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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Which Car Was Going Faster Before the Collision?
- Jason03
- · Replies 14 ·
Projectile Motion with Basketball
- wolves5
- · Replies 1 ·
How Do Climbers Use Physics to Rappel Down Cliffs?
- BlueDevil14
- · Replies 8 ·
Superposition of Pulses Behavior
- zorro
- · Replies 5 ·
What is the resultant speed and resultant angle of the boat?
- physicsgurl12
- · Replies 6 ·
Some Simple Cosmology Questions
- EEWannabe
- · Replies 4 ·
Special Relativity: just wanted a second opinion
- Shark 774
- · Replies 8 ·
How do you find angular velocity experimentally?
- jjellybean320
- · Replies 2 ·
Ideal Gas Question Please do help I'm befuddled
- arsey1009
- · Replies 2 ·
Compton Wavelength, h and h bar
- Badger01
- · Replies 1 ·
Question about gases and kinetic theory
- Badrakhandama
- · Replies 1 ·
Doing Work When You Carry Something Up Stairs
- yuhs
- · Replies 2 ·
What is the inverse of 466ft^2/gal?
- jactre
- · Replies 3 ·
How Do You Calculate Takeoff Speed and Fall Time in Physics Problems?
- ama
- · Replies 3 ·
Energy/rotational mechanics question
- nehcrow
- · Replies 4 ·
How Does Strong Axis Bending Affect Stress in Composite Beams?
- steve321
- · Replies 3 ·
Thermodynamics of an elastic band
- bon
- · Replies 3 ·
Thermal Expansion, Young's Modulus
- pat666
- · Replies 5 ·
Finite Well Potential - Unbound eigenfunction
- quanticism
- · Replies 1 ·
Special Relativity Length Expansion?
- gnulinger
- · Replies 1 ·
Mass pushed upward a hill, calculate the coefficient of friction.
- b_andries
- · Replies 9 ·
How do I know what the internal resistance of a battery is in a diagram?
- chiddler
- · Replies 1 ·
Physics:series of 3 lenses calculate mag
- ally.hady
- · Replies 4 ·
How Does Mass Affect Friction in a Pulley System?
- ArticMage
- · Replies 1 ·
Thermal physics; specific heat capacity
- saccapella
- · Replies 10 ·
Find Equilibrium Temp. of Copper & Water Mixture
- biamin
- · Replies 5 ·
Body Heat and Energy Conversion During Running: Fact or Fiction?
- Peter G.
- · Replies 2 ·
Coulomb Law and Vectors - How do you find a scalar answer from the vector form?
- bmarson123
- · Replies 1 ·
Help understanding statically determinate/indeterminate structures
- steve321
- · Replies 3 ·
In order to float, how much water must ship displace?
- teggenspiller
- · Replies 1 ·
Are the Peaks and Troughs of a Wave Always the Same Size?
- Bashyboy
- · Replies 4 ·
Pressure=force/area - cannot arrive at correct answer?
- teggenspiller
- · Replies 3 ·
Do not know how to projectile velocity at given time.
- karateman1
- · Replies 9 ·
Cardboard boomerang experiments and calculations
- jjellybean320
- · Replies 6 ·
Is my relative motion analysis correct for this engineering problem?
- Precursor
- · Replies 1 ·
The velocity and acceleration of particle give position vector
- jake241190
- · Replies 1 ·
6 part 2 loop RLC circuit complex impedance
- froldy
- · Replies 6 ·
Conversion of hydrogen atom wave function that I don't understand
- adh2
- · Replies 2 ·
Kinetic Energy of 840 Kg Roller Coaster Trolley
- x3lifelove
- · Replies 2 ·
Confusion about frequency and resonance of tuning forks?
- Kratos321
- · Replies 1 ·
Original activity from total counts, short decay
- dirks555
- · Replies 1 ·
Solving Blocks & Pulley Homework: Find Acceleration
- Krappy
- · Replies 6 ·
Calculate Plane Velocity Relative to Ground in Different Directions
- Quantum Mind
- · Replies 2 ·
Displacement Meter- Simple Harmonic Motion
- dvep
- · Replies 8 ·
Dynamics - determining an angle
- Femme_physics
- · Replies 5 ·
Finding the equation for Velocity with Drag
- Theorγ
- · Replies 13 ·
Solve Lens Equations: Object 8cm @ 80cm, Focal Length 25cm
- loopsnhoops
- · Replies 1 ·
Merry-go-round at rest, inertia, kid running on it problem.
- 1barcafan
- · Replies 1 ·
How Many Bright Fringes Appear on the Screen in a Diffraction Experiment?
- bigsaucy
- · Replies 7 ·
Dynamics circular and linear motion
- Femme_physics
- · Replies 22 ·
Projectile Motion-acceleration/velocity
- TBE
- · Replies 8 ·
Can a Single Photon Carry All the Momentum in Electron-Positron Annihilation?
