rotating around the Earth
- yashboi123
- · Replies 3 ·
Doubt Calculating the Total Displacement for this Person Walking
- Remle
- · Replies 6 ·
Brightness of two lamps in a circuit having a changing magnetic field
- songoku
- · Replies 10 ·
Which material has the greatest Young's Modulus?
- songoku
- · Replies 2 ·
How many discs will slide off the board as it decelerates?
- Lotto
- · Replies 17 ·
Correct energy transformation about circuit with EMF, a resistor and a motor
- songoku
- · Replies 11 ·
Momentum in a Head-on collision
- Rayan
- · Replies 2 ·
Contradictory Sources: Trying to understand waves on a rope being reflected at a boundary
- AsemEzzat
- · Replies 22 ·
Assistance in cutting down unneeded information in physics report
- mostafaelsan2005
- · Replies 7 ·
2 masses connected by spring, one is pulled, how much does the spring stretch?
- Obliv
- · Replies 3 ·
Questions about speed and motion of a toy car on a conveyor belt
- Tonyapplepan
- · Replies 11 ·
Diffrence between resolving vector to components and find projections
- Mohmmad Maaitah
- · Replies 4 ·
Two Equations for Average Velocity?
- Spooky123
- · Replies 2 ·
Will The Cars Stop In Time? - Check My Work Please :)
- valleyldp
- · Replies 13 ·
How can a transistor behave as a switch in the saturated region?
- sachin
- · Replies 5 ·
Electric field in a second dielectric given a 2 dielectric system
- willDavidson
- · Replies 2 ·
Atwood at an incline accelerating down
- Enginearingmylimit
- · Replies 2 ·
Coherent interference at a low photon flux rate
- tistemfnp
- · Replies 3 ·
Work done during a collision -- Change in Kinetic Energy & change in Momentum
- Aerisk16
- · Replies 1 ·
What is the rocket's initial acceleration?
- JoeDGreat
- · Replies 6 ·
Working mechanism of straws and siphon
- sss1
- · Replies 1 ·
Magnetic field in a solenoid with rectangular cross-sectional area
- Hak
- · Replies 25 ·
Calculations involving different Dielectrics and Capacitors
- as2528
- · Replies 7 ·
Why Does Torque Equilibrium Not Solve for Fcy in Static Equilibrium Problems?
- Sunwoo Bae
- · Replies 9 ·
Special Relativity problem: Lorentz transformation and Reference Frames
- James Chase Geary
- · Replies 6 ·
Why can a fluid that satisfies the continuity equation cross streamlines?
- tracker890 Source h
- · Replies 14 ·
E&M: Gauss' Law Surface Charge Density
- Wmdajt
- · Replies 4 ·
What force is needed to break a rope?
- Lotto
- · Replies 8 ·
Particle experiencing only an angular force, determine the r dot
- flinnbella
- · Replies 15 ·
A circuit involving two non-linear resistances (incandescent lamps)
- Jan Vesely
- · Replies 14 ·
Q: Confusing Conservation of Mass Flow Rate and Conservation of Flow Rate
- tracker890 Source h
- · Replies 19 ·
Why Was My Thread Closed on the Physics Forum?
- imbumb
- · Replies 22 ·
Is My Approach to Calculating Relative Velocity Correct?
- Aurelius120
- · Replies 20 ·
Difficulty in deciding when to apply work energy theorem
- physicsissohard
- · Replies 2 ·
Rydberg constant for hydrogen atom and Balmer series
- sss1
- · Replies 2 ·
Work done by gravity on a car rolling down a hill
- physicsmaster123
- · Replies 4 ·
Basketball thrown straight up from the ground
- yashboi123
- · Replies 1 ·
Q: The instantaneous gas discharge of the system and the C-E
- tracker890 Source h
- · Replies 9 ·
Problem with when to use Force and Energy. What compresses spring/
- physicsissohard
- · Replies 3 ·
Question about Formulae for Motion in a Rotating Reference Frame
- Master1022
- · Replies 2 ·
Fraction of light reflected inside a diamond
- Davidllerenav
- · Replies 5 ·
Estimating Error in Wavelength from Graphical Approach
- PhysicsRock
- · Replies 11 ·
What will the final velocity of the particles be?
- Lotto
- · Replies 7 ·
Faraday's law -- Confusion about which Area to use in calculations
- yymm
- · Replies 3 ·
Switching reference frames between two intersecting lines
- John3509
- · Replies 10 ·
Why is there no acceleration in the southern/y direction?
