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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Proving the dor product of 4-vectors is Lorentz invariant
- chipotleaway
- · Replies 7 ·
Gravitational force exerted by Jupiter on a baby
- tchls1
- · Replies 3 ·
1-D Quantum Mechanics Conceptual Problem
- Yosty22
- · Replies 1 ·
Node-voltage method to find current
- zealeth
- · Replies 7 ·
Reversible Clapeyron cycle efficiency
- garyd
- · Replies 1 ·
Rayleigh Criterion or Resolving Power?
- Sastronaut
- · Replies 1 ·
How Do You Calculate the Landing Point of a Projectile Thrown from a Height?
- Darth Frodo
- · Replies 2 ·
Mesh Current Analysis with Dependent Voltage Source
- grekin
- · Replies 3 ·
Ball thrown upward to height h, lands on roof at h/2 after 10s
- tophat
- · Replies 3 ·
Derive length contraction formula given a two system experiment.
- oddjobmj
- · Replies 11 ·
How Do You Convert Acceleration from m/s^2 to km/h^2?
- Henrybar
- · Replies 3 ·
Car Coasting Down a Circular Hill: Which Free-Body Diagram is Correct?
- BrownBoi7
- · Replies 9 ·
Projectile being launched off a table at an angle?
- megmar95
- · Replies 3 ·
How Does Human Luminosity Compare to Skin Surface Area?
- Sastronaut
- · Replies 3 ·
How Do You Calculate Moments in Complex Physics Problems?
- yugeci
- · Replies 9 ·
Double slit interference: why use 1/4 of the intensity diagram?
- cathy
- · Replies 10 ·
Power dissipated in circuit: What is the total power dissipated in this circuit?
- zealeth
- · Replies 2 ·
How Do You Calculate the Impact Force in a Two-Car Collision?
- get_physical
- · Replies 7 ·
Pascual Jordan - The Forgotten QFT Physicist?
- Larry Gopnik
- · Replies 7 ·
How Is Enthalpy Change Calculated for Heated Argon at Constant Volume?
- sitting_duck
- · Replies 7 ·
Regarding r and sign convention for Position vectors for moments
- 7Lions
- · Replies 7 ·
Temperature at the tip of a fin
- theBEAST
- · Replies 1 ·
Push out solenoid force-distance problem
- MadaraUchiha
- · Replies 1 ·
Equivalent Circuit: Re-Draw OK?
- princejan7
- · Replies 4 ·
What is the Binding Energy of Carbon 12?
- Typhon4ever
- · Replies 6 ·
Why do positive and negative charges repel each other?
- xtrubambinoxpr
- · Replies 6 ·
Three hanging masses and two pulleys, why does m3 accelerate?
- goraemon
- · Replies 4 ·
The ideal gas law for an adiabatic process
- garyd
- · Replies 5 ·
How to Use Nodal Analysis to Find Voltages in a Circuit?
- grekin
- · Replies 5 ·
Electric Field due to a charged line; With y as function of theta
- Molderish
- · Replies 3 ·
Power dissipated and current of a battery in a particular circuit
- PullingOutHair
- · Replies 7 ·
Finding Projectile Motion range at an angle?
- Kavorka
- · Replies 3 ·
Standing waves on a fixed string
- BOAS
- · Replies 3 ·
Calculate Probability of Decay Using Decay Constant ##\lambda##
- Saitama
- · Replies 11 ·
What Is the Stretch of a Cable Under Load?
- verisimilitude
- · Replies 2 ·
Current and voltage across wires of different materials in series
- bbuilder
- · Replies 4 ·
How do I calculate mass of pulley and force of friction on AtwoodMach.
- francisco300
- · Replies 1 ·
Rubber ball colliding with steel ball of equal mass
- goraemon
- · Replies 3 ·
Impulse and maximum height of a particle
- thaalescosta
- · Replies 3 ·
Graph and Questions: Solve Motion of 500.0 g Cart
- BrownBoi7
- · Replies 5 ·
Momentum question involving two objects of varying mass
- goraemon
- · Replies 3 ·
How Does an Object Behave on a 30° Slope After an Initial Upward Force?
- bjarnidk
- · Replies 2 ·
Simplification of a Force and couple system Wrench Problem
- 7Lions
- · Replies 1 ·
Conservation of Mechanical Energy and Kinetic Friction
- martepartay
- · Replies 3 ·
Kinematics problem - Bullet in block of wood
- paytona
- · Replies 6 ·
Wave Function Sketch for Particle at Rest with Given Potential and Energy
- allenh98
- · Replies 1 ·
Nuclear Excitation: Find Energy of Incoming Photon
- stumpoman
- · Replies 5 ·
Uniform circular motion and angular momentum?
- PhyIsOhSoHard
- · Replies 13 ·
Should the 3A Current Source Be Included in KCL Equations for Nodes a and c?
- princejan7
- · Replies 5 ·
Can a Mass Attached to a Spring Move in a Magnetic Field with Electric Current?
