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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Calculating Heat Flow Ratio of Two Water Tanks
- 5carola5
- · Replies 7 ·
How much charge would the Earth and Sun need to knock the Earth out of orbit
- g.lemaitre
- · Replies 5 ·
Simple Question to do with TORQUE on a helicopter
- 06mangro
- · Replies 7 ·
Velocity, displacement and position time graph help
- alicia113
- · Replies 2 ·
Tension between 3 blocks of equal mass
- Justinmcg67
- · Replies 4 ·
Which atoms have lower binding energies than iron?
- zabachi
- · Replies 2 ·
Finding resistor's voltage with current and voltage sources present
- JJBladester
- · Replies 5 ·
Why Did My Calculation of Driving Speed Result in an Error?
- Manodesi524
- · Replies 4 ·
Conceptual Question on Parallel Plate Capacitors
- waters
- · Replies 3 ·
Calculating Rotational Energy of a System with Three Masses and an Impulse
- LindaNguyen
- · Replies 7 ·
Work Energy Method for Rotational Motion
- freshbox
- · Replies 6 ·
Helicopters (Coursework) anyone got any recommendations?
- 06mangro
- · Replies 2 ·
Downhill to uphill roller coaster velocities on a bike
- ErikMM
- · Replies 1 ·
Kinetic Friction Problem Needs Help
- Drstevebrule
- · Replies 4 ·
How to draw a phasor addition on AC circuit?
- maali5
- · Replies 1 ·
Operational Amplifier Output Voltage with Equal Resistors
- Femme_physics
- · Replies 13 ·
Can Gauss' Law Help Find Charge on a Sphere?
- box543
- · Replies 1 ·
Electric field of an infinite sheet of charge.
- SayWhat1
- · Replies 12 ·
Kinematics - Acceleration equation confustion
- help1please
- · Replies 7 ·
Calculating Time of Impact of Pendulum Bob on Cylindrical Bar
- grzz
- · Replies 2 ·
Misunderstanding in converting atomic weight to kg (s.state physics)?
- naftali
- · Replies 7 ·
RLC Circuit: Calculating Current I(ω)
- VictorWutang
- · Replies 5 ·
Why 10V Between Every Point in Circuit Diagram?
- goomer
- · Replies 4 ·
Linear charge density (what equation?)
- box543
- · Replies 3 ·
Maximum Height for Hanging Mass on a Stretched Wire
- Catchfire
- · Replies 9 ·
Oscillations in an electric field
- evangoor
- · Replies 1 ·
Physics, Net force and Acceleration
- vrack
- · Replies 1 ·
Work Energy Method for Rotational Motion
- freshbox
- · Replies 22 ·
What Is the Specific Heat Capacity of the Liquid in This Thermodynamics Problem?
- dobedobedo
- · Replies 3 ·
Solving Block B's Stop Time: A 1-lb Ball & 10-lb Block
- danyalasdf
- · Replies 3 ·
How to Round Answers with Significant Figures for Weights in Physics
- fojkehelky
- · Replies 7 ·
Introductory rotational dynamics/energy conservation question
- kinslow31
- · Replies 4 ·
Heat transfer in a cylindrical tube
- 5carola5
- · Replies 2 ·
Magnitude of the charge on the oil drop
- bphy
- · Replies 1 ·
Resistivity of conducting putty?
- Navras
- · Replies 1 ·
Photoelectric Effect - Variables
- Pinchy444
- · Replies 4 ·
Optimizing Force for Pushing Wheel over Bump
- PrestonBlake
- · Replies 8 ·
Sound intensity, given frequencies
- Radian
- · Replies 1 ·
Height And Width of Reflected Pulses (through less dense medium) ?
- Ted1508
- · Replies 1 ·
Energy in 10 m of Cable: Calculating Voltage Storage
- Winzer
- · Replies 6 ·
Projectile Motion: Initial Speed and Maximum Height Calculations
- john stewart
- · Replies 4 ·
Magnitude and direction of velocity
- john stewart
- · Replies 2 ·
Finding the voltage in a non- series/parallel circuit
- JJBladester
- · Replies 6 ·
Two Conceptual questions about rotational mechanics
- babayevdavid
- · Replies 1 ·
Derivation of area of trajectory of projectile
- Quantum Mind
- · Replies 5 ·
Velocity,average velicity,distance
- john stewart
- · Replies 3 ·
Resolving Multiloop Circuit Configurations with Delta Star Transformation
- nanotubez
- · Replies 5 ·
Solve Work & Angle Homework: Plane Towing Glider & Water Skier
- songoku
- · Replies 3 ·
Why are different equations giving me different answers?
