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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Resistors: Series/Parallel Current/Voltage Rules
- spock9000
- · Replies 1 ·
Relationship Between Kinetic Friction and Mechanical Energy
- velouria131
- · Replies 6 ·
Entropy change when two gas streams mix
- roam
- · Replies 9 ·
Calculating Amperes for converging electrical pathway
- Obama
- · Replies 7 ·
Energy stored in an inductor of an LR circuit
- OmegaFury
- · Replies 2 ·
When does the sum of two sinusoidal waves satisfy the wave equation?
- DeIdeal
- · Replies 1 ·
How Does Resistivity Affect Copper Wire Resistance and Current Flow?
- Snape1830
- · Replies 1 ·
Net magnetic field caused by current from two wires
- mm2424
- · Replies 3 ·
Relativistic dynamics-collision problem
- ladybeetle
- · Replies 2 ·
Efficiency Calculation for Mechanical System with Incomplete Information
- TyErd
- · Replies 6 ·
Heat radiated from within a shell
- sparkle123
- · Replies 2 ·
Show that if vv' = 0 (both vectors) then speed v is constant
- Keshroom
- · Replies 18 ·
Fluid Mechanics and SHM of spring
- nago
- · Replies 5 ·
Harmonic Potential of Non-Interacting Particles
- Lyons_63
- · Replies 1 ·
Efficence - Calculate the Force needed to life this load
- I-need-help
- · Replies 1 ·
Work-Energy Theorem question with not much detail to work with
- tbyrne
- · Replies 18 ·
Newton Law's of motion question
- Saitama
- · Replies 5 ·
Current carrying wire in uniform magnetic field; where is net magnetic field 0?
- mm2424
- · Replies 1 ·
Resistance of DC Motor Experiment
- bluey107
- · Replies 2 ·
A bullet strikes a block like boom boom pow
- Mdhiggenz
- · Replies 11 ·
The classic momentum transfer between balls question
- original
- · Replies 1 ·
Circular rotational motion (kinematics)
- dunn
- · Replies 3 ·
Finding acceleration on an elliptical path
- TyErd
- · Replies 36 ·
Particle moving in a one-dimensional potential
- Identify
- · Replies 8 ·
Find power when resistor, capacitor, and inductor are connected in a series
- jamiewilliams
- · Replies 1 ·
Change in charge on C2 when capacitor switch opens
- bob92
- · Replies 8 ·
Calculating Speed of a Charged Particle in Electromagnetism
- spock9000
- · Replies 7 ·
UCM - Derive speed, of a body moving, radius r, and the frequency f.
- MohammadG
- · Replies 1 ·
What Does 92.5 m/s Represent in the Equation (V2-V1)^2?
- TheronSimon
- · Replies 9 ·
Spring system: Relationship b/t mass and distance object travels
- sweetpete28
- · Replies 1 ·
What Is the Maximum Mass That Keeps Truss Forces Within Limits?
- JJRKnights
- · Replies 4 ·
Ball Acceleration and Trajectory Question
- hueyosie
- · Replies 2 ·
Concervation of Momentum: Bullet and Block of Mass
- sweetpete28
- · Replies 2 ·
What Is the Kinetic Energy of the Bigger Mass After an Explosion?
- Victorzaroni
- · Replies 4 ·
Shortest length of closed pipe that resonates with a 512 Hz tuning fork
- Exhausted
- · Replies 2 ·
Use the Sin Law to find angle C
- TheronSimon
- · Replies 4 ·
How Long Is the Wave Packet from a Radar Transmitter?
- lockedup
- · Replies 4 ·
Advanced Rotational Velocity Question
- Victorzaroni
- · Replies 3 ·
What Are the Final Angle and Force in an Elastic Collision with a Wall?
- bfusco
- · Replies 6 ·
Calculating Work and Force of Air Resistance on a Falling Pinecone
- shaggyace
- · Replies 2 ·
Magnetic Field of a Moving Point charge
- OmegaFury
- · Replies 2 ·
Finding speed from force-vs-position graph
- shaggyace
- · Replies 2 ·
Determine equation given 3 points and 2 lines
- euro94
- · Replies 1 ·
How to Model Aircraft Landing Gear Vibrations?
- pige
- · Replies 1 ·
Percentage uncertainty and percentage difference
- koat
- · Replies 1 ·
How Does a Bullet's Initial Speed Relate to Energy Conservation in a Collision?
- bfusco
- · Replies 8 ·
1 pulley, 2 masses, 2 inclines
- TheronSimon
- · Replies 3 ·
Thermodynamics : Heat transfer question.
- AlchemistK
- · Replies 1 ·
Calculating rms speed of hydrogen molecules
- amw2829
- · Replies 7 ·
Lever Formula: F*a=Q*b or Q*a=F*b?