- Bananas40
- · Replies 1 ·
What Are the Conservation Laws in a Pendulum Collision Problem?
- Hanuda
- · Replies 11 ·
Finding acceleration, velocity, and motion map from a parabolic position vs time graph
- BrownBoi7
- · Replies 5 ·
How to Determine the Minimum Heat Extraction from a Furnace?
- gfd43tg
- · Replies 3 ·
University physics - conducting concentric spheres
- SunSmellsLoud
- · Replies 3 ·
Black body radiation, Plancks' Law question?
- applestrudle
- · Replies 1 ·
How Does Mercury Movement Affect Pressure in a U-Shaped Tube?
- Emspak
- · Replies 8 ·
What is the difference between Vrrm and Vrm
- yugeci
- · Replies 2 ·
Serway 9th ed - sliding friction and problem
- GreyNoise
- · Replies 10 ·
Calculating the Distance Between Two Bubbles in Contact
- transparent
- · Replies 13 ·
Solving Fluid Dynamics Pressure at Different Speeds
- narutoish
- · Replies 2 ·
Net force on a charge in a square
- paytona
- · Replies 10 ·
Simple Combination Circuit, Find Current
- blue_lilly
- · Replies 6 ·
University physics, waves, multiple choice.
- thinktoohard
- · Replies 2 ·
Reaction force on a submersible well pump
- aladinlamp
- · Replies 1 ·
Why doesn't my result yield 9.8 m/s^2?
- Henrybar
- · Replies 2 ·
How Do You Calculate Friction and Energy Loss on a Slope?
- bjarnidk
- · Replies 4 ·
How far can an 80 kg person walk on a 10 m steel beam before it tips?
- Attis
- · Replies 44 ·
Calculating Max Height of Water Squirted from Garden Hose
- narutoish
- · Replies 1 ·
Standard deviation is wrong whatever I do?
- santoki
- · Replies 10 ·
Energy conservation - maximun height and equilibrium height
- david1111
- · Replies 12 ·
When to use conservation of momentum or energy in charged particle problems?
- downtime91
- · Replies 3 ·
Calculating ball velocity and angle in pinball simulation with gravity
- gutti
- · Replies 1 ·
How Do Coupled Pendulums Behave When Connected by a Spring?
- ggilvar99
- · Replies 6 ·
Calculating Spring Compression for Stone Sliding Down Hill
- s.dyseman
- · Replies 2 ·
Force on Electron Due to Two Charged Objects in an Electric Field
- blue_lilly
- · Replies 4 ·
How Does River Flow Impact Boat Speed Calculations?
- BrownBoi7
- · Replies 3 ·
Accounting for momentum in a collision
- mstachowsky
- · Replies 18 ·
Projectile launched horizontally from height R
- david1111
- · Replies 5 ·
Potential Difference problem with sphere and capacitor
- MAC5494
- · Replies 6 ·
What factors affect the heat transfer coefficient?
- theBEAST
- · Replies 3 ·
Measuring Voltage Across Two Points In A Series Circuit
- declan.B
- · Replies 7 ·
Calculating Tension for a Box on a Horizontal Surface with Friction
- fixedglare
- · Replies 9 ·
What is the relationship between ramp height and final velocity of a marble?
- 16Candles
- · Replies 1 ·
Find the trajectory of a boat that moves in a river
- david22
- · Replies 1 ·
Magnitude of the current flowing around the nucleus in the Bohr mode
- munkhuu94
- · Replies 3 ·
How do I find the speed of this train?
- jesseeeeee
- · Replies 1 ·
Work done lifting a book to 1.25 m then carrying it 8.0 m horizontally
- fixedglare
- · Replies 1 ·
Find charge and radius of conducting spheres given voltage and electr
- g-racer
- · Replies 8 ·
Beam supported by three chains at equilibrium
- PhyIsOhSoHard
- · Replies 6 ·
Power difference when calculated from Force and Energy
- AGNuke
- · Replies 8 ·
Deriving expressions for total capacitance
- BOAS
- · Replies 1 ·
Calculating the Magnitude of the force
- kkingkong
- · Replies 3 ·
How Do You Calculate Equilibrium for a Rod Subjected to Multiple Forces?
- piisexactly3
- · Replies 2 ·
Is My Comparator Circuit Textbook Explanation Incorrect?
- Jimmy87
- · Replies 2 ·
Attenuation finding distace and amplitude
- Nettes
- · Replies 25 ·
Dynamics of circular motion. Particle on the top of a circle
- Zipi Damn
- · Replies 2 ·
Circular motion question - finding rpm
- jgray
- · Replies 8 ·
Can a Monkey Outsmart Physics to Reach the Bananas?
- Glemming
- · Replies 21 ·
Energy/power A levels physics
- yan_plusheartz
- · Replies 5 ·
Young's modulus calculation giving negative power
- yan_plusheartz
- · Replies 8 ·