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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Building a half-mile long photogate and fighting diffraction
- Madysepanganahi
- · Replies 3 ·
Does amplitude depend on mass in SHM?
- Mark Zhu
- · Replies 1 ·
Find the average force at distance x
- TachyonLord
- · Replies 22 ·
Conservation of Energy and Angular Momentum in a Rotating Train-Disk System
- JD_PM
- · Replies 30 ·
Car and SUV meeting on a North-South highway
- Tyrannosaurus_
- · Replies 5 ·
Equivalent resistance between points A and D with 1 ohm resistors
- agoogler
- · Replies 7 ·
Extract anomalies from two-line element set (TLE) on ISS
- fab13
- · Replies 1 ·
Angular momentum conservation and center of mass
- Eitan Levy
- · Replies 1 ·
How do the charges in 3 cancel each other out in net electrostatic force?
- Salman Ali
- · Replies 6 ·
How Do Forces Influence the Shape of Water and Mercury Drops on Glass?
- pranjal verma
- · Replies 6 ·
Surface charge on a conductor due to a charged rod 'q'
- iVenky
- · Replies 1 ·
Two masses on an inclined plane without friction
- RiotRick
- · Replies 7 ·
Dependence of Coulomb's law on the medium
- Krushnaraj Pandya
- · Replies 8 ·
Calculate the acceleration of each mass at the instant the thread snaps
- Josielle Abdilla
- · Replies 9 ·
Repulsive force between 2 protons?
- Nerdydude101
- · Replies 6 ·
Transition energy estimation based on bond length
- hanhjung99
- · Replies 4 ·
What Does 'Mutual Potential Energy' Refer to in a Hydrogen Atom?
- Erik 05
- · Replies 6 ·
How Does an Ideal Fluid's Velocity Change When Hitting a Vertical Board?
- Istvan01
- · Replies 17 ·
What is the speed of each particle?
- OierL
- · Replies 6 ·
Ball on elastic cord hits cart with sloped sides
- octu
- · Replies 24 ·
Magnetic field from radial current in an iron disk
- Magnetosphere
- · Replies 112 ·
What Happens to the Current Through R1 When E2 is Short Circuited?
- subhradeep mahata
- · Replies 6 ·
Finding maximum spring compression with conservation of energy
- Physics_Boi
- · Replies 10 ·
Is it possible to apply energy conservation here?
- navneet9431
- · Replies 12 ·
Induction Motor Auto-Transformer Starter - Power and Torque
- Stu80
- · Replies 10 ·
Explaination of Solid-Liquid and Solid-gas surface tension
- pranjal verma
- · Replies 5 ·
Comparing air speed through moving and stationary windmills
- Kamran_110
- · Replies 4 ·
Calculate the density at the centre of the Sun
- artworkmonkey
- · Replies 2 ·
Calculating the Weight of a Moving Object Using Momentum and Force
- Eitan Levy
- · Replies 24 ·
Apparent wavelength in Doppler's effect
- Krushnaraj Pandya
- · Replies 7 ·
Collision with a ball spinning about its vertical axis
- Mmarzipan
- · Replies 9 ·
Electric Power - Which formula to use and when?
- MeAndMyLucidLife
- · Replies 6 ·
A problem regarding the lens formula
- jxocq
- · Replies 13 ·
Ideal Gas Law and Pressure at 80°C
- SakuRERE
- · Replies 2 ·
Why can't I subtract electric fields from opposite charges directly?
- Himanshu Singh
- · Replies 4 ·
Derivation: force on magnetic moment in magnetic field
- robinegberts
- · Replies 3 ·
Finding the orbital period of a second planet using Kepler's third law
- OierL
- · Replies 2 ·
Minimum deceleration to prevent a collision
- Jenny Physics
- · Replies 33 ·
Direction of friction in yo-yo where applied force is at top
- issacnewton
- · Replies 8 ·
Work Done by Man in Going Up Against the Motion of an Escalator
- sarthak sharma
- · Replies 27 ·
Rolling motion of Cylinders and Plank on a Slope
- Kingster426
- · Replies 8 ·
Ball in semicircular groove: collision type for energy and momentum equations
- Cc518
- · Replies 6 ·
What is the Velocity of a Rotating Weight?
- stackptr
- · Replies 5 ·
How to Calculate Energy Produced from Collision of Particles?
- 1missing
- · Replies 6 ·
Hockey puck on table with hanging mass in circular motion
- Myani
- · Replies 5 ·
Gravitation and orbits homework problem
- Physics_Boi
- · Replies 31 ·
Flag pole finding horizontal force component at hinge.
- Parker Hays
- · Replies 1 ·
Induced current along equator of conducting sphere in varying magnetic field?
- Clara Chung
- · Replies 3 ·
How Many Balloons Can Be Inflated from a Helium Cylinder?