- yashboi123
- · Replies 10 ·
Coaxial semi-infinite solenoid and superconducting disc
- Hak
- · Replies 39 ·
I need feedback on MCQ test in IJSO style
- AlexJicu08
- · Replies 26 ·
Ratio of Excited Neon Atoms in 5s compared to 3p
- jjson775
- · Replies 4 ·
What force is needed to push out this slab on the bottom of the stack?
- Lotto
- · Replies 10 ·
What is the Resultant Force from adding these two forces?
- DIANAWIELT
- · Replies 20 ·
Explain the phenomenon of decrement of angular momentum
- AyushNaman
- · Replies 3 ·
Verifying the acceleration of gravity in our lab (help with error please)
- feynmansorange
- · Replies 7 ·
Consideration of number of significant figures in experimental quantities
- f3sicA_A
- · Replies 6 ·
Converting Energy to Mass: Understanding the Relationship Between MeV and kg
- Saibot
- · Replies 8 ·
Verification of ideal gas law experiment
- Voltux
- · Replies 5 ·
Calculating components of a third-quadrant vector
- Joe_mama69
- · Replies 2 ·
Standard angles for vectors (Mechanics)
- Joe_mama69
- · Replies 4 ·
Calculate the torque that is produced by this force on a cylinder
- MatinSAR
- · Replies 5 ·
Inductance Puzzle involving coplanar conducting rings
- Hak
- · Replies 5 ·
The theory behind sound generation from spinning objects
- Juan2g19
- · Replies 7 ·
Box on treadmill connected to a spring
- MigMRF
- · Replies 8 ·
I need opinions on a Projectile Motion problem that I made up
- AlexJicu08
- · Replies 11 ·
How Does Lenz's Law Explain the Jumping Ring Phenomenon?
- sss1
- · Replies 8 ·
Resolving Velocity Components in Constrained Motion
- decentfellow
- · Replies 6 ·
Coulomb's Law Application: A charge repelling a mass on a frictionless incline
- DanielGuh
- · Replies 9 ·
What is a Solid Angle and How is it Calculated?
- j04015
- · Replies 22 ·
Needs clarity on this displacement vector diagram
- Chijioke
- · Replies 3 ·
RLC circuit resonance experiment
- Shreya
- · Replies 10 ·
Conceptual doubt on frames of reference
- physicsissohard
- · Replies 1 ·
Problem with Dynamic blocks on a fixed inclined plane
- physicsissohard
- · Replies 10 ·
Why are they using Cosine instead of Sine for Cross Product?
- yashboi123
- · Replies 2 ·
Homework help with interpreting SUTAV questions
- Physics_is_beautiful
- · Replies 5 ·
How much work is done to hold a book at a constant height?
- ktsa
- · Replies 10 ·
Are the Battery Capacity Calculations for Electric Vehicles Correct?
- PhysicsTest
- · Replies 4 ·
About critical damping resistance of a ballistic galvanometer
- phymath7
- · Replies 6 ·
Statics problem on the resolution of forces
- CIA16
- · Replies 18 ·
Olympiad question on destructive interference
- Glenn G
- · Replies 3 ·
Solve for the sum of 3 cable forces on one anchor point
- aatari
- · Replies 6 ·
How can I pluck strings (with changing length) with constant energy?
- mt1815
- · Replies 1 ·
Graphing the Power dissipated in a resistor
- guyvsdcsniper
- · Replies 1 ·
Particle moving from one potential to another
- gionole
- · Replies 13 ·
Rate of EM emission based on surface characteristics
- druscilla
- · Replies 6 ·
Electric field between parallel plates
- lys04
- · Replies 4 ·
Finding the center of mass of a simple 2D shape
- JohnnyLaws
- · Replies 9 ·
Calculating low frequency cutoff for this R-C microphone circuit
- songoku
- · Replies 43 ·
What is the explanation for the divergence of the vector function r^hat/r^2?
- guyvsdcsniper
- · Replies 13 ·
Change in system entropy in relation to heat transfer
- tracker890 Source h
- · Replies 2 ·
Electric field in nonmagnetic material given a magnetic field
- PeterV
- · Replies 1 ·
Does weight affect braking distance for transport trucks?
- phil4321
- · Replies 27 ·
Finding the time for an object to start rolling without slipping
- member 731016
- · Replies 4 ·
Spring momentum conservation problem
- member 731016
- · Replies 4 ·