- -Physician
- · Replies 5 ·
Ceramic ball falling and bouncing with halving coefficient of restitution
- corpuzdawn
- · Replies 1 ·
Why Is the Direction of Friction on Block A to the Right?
- theBEAST
- · Replies 9 ·
Work with varying forces. Work energy theory
- EEintraining
- · Replies 7 ·
Induced Emf in a Rectangular Coil
- member 217843
- · Replies 2 ·
Momentum and movement basic GCSE Quest
- nonthesecond
- · Replies 10 ·
Which pulley system requires the least force to lift the same weight?
- zizodev
- · Replies 2 ·
How much rotational kinetic energy does the disk have ?
- IntegrateMe
- · Replies 2 ·
Bullet-Block Collision: Solving for Initial Speed and Energy Dissipation
- bfusco
- · Replies 2 ·
Elevator falling on spring question
- tal444
- · Replies 19 ·
Special Relativity - Relativistic Dynamics
- Jonmundsson
- · Replies 1 ·
Why does rotational kinetic energy use the radius in this problem?
- pyroknife
- · Replies 1 ·
Work-energy theorem problems with swings and ax blades
- NguyenAdam
- · Replies 3 ·
Determining Work Based on a Charge and Particle
- rabiddogma
- · Replies 4 ·
Variable Resistror, Calculating Vo
- Jreyes613
- · Replies 13 ·
Maximum Compression of Spring in Spring Loaded Collision
- moonbase
- · Replies 5 ·
Cross Product application problem
- Asheram0
- · Replies 4 ·
Two colliding spaceships in Special Relativity
- shyguy79
- · Replies 6 ·
Impact force from 60-foot ski cliff jump into powder
- a_skier
- · Replies 7 ·
Energy Threshold for 2 proton -> 2 proton 1 Pion
- Goatsenator
- · Replies 7 ·
Calculating gear ratio for vertical climb
- Ortix
- · Replies 1 ·
Measuring specific heat capacity
- Janinever
- · Replies 8 ·
Finding the moment of inertia of a uniform square lamina
- kingkong69
- · Replies 6 ·
Reflected wave equation for rigid wall vs free end
- emailanmol
- · Replies 2 ·
Electric field of a cylindrical capacitor
- Eigenvaluable
- · Replies 1 ·
Would a water-filled ball or air-filled ball hit the ground first?
- zizodev
- · Replies 2 ·
If bar A moves right at a speed of x,how does bar B move?
- zizodev
- · Replies 3 ·
Refractive index and depth of object in water.
- heartOFphysic
- · Replies 8 ·
I am very lost with my physics homework.
- becca0402
- · Replies 1 ·
Angular velocity and acceleration of a rotating 4 kg object
- John78
- · Replies 3 ·
What is the Magnetic Vector Potential for a Given Magnetic Field?
- beth92
- · Replies 1 ·
Center of Mass boat distance from shore what am I doing wrong?
- sweetpete28
- · Replies 1 ·
Finding x(t) from a time dependant force
- Keshroom
- · Replies 12 ·
Mechanical apptitude to suggest the direction of action.
- zizodev
- · Replies 10 ·
Momentum: Nucleus decays into 3
- sweetpete28
- · Replies 4 ·
Quantum Mechanics Particle moving in 1-D potential
- 20930997
- · Replies 4 ·
2-body central force ( gravity ) problem
- jobendorfer
- · Replies 6 ·
Relating hanging washer weight to stopper tension in rotating string system
- Klymene15
- · Replies 4 ·
Direction of current flow in a circuit
- theBEAST
- · Replies 6 ·
Scale Hanging From Ceiling of Elevator Question
- hueyosie
- · Replies 3 ·
Where is the magnetic field zero between two antiparallel current-carrying wires
- nerdy_hottie
- · Replies 3 ·
What is the direction of acceleration for the block moving on the xy plane?
- MissEuropa
- · Replies 8 ·
Girl on merry-go-round throws rock tangentially
- ranjaxt2012
- · Replies 1 ·
Hooke's law when bungee jumping
- gravythis
- · Replies 5 ·
Derivation of kintetic theory equation
- leibo
- · Replies 3 ·
Calculating Friction and Tension in a Pulley System
- wow22
- · Replies 7 ·
Tension and speed in a carnival swing ride, and chamber radius
- tbtheqt
- · Replies 1 ·
Got a few questions stumping me
- 40856
- · Replies 1 ·
I get two different answers. Which one is correct?
- carloz
- · Replies 3 ·
Two boxes connected to a string over an ideal pulley?
- algar32
- · Replies 5 ·
Dynamics - packages on an incline
- pleasehelpme6
- · Replies 9 ·