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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Why Does Current Density Point Downwards in a Magnetic Field?
- loba333
- · Replies 1 ·
Finding angular velocity of a spinning sphere with given kinetic energy fraction
- blackbyron
- · Replies 3 ·
What is the Specific Heat Capacity of Copper in Water?
- ChromoZoneX
- · Replies 5 ·
Lunar lander in orbit around the moon and how much work the thrusters do
- kerbyjonsonjr
- · Replies 13 ·
Angular and tangential acceleration
- Idividebyzero
- · Replies 4 ·
How Fast Can a Child Swing Without Breaking the Rope?
- ELE55AR
- · Replies 1 ·
Inelastic collision and circular motion
- seanpk92
- · Replies 4 ·
Work and Kinetic Energy Problem
- physicsbooks
- · Replies 2 ·
How Do You Calculate the Velocity of a Swinging Mass?
- tcg
- · Replies 3 ·
Blackbody Radiation: 100K to 1000K Energy Increase
- CaneAA
- · Replies 3 ·
How Do You Solve an Oscillating Rope Problem?
- tigers4
- · Replies 3 ·
Electric field in a ring between two magnets
- critter
- · Replies 1 ·
Electric force with a moving conductive bar in a magnetic field
- slain4ever
- · Replies 3 ·
Why is Neutrality Important in Electrostatics of Conductors with Cavities?
- vibhu_baronia
- · Replies 2 ·
Solenoid magnetic flux and emf
- xzibition8612
- · Replies 1 ·
What Is the Recoil Speed of Earth After a Meteorite Collision?
- Idividebyzero
- · Replies 5 ·
Young's interference experiment problem
- downwithsocks
- · Replies 2 ·
Is delta H=0 for isothermal process?
- sachin123
- · Replies 4 ·
A Flexible chain between two hooks (statics)
- pegasus24
- · Replies 2 ·
Projectile motion of tennis ball
- kisha
- · Replies 7 ·
Nonconsevative force ramp problem
- duckyboy
- · Replies 1 ·
Gravitational torque about a point on a rod
- cdbowman42
- · Replies 1 ·
Electromagnetic induction, right-hand rule, and transformers
- mrkan
- · Replies 1 ·
Finding moment of inertia about x, y, and z axes for a particle
- elsternj
- · Replies 7 ·
How to calculate dampening coefficient?
- donkeycopter
- · Replies 1 ·
How to find object distance from magnification and focal length
- tre.benjamin
- · Replies 1 ·
Conservation of Angular momentum question.
- greg_jones20
- · Replies 1 ·
Block sliding down rough wedge on frictionless surface
- dorkymichelle
- · Replies 1 ·
Elastic Collision and Kinematic Problem
- 22flakes
- · Replies 2 ·
Calculating Impulse and Momentum in a Colliding Cart System
- dorkymichelle
- · Replies 1 ·
Electrons, wire, amps and magnetic fields?
- heston1980
- · Replies 5 ·
Uniform Electric Fields concept question
- lookingforhlp
- · Replies 2 ·
Last moment of inertia problem I have
- elsternj
- · Replies 1 ·
Unanswered Questions: The Consequences of Neglecting Scientific Inquiry
- creedreaper
- · Replies 1 ·
How Does Friction Impact Tug of War Dynamics?
- novawinters
- · Replies 1 ·
Two blocks pushed apart by spring: find velocity of 8kg block
- Idividebyzero
- · Replies 2 ·
Computing the commutator [p̂ₓ, Ĥ]
- blueyellow
- · Replies 3 ·
When do two pulses begin to meet?
- tigers4
- · Replies 2 ·
Deflection and Modulus of Elasticity
- karmatic
- · Replies 3 ·
What Refraction Index Makes an Object Appear at Infinity in a Crystal Sphere?
- Emilia
- · Replies 1 ·
Calculating Shear Force for a Linearly Increasing Load on a Rod
- Patdon10
- · Replies 10 ·
Electron deflection angle in a TV tube deflection system
- crosbykins
- · Replies 1 ·
Extremely Difficult Circuit Problem involving a potentiometer
- lilcho
- · Replies 8 ·
Vertical Spring Oscillation Frequency
- jzwiep
- · Replies 17 ·
Calculating Projectile Motion for a Catapult with Limited Data
- thedarklite
- · Replies 7 ·
Calculating the Angle of an Electron Passing Between Charged Plates
- crosbykins
- · Replies 1 ·
A-Level physics past papers and answers online ?
- GUS
- · Replies 1 ·
Is the answer to this expression 2 or 128?
- kaleidoscope
- · Replies 2 ·
Double Slit Experiment - Measurement Problem
- Spherical Cow
- · Replies 3 ·
Where to place a third charge for electrostatic equilibrium
- jle1092
- · Replies 1 ·
Batteries: voltages when in series, parallel, and combination?