- melonhead
- · Replies 4 ·
Work/energy/kinematics rocket ship problem
- 1barcafan
- · Replies 1 ·
Position vs time graph that relates to a constant non-zero acceleration?
- gibson101
- · Replies 8 ·
Sample Calculation on Milikan's Data Analysis
- realslow
- · Replies 5 ·
Can metal be placed in Microwave? Why or why not?
- seashell3130
- · Replies 2 ·
How to calculate angle given coefficent of friction
- Eats Dirt
- · Replies 3 ·
Calculating the Height of Keystone's Ski Lift
- phun4kay
- · Replies 1 ·
Projectile Motion fired at an angle
- srabi001
- · Replies 2 ·
What is the equation for my graph and how can I use Eulers formula to help me?
- karlis123
- · Replies 2 ·
Angle of Electron Velocity Change: 8 Degrees
- Resmo112
- · Replies 1 ·
Thermal expansion across a copper rod
- dabess
- · Replies 1 ·
How Does a Dielectric Wedge Affect Capacitor Performance?
- arnno
- · Replies 10 ·
Proving Direct Proportion of \frac{1}{x}-\frac{1}{y} with \frac{1}{x}
- Reshma
- · Replies 19 ·
Is Conservation of Energy or Charge Correct in Superconducting Digital Circuits?
- SeriousNoob
- · Replies 4 ·
Radioactive decay and half life?
- kraphysics
- · Replies 2 ·
Big doubt about movement and friction
- MFDonadeli
- · Replies 7 ·
Current flow through no resistance conductor
- flyerpower
- · Replies 2 ·
Build a Homopolar Motor in 1 Week - Magnet & Screw Tips
- Qube
- · Replies 1 ·
The Zeeman Effect: Determining Atomic Level Quantum Numbers
- bon
- · Replies 1 ·
What is the Impedance of a Plane Wave Passing Through a Metal?
- bayners123
- · Replies 2 ·
Showing that S^2 and Sz Commute with the System Hamiltonian
- bon
- · Replies 1 ·
Resultant Intensity of Water-waves
- HSTay
- · Replies 1 ·
Calculating Force Needed to Lift a Rock with a Crowbar
- fiosuer
- · Replies 4 ·
Distance travelled during acceleration
- stupidlawyer
- · Replies 10 ·
What Is the Minimum Speed Needed for a Whirling Ball to Taut a String?
- Callen9
- · Replies 2 ·
Physics question on dynamics (Newton's law of motion)
- fterh
- · Replies 22 ·
Gravitational potential, highest point, and final velocity
- x3lifelove
- · Replies 5 ·
How to find displacement of 400m track
- Rbraind
- · Replies 3 ·
False: Internal Energy of A & B is Not Determined by T Alone
- sparkle123
- · Replies 1 ·
Help understanding the basics of surface tension?
- nitroblu
- · Replies 1 ·
Ball in the air conceptual question.
- Sentience
- · Replies 5 ·
Measuring acceleration of gravity
- tronter
- · Replies 8 ·
Final vertical velocity? (kinematic formulas)
- gibson101
- · Replies 23 ·
Inelastic Collision Using Distance to Figure Velocity
- Luudy
- · Replies 2 ·
Kinematics equation problem. (two stones dropped from different heights)
- Sentience
- · Replies 8 ·
Mass of a particle in magnetic field
- sonic52260
- · Replies 4 ·
An Electrostatics Problem - Eletric Field
- Yukimi
- · Replies 7 ·
Angular Velocity of a wind turbine
- neoncrazy101
- · Replies 3 ·
Why Is a Turbine More Efficient in Winter?
- Peter G.
- · Replies 3 ·
Calculating Uncertainty in Angular Resolution for Scientists
- P-Jay1
- · Replies 5 ·
Calculating Magnetic Flux Density for Zeeman Splitting 0.05 /cm
- bon
- · Replies 1 ·
Proton accelerated thru potential difference - find final speed
- AladdinSane
- · Replies 5 ·
Solving Bacterial Motor Angular Speed and Time for One Revolution
- neoncrazy101
- · Replies 5 ·
Calculate Reaction Forces at B & D: Beam Bending Homework
- dvep
- · Replies 5 ·
Calculating Energy Received by Ear
- FeDeX_LaTeX
- · Replies 1 ·
The rays of my ray diagram are not lining up
- jeremy5561
- · Replies 2 ·
How refrigerators and air conditioners work
- ProPM
- · Replies 4 ·
How Do Transformers Affect Voltage, Current, and Light Bulb Brightness?
- IanT
- · Replies 12 ·
Please help me question on the game theory, thanks
- coldway
- · Replies 5 ·