- relatively-uncertain
- · Replies 16 ·
Amplitude of a mass joined to a spring in the presence of an E-field
- Shivang kohlii
- · Replies 5 ·
What Is the Average Power of Bullets Bouncing Off Superman?
- Taylan
- · Replies 26 ·
Mass falling to a scale from a funnel
- Eitan Levy
- · Replies 14 ·
Meaning of a phrase in a kinematics problem
- Fabrizio Vassallo
- · Replies 6 ·
Hohmann transfer ellipse to Mars orbit from LEO
- Raphael30
- · Replies 6 ·
Solving for final temp of adiabatic ideal air expansion
- takeachance
- · Replies 12 ·
Are theses approaches correct? (entropy change of water turning into steam)
- EastWindBreaks
- · Replies 9 ·
Force in a magnetic field on a moving coil
- subhradeep mahata
- · Replies 5 ·
Motion on a rough inclined plane
- Taylan
- · Replies 5 ·
Relativistic momentum of two photons from a decay
- zehkari
- · Replies 4 ·
Calculating the wavelength of a surface wave after impact
- LordOfCinders
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Thermal efficiency of the engine in a PV diagram
- YC_128
- · Replies 2 ·
Electric field of a non-conducting sphere
- TishBass
- · Replies 3 ·
Moment of inertia of two rods (T shape)
- IanAlpace
- · Replies 2 ·
Relativistic Dynamics Problem - Reference Frames
- Lost1ne
- · Replies 4 ·
Zeeman effect: find gas velocity from Fe I spectral lines
- artworkmonkey
- · Replies 8 ·
Determining Work Done by a Person on a Luggage
- SerenaMay
- · Replies 2 ·
Year1 Mechanics (angular momentum)
- AlanWWW
- · Replies 9 ·
How Fast Was the Car Moving in the Radar Speed Trap Experiment?
- C F
- · Replies 8 ·
Skier hitting snowdrift: distance and force
- Stitch1775
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Does work have the same impact on entropy change as heat?
- Est120
- · Replies 2 ·
How Does the Ideal Gas Law Apply in Multi-Part Physics Problems?
- barryj
- · Replies 14 ·
Calculating τ by knowing I is proportional to A^2
- Cc518
- · Replies 8 ·
Velocity of a falling folded rope and reaction force
- Raphael30
- · Replies 10 ·
Thermal Expansion of a Wire Connected To a Rod
- person123
- · Replies 6 ·
How to Determine Velocity at Gear Center Using Point C?
- WhiteWolf98
- · Replies 5 ·
Are Fresnel boundary conditions continuous for EM waves at an interface?
- Apashanka
- · Replies 18 ·
Problems calculating the New Moment of Inertia
- KMconcordia
- · Replies 9 ·
Three Charges Aligned on a Straight Wire
- Thundies22
- · Replies 2 ·
Calculating Angular Velocity and Tensions After a Ball Hits a Board at an Angle
- Raphael30
- · Replies 6 ·
Average force during a ball's elastic bounce off of a plate
- Apashanka
- · Replies 11 ·
Magnetic induction at surface of 50A copper wire
- subhradeep mahata
- · Replies 5 ·
Error Calculation for a Diffraction Grating's Performance
- zehkari
- · Replies 6 ·
Calculating the magnitude of an electric field
- Haddon
- · Replies 10 ·
Moment of inertia of two bars at right angle using Steiner's theorem
- SchroedingersLion
- · Replies 11 ·
Magnetic field at a point due to a line of charge
- vysero
- · Replies 7 ·
Finding input energy for a running athlete with 85% efficiency
- harujina
- · Replies 6 ·
What happens to the current in a loop when a magnet approaches
- Selene0001
- · Replies 6 ·
Achieving Record Distances in the Hammer Throw
- mr1709
- · Replies 1 ·
Finding the Wavefunction for Tunneling,with tunnel lenght L
- Arman777
- · Replies 6 ·
Minimum period for a particle moving around an ellipse with velocity constraints
- Jenny Physics
- · Replies 15 ·
Banked Road Physics Problem: Maximum Speed Calculation
- mr1709
- · Replies 5 ·
Calculating the final velocity of a simple electric train
- Himanshu Singh
- · Replies 49 ·
Reference frames and Galilean transformation
- Taylor_1989
- · Replies 10 ·
Tension force and acceleration Problem
- chef99
- · Replies 1 ·
How Do You Calculate Charge Density in a Uniform Sphere?
- TishBass
- · Replies 1 ·
Velocity of image in plane mirror
- subhradeep mahata
- · Replies 5 ·
Fill an empty bottle with R-134a
- stoky
- · Replies 1 ·
LRC Series Circuit Critical Damping
- rugerts
- · Replies 5 ·
What Torque Is Required to Raise a Water Bucket from a Well?
- OierL
- · Replies 5 ·
What Is the Blood Pressure in the Head When Standing?
- axer
- · Replies 1 ·