- jle1092
- · Replies 1 ·
Finding angle between two forces given resultant angle and magnitudes
- AlchemistK
- · Replies 10 ·
Convert Magnetic Field [MMaxwells*N] to Gauss
- Robbi
- · Replies 1 ·
Solving Power of Projectile with Air Resistance
- oghenez
- · Replies 4 ·
Calculating Charges Using Coulomb's Law and Slope Analysis
- dba
- · Replies 1 ·
EKG graph feature in first cardiac cycle vs 2nd and 3rd
- MitsuShai
- · Replies 2 ·
What is the maximum water speed from a compressed watergun?
- PFCJeff
- · Replies 1 ·
What's wrong with this Spring Energy question?
- cadenmoore
- · Replies 1 ·
Calculating the Rate of Nuclear Fission with 1000 kW Power and 200 MeV Energy
- intellpuneet
- · Replies 3 ·
Finding Surface area of a Parametric Curve
- trap
- · Replies 7 ·
Force needed to support 464 lb weight with lever and piston system
- yang09
- · Replies 3 ·
Interesting dimensional analysis question posed about time perception
- cogandil
- · Replies 1 ·
Acceleration of a metal rod in an electric circuit
- BARBARlAN
- · Replies 1 ·
How Does a Canister's Speed Change Along a Frictionless Incline?
- Gold3nlily
- · Replies 5 ·
How Do You Calculate the Mass of an Isotope?
- enternaL
- · Replies 10 ·
Induced magnetic flux through a coil
- Gnarlywhale
- · Replies 2 ·
Basic Lenz's Law question, loop near current carrying wire
- neener
- · Replies 1 ·
How Many Interference Maxima Appear Within the Central Diffraction Peak?
- akmphy
- · Replies 1 ·
Thin Film Interference Patterns
- jegues
- · Replies 3 ·
Calcuating the resistance of a circuit.
- neener
- · Replies 12 ·
500 ohm resister fed from 120 VP-Pac source
- stevielee
- · Replies 3 ·
Finding four currents in a three-loop circuit with Kirchhoff's laws
- lilcho
- · Replies 14 ·
Calculating Moment of Inertia for a System of Small Blocks on a Clamped Rod
- elsternj
- · Replies 3 ·
Electric Field and Energy Storage of 9V Battery Across Parallel Plates
- physicskid8
- · Replies 1 ·
What is the current equation and approach for problem-solving?
- BARBARlAN
- · Replies 1 ·
Charge and Voltage ProblemDon't know where to start
- JoshP-hillips
- · Replies 1 ·
What limits current in a motor with low-resistance windings?
- HeyHow!
- · Replies 2 ·
How Does the Biot-Savart Law Apply to Forces Between Wire Segments in a Loop?
- Scarlitt14
- · Replies 6 ·
Equivalence of two sine arguments
- acherentia
- · Replies 2 ·
Angular acceleration of a computer disk drive
- elsternj
- · Replies 3 ·
Magnetic field at origin because of 3 wires
- irishbob
- · Replies 4 ·
Probabilities Inside Cubic 3D Infinite Well
- erok81
- · Replies 3 ·
Max Distance Calculated for Spring Mass System of K=450N/m, m=2.2kg
- samdiah
- · Replies 2 ·
What does the Rayleigh criterion have to do with star colors and lens diameter?
- jegues
- · Replies 2 ·
Why use constant acceleration equations for non-constant throwing motion
- OneTimePad
- · Replies 2 ·
How Do You Calculate the Center of Mass for a Composite Shape?
- kerbyjonsonjr
- · Replies 2 ·
Vertical intercept of an Acceleration Force Graph
- AnomalyCoder
- · Replies 2 ·
How Does Special Relativity Affect Exam Time and Signal Transmission?
- Lavabug
- · Replies 6 ·
Grade 11 musical instrument project
- ta4294
- · Replies 5 ·
What Determines the Number of Real Roots in a Quadratic Equation?
- Hyzon
- · Replies 3 ·
Compound Microscope Homework: Angular Magnification & Object Distance
- dvolpe
- · Replies 9 ·
Why Are Most Pieces of Iron Not Magnetic?
- blufor79
- · Replies 3 ·
Ranking paths by average velocity from position-time graphs
- Lorek
- · Replies 2 ·
Why do large particles scatter more light than smaller particles?
- thewall12
- · Replies 1 ·
How Does Doubling Time Affect Specific Heat Capacity in Thermal Physics?
- Doubell
- · Replies 5 ·
Theoretical problem (no calculations) with electric field from moving charge
- solarboy
- · Replies 1 ·
Heat dissipated from electric field
- capandbells
- · Replies 3 ·
Work done by force (Vector notation)
- Gold3nlily
- · Replies 6 ·
Magnetic Field and vectors from Two Wires
- cse63146
- · Replies 9 ·
Moving electrons and magnetic fields
- heston1980
- · Replies 2 ·