Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Finding the angle between 2 vectors
  • PinkFlamingo
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Coulomb's law and different charges
  • PinkFlamingo
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2
Is the Density of Gas Always 1.29 kg/m³ in Harmonic Sound Wave Calculations?
  • cseet
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1
How to Solve a Particle Motion Problem with Increasing Resistance?
  • mcintyre_ie
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14
How Many Water Changes to Achieve Required Ammonium Sulfate Concentration?
  • Jikx
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1
Energy of Photon: Hydrogen n=4 to n=3 Transition
  • UrbanXrisis
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9
Work and Energy Problems [help]
  • krypt0nite
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5
Kinematics: Solving Problems with Displacement, Velocity, and Acceleration
  • PhysicsBeginner
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4
What is the Acceleration of an Electron in a Constant Electric Field?
  • 3.14159265358979
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4
How Do Impulse and Momentum Affect the Motion of Colliding Ice Skaters?
  • loatisaf
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3
Can anyone tell me how I can calculate uncertainty?
  • repugno
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3
Calculate % of Carbon Decay in Ancient Organic Material | Physics Problem 18"
  • mustang
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3
How Much Weight Can a Hot Air Balloon Lift Given Specific Conditions?
  • dubsinpubs
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2
How Do You Calculate Kinetic Friction Force in a Sliding Object Problem?
  • redshift
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6
How does temperature affect the speed of gas molecules?
  • exequor
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4
How Is Acceleration Determined When a Weight Is Suspended on a String?
  • redshift
  • · Replies 8 ·
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8
Solving for Coordinates at 35 Degree Angle: Derivative & Next Steps
  • Arienne
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2
Tension in String One of 5 kg Mass at 45 Degree Angle
  • UrbanXrisis
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6
Triangular loop in magnetic field
  • Juntao
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5
10th Grade IGCSE Mathematics HELP
  • RBS_5
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3
LOADS of Final Review Questions
  • physicszman
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4
Your help is needed on this question lil to hard for me
  • travishillier
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3
How Can the Quadratic Formula Help Solve Real-World Problems?
  • travishillier
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3
Could Somebody help me please? EMF in parallel
  • Drakon25th
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6
Bode Diagrams for Transfer Function: (s+2)/(s*(s+10)*(s^2+2s+2))
  • UnteljentEnginyr
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2
Calculating Center of Mass of a Hollow Nose Cone
  • mase5151
  • · Replies 4 ·
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4
Momentum Transfer in 1.00kg Steel Ball Collision
  • LD_90
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2
What are the physics and circuitry behind smart bombs?
  • Rudy_51
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2
Solve Calculus Problems: Limits and Gradients Explained | Algebra II Tips
  • Sombra
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3
How Can I Understand Logarithms and Their Graphs Better?
  • baltimores_finest
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3
How Can You Transform Ring into Bell by Changing One Letter at a Time?
  • travishillier
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2
What Kind of Help Do You Need?
  • cronxeh
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2
Solve Skydiver Problem: Find Range of Times & Height After T1 Seconds
  • Nightspeed
  • · Replies 6 ·
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6
Probability question: random variables
  • jezse
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2
Maximizing TNT Production from Toluene: A Chemical Problem Solved
  • ignorant1
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2
How Can Impulse Be Converted to Energy in Rocket Flight Calculations?
  • SamB
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2
Solving a Half-Life Physics Problem: Estimating Radon-222 Atom Decay in 12 Days
  • mustang
  • · Replies 2 ·
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2
Solving Exercise: Finding Velocity Vector of Cyclist
  • Azeri
  • · Replies 9 ·
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9
How Do You Sketch and Analyze the Graph of k(x) = x^4 - 64x^2?
  • mustang
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5
Solve for X and Find P(-2) | Helpful Homework Solutions
  • Sope0nARope
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3
Solving Elliptical Orbit Problems for Space Dynamics Exam
  • retupmoc
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4
Can a Ball Climb Hill B? Potential & Kinetic Energy Explained
  • indebluez
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3
How Is Arc Length in Polar Coordinates Used in Real Life?
  • o0123456543210o
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2
Why does the acceleration graph look like a /\\ when a ball is dropped?
  • indebluez
  • · Replies 14 ·
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14
Specific Latent Heat of Ice HELP
  • xxpsychoxx
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3
Is Pair Production and Annihilation the Same Process?
  • EIRE2003
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2
Rotation and power problem, help
  • Cyannaca
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5
Calculating the Inductance of a Toroidal Solenoid
  • Cockroach
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4
Lens Refraction Problems: Help with Calculating Image Distance and Magnification
  • moonlit
  • · Replies 4 ·
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4
Velocities of balls after 2D collision
  • UrbanXrisis
  • · Replies 5 ·
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5
Is The Elegant Universe a Bridge Between Quantum Physics and Relativity?
  • Imparcticle
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Help with another momentum question
  • wikidrox
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2
Before I attempt this next problem on sliding blocks
  • redshift
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3
How can I calculate the work done by weight on a crate sliding down an incline?
  • kdinser
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Infinitely annoying square well
  • gnome
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2
How is Electric Potential Determined from Infinity?
  • Antepolleo
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6
What is the Electrical Potential Between Two Point Charges?
  • becca
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4
Find change in resistance for mercury-tube breathing monitor
  • JJaX
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1
Weights on a string problem - is this right?
  • redshift
  • · Replies 16 ·
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16
Question how to solve car problem
  • jaye21
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2
Solve Time Rate of Change of Mechanical Energy for Damped, Undriven Oscillator
  • Soilwork
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2
Help with Fortran: Reading/Sorting a List of Integers
  • falcon0311
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4
Solving String Wave Frequency: 6m in 0.5s
  • cseet
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2
Reducing Wave Speed by Half: Understanding the Equation and Its Components
  • cseet
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3
Is the Antiderivative of 1/x Actually ln(x)?
  • chemical
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Troubleshooting Refraction: Common Mistakes in Solving Physics Problems
  • moonlit
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8
How Do You Sketch a Traveling Wave at Different Time Intervals?
  • stawbeegirl
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3
How to Determine the Force on a Wire Frame in a Magnetic Field?
  • edge
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2
Solve Reflection Equation: Find Height of Shortest Mirror for Viewing Full Image
  • moonlit
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2
Locating Object & Image with a Converging Lens
  • eku_girl83
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2
What Is the Closest Object That Can Be Seen Clearly with Swapped Glasses?
  • RicXeoR
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2
What is the Difference Between 'To Like' and 'To