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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Spherical Capacitor: Calculating Capacitance in pF
- professordad
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Help with electricity, four wires that carry current
- CookieSalesman
- · Replies 6 ·
Net Electric field and electric net force
- lonlyway
- · Replies 2 ·
Constant electric field in the sphere
- Tanya Sharma
- · Replies 4 ·
Speed of a rope sliding off a peg?
- Kavorka
- · Replies 8 ·
Which Coin Flies Off First from a Speeding Turntable?
- alingy1
- · Replies 2 ·
Solve Fusion & Einstein Homework: Energy Output & Mass Conversion
- Sastronaut
- · Replies 1 ·
Elastic glancing collision problem
- kjean
- · Replies 4 ·
Finding impact speed of a high altitude free fall
- Kavorka
- · Replies 2 ·
How Do You Calculate Kinetic Energy in Relativistic Dynamics?
- Scientist94
- · Replies 8 ·
Calculating Wavelength of Longitudinal Wave in Water from Steel
- MasterPnut
- · Replies 1 ·
Problem with the weigth of the moment arm
- SwedishFred
- · Replies 2 ·
Vertical Rod with two masses attached falling over table.
- DeLaHostia
- · Replies 2 ·
What have I done wrong? (torque and angular momentum)
- PhyIsOhSoHard
- · Replies 2 ·
Electron being shot between two plates
- hvthvt
- · Replies 3 ·
How Does a Head Crash Affect Hard Drive Spin Dynamics?
- emmaden
- · Replies 1 ·
A car travelling at 50km/h stops in 70.0m HELP
- lozah
- · Replies 4 ·
Magnetic Field and the resulting force
- adjacent
- · Replies 6 ·
Largest resistor value such that BJT remains in active mode
- theBEAST
- · Replies 2 ·
Which form of particle acceleration is safer?
- dasitmane
- · Replies 1 ·
BJT Circuit Problem Find Vc Quickly
- theBEAST
- · Replies 1 ·
Car moving up Inclined Plane question
- Ronaldo95163
- · Replies 1 ·
How to Determine Mass Flow Rate for Adiabatic Compression of Nitrogen?
- Fluidman117
- · Replies 2 ·
Direction of Compass Needle near a Solenoid
- aadarsh9
- · Replies 10 ·
Linear and circular accelerators
- dasitmane
- · Replies 1 ·
Time taken by a balloon to deflate
- Saitama
- · Replies 17 ·
Non-uniform electric field and conducting spheres
- ifailatlife
- · Replies 5 ·
What is conserved in the system?
- PhyIsOhSoHard
- · Replies 3 ·
Where does the friction come from?
- nomorenomore
- · Replies 5 ·
How to Solve a Friction Problem with Statics
- Jud
- · Replies 8 ·
What Determines the Net Force on Each Box When They Are Slowing Down?
- AZNathanielC
- · Replies 12 ·
Throwing a Rock Up a Hill: Finding Final Vertical Displacement
- Bryson
- · Replies 6 ·
Why Does Enthalpy Decrease on Isothermal Compression?
- sero2000
- · Replies 1 ·
Moment of inertia and angular velocity
- nomorenomore
- · Replies 3 ·
How Do You Find the Position of Antinodes on a String with Fixed Ends?
- MasterPnut
- · Replies 5 ·
Circular motion and energy of a massless spring
- nomorenomore
- · Replies 5 ·
How Do You Calculate the Magnetic Field at a Point Along the Axis of a Solenoid?
- KracniyMyedved
- · Replies 2 ·
Frictional Forces Physics 1 Problem
- Almost935
- · Replies 3 ·
Spring constant based on change in potential energy
- sanctifyd83
- · Replies 12 ·
Spring Connected between 2 Masses
- MD_Programmer
- · Replies 8 ·
Where is the electric field zero?
- CatWhisperer
- · Replies 4 ·
Radians vs Degrees: Explaining to Cooper
- Coop
- · Replies 5 ·
Motion of Object: Velocity & Acceleration Direction
- Lily Lauren
- · Replies 1 ·
Two Conducting Spheres connected by a wire
- tomizzo
- · Replies 6 ·
Physics 2, Three Infinite Straight Wires
- nathancurtis11
- · Replies 1 ·
Electromagnetic Induction Problem
- paytona
- · Replies 2 ·
How High Should a Street Lamp Be for Optimal Road Illumination?
- skrat
- · Replies 1 ·
Solving a Head-on Collision: Qs 1-4
- Jimmy87
- · Replies 5 ·
Thermodynamics problem - weight and piston connected by string
- Saitama
- · Replies 31 ·
How Does a Charged Bead Behave in a Capacitor?
- Peetah
- · Replies 4 ·
Finding the terminal voltage across 16V and 8V batteries?