- Bananahammock
- · Replies 2 ·
Velocity changes when force applied perpendicular
- asmnath
- · Replies 1 ·
How to Solve an Increasing RC Circuit with Changing Resistance and Capacitance?
- T.smriti
- · Replies 2 ·
Weight of system: water container and rock
- physickkksss
- · Replies 4 ·
How to Decide Centripetal Forces
- kuikaili
- · Replies 5 ·
Force on charge and electric field question
- XodoX
- · Replies 3 ·
Impulse-steel ball dropped on steel slab
- herbally
- · Replies 4 ·
How can an object be pulled upward with an acceleration less than gravity?
- Bashyboy
- · Replies 2 ·
What is the length of the primitive cell for sodium with a BCC structure?
- fluidistic
- · Replies 24 ·
Formula for average current on a coil inside a solenoid
- starthorn
- · Replies 2 ·
Red Shift and Receding Galaxies
- Peter G.
- · Replies 3 ·
How Does Doubling the Current Affect the Compass Needle's Deflection Angle?
- IIK*JII
- · Replies 1 ·
I to find the distance of the freefalling objects when one hits the ground.
- Purpplehaze
- · Replies 16 ·
Velocity of two insulating charged spheres at collision
- intemk9
- · Replies 3 ·
Physics Question on Motion: Object Acceleration and Distance in Uniform Motion
- einstein101
- · Replies 10 ·
Having a hard time solving equation for mass of planet
- lancel916
- · Replies 8 ·
Calculate lens diameter using NA
- Lanc1988
- · Replies 1 ·
Electric field question involving 4 charges on a square
- joshjohns
- · Replies 6 ·
Non Uniform Acceleration as a function of distance and not time
- ayloedxa
- · Replies 27 ·
What is the total binding energy in MeV/c2 for N-14?
- hattrick72
- · Replies 2 ·
A tree and a mirror on the ground
- sklotz
- · Replies 2 ·
How Does Inductance Affect a DC Circuit?
- smell5
- · Replies 10 ·
Calculating Power from Mass, Speed and Height - 250W
- roovid
- · Replies 10 ·
Algebra Help for Bernoulli's Equation
- NRasmus1
- · Replies 4 ·
Diverging lens problem? finding focal length
- snash1057
- · Replies 5 ·
Having trouble figuring center of mass between Sun and Jupiter
- lancel916
- · Replies 6 ·
How Do You Calculate Torque and Angular Momentum in a Conical Pendulum?
- carl87
- · Replies 4 ·
What is the conservation of energy problem involving h and v?
- Karhitect
- · Replies 4 ·
Basic electric circuits concept help required
- goomer
- · Replies 5 ·
Need help figuring out this problem
- Karhitect
- · Replies 14 ·
Explanation of how the following calculus work
- maali5
- · Replies 6 ·
Rearranging period of pendulum equation to find length
- Adam17
- · Replies 3 ·
Potential difference between two large plate changing with time
- AGNuke
- · Replies 2 ·
Need help finding velocity of spring launched object
- Adam17
- · Replies 11 ·
Voltage across a bulb affects power output
- gracep
- · Replies 2 ·
Calculating Minimum Distance of Approach for Charged Particles
- AGNuke
- · Replies 2 ·
Determining final temperature, pressure and work done
- nombusoz
- · Replies 4 ·
Speed of sound in water at 16 degrees celsius
- lavster
- · Replies 1 ·
Gravitational Potential Energy homework
- freshbox
- · Replies 26 ·
Highschool Question on Thermal Equilibrium
- chris1
- · Replies 3 ·
Lenses - magnification, position, focal length help
- alicia113
- · Replies 14 ·
Help Finding velocity of an object in circular motion at an angle.
- Adam17
- · Replies 6 ·
Work needed to move a point charge
- TrpnBils
- · Replies 1 ·
Internal Energy of an Isovolumetric Process
- Astrogirl93
- · Replies 4 ·
What is the Motion of a Bifilar Pendulum?
- joelKID984
- · Replies 4 ·
Help finding the magnitude of the applied force
- ssh222
- · Replies 3 ·
Bomb explodes at rest, conservation of motion problem
- T531
- · Replies 2 ·
Calculate the magnitude of the net force
- ninaw21
- · Replies 2 ·
Inverse relationship between radius and resistance
- Navras
- · Replies 3 ·
Box on an incline with friction, min and max forces involved
- smsport
- · Replies 4 ·
Determining Dipole Rotation: Clockwise vs Counterclockwise
- nishantve1
- · Replies 1 ·