- fishy
- · Replies 1 ·
Magnitude of acceleration given the orbit
- Shadow236
- · Replies 2 ·
Calculating Water Vapor Requirements for Temperature Change of a System
- Attis
- · Replies 12 ·
What Differentiates Simple Harmonic Motion from ψ = Amod(t) cos (wavt)?
- whitehorsey
- · Replies 3 ·
How to Calculate the Required Force to Move a Block Up an Incline
- Almost935
- · Replies 2 ·
Chain and spinning disk problem
- Rugile
- · Replies 22 ·
Distance & Speed: How Many Times Can a Bee Fly?
- nowayn
- · Replies 9 ·
Finding electrical energy used by a light
- owtu
- · Replies 8 ·
Kinetic energy of rocket explosion
- jc14
- · Replies 1 ·
Trying to solve complex equation with 1 variable,
- QuantumX
- · Replies 13 ·
Gas Expansion and Compression: Solving for Volume and Pressure Changes
- Ronaldo95163
- · Replies 9 ·
Sliding block with motion restricted by spring
- itsalana
- · Replies 2 ·
How Do You Determine the Correct Phase Constant for a Wave?
- grassstrip1
- · Replies 3 ·
Semi-infinite string with a mass on the free end
- raving_lunatic
- · Replies 1 ·
How Long Does a Projectile Stay in Air When Launched Vertically at 10 m/s?
- GoGoGadget
- · Replies 4 ·
Temperature at junction of gold and silver bars?
- Feodalherren
- · Replies 4 ·
Capacitor and reactance question
- kkingkong
- · Replies 1 ·
Trouble with question - Catching a baseball & momentum
- CougarPride
- · Replies 1 ·
Two methods for finding spring constant k
- Jay_
- · Replies 11 ·
Conservation of Energy: No Translational KE?
- nomorenomore
- · Replies 2 ·
Finding velocity as a function of position, constant acceleration
- crowned
- · Replies 11 ·
How to Show the E Field Outside a Long, Charged Conducting Cylinder?
- Plaetean
- · Replies 5 ·
Electrodynamics question - Induced EMF
- mrmoriarty
- · Replies 12 ·
Why is the Normal Force Neglected in Certain Scenarios?
- nomorenomore
- · Replies 1 ·
Change in temperature in the Gay-Loussac-Joule experiment
- Emspak
- · Replies 5 ·
Understanding Oscilloscopes: How Can We Use Them to Measure RC Circuits?
- tbdm
- · Replies 4 ·
Is Conservation of Energy Demonstrated in Particle Motion from A to P?
- Dumbledore211
- · Replies 4 ·
Kinematics - particle acceleration and distance travelled
- GoGoGadget
- · Replies 2 ·
Voltage of cylinder of radius R
- TwinCamGTS
- · Replies 6 ·
Ball attached to string attached to wall, find force against wall
- melizabeth
- · Replies 5 ·
Electric field of a non uniform charge of a cylinder
- TwinCamGTS
- · Replies 6 ·
Kinematics help - object is dropped from a height h
- GoGoGadget
- · Replies 1 ·
Why Does Helicopter Velocity Affect Package Drop Time?
- rexorsist
- · Replies 4 ·
Understanding Vector Addition and Magnitude Equality
- yoyo16
- · Replies 12 ·
Neutral conductor has a hollow cavity within it
- TwinCamGTS
- · Replies 1 ·
Deriving entropy change equation from Boltzmann's principle
- tombrown9g2
- · Replies 6 ·
Solve Falling Chain (3.11) Length & Speed
- Radarithm
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Centripetal Force String Tension
- scrambledeggs
- · Replies 5 ·
Find energy of a lightning strike
- sfgoat
- · Replies 2 ·
What is the force direction on a left wire in a parallel current setup?
- ivanwho49
- · Replies 4 ·
The energy of debris ejected from an asteroid impact
- QuantumX
- · Replies 9 ·
Charge Distribution on Metal Sheet
- Saitama
- · Replies 64 ·
Solving Equations of Motion for Speed Traps, Sleds & Snakes
- deltangh
- · Replies 4 ·
Understanding Simple Kinematics: Graphing Speed and Distance Traveled
- liamporter1702
- · Replies 9 ·
Acceleration of a block with static & kinetic friction
- ammcl30
- · Replies 4 ·
Thrust and acceleration of a launch vehicle
- coggo8
- · Replies 20 ·
Particle's path in magnetic field
- ivanwho49
- · Replies 8 ·
Calculate Currents Through Ideal Batteries with Kirchhoff's Loop Rule
- subzero0137
- · Replies 5 ·
Effective Resistance Across Concentric Circuit
- ItsImpulse
- · Replies 13 ·
How Do You Calculate the Equivalent Resistance in an Infinite Resistor Network?
- Saitama
- · Replies 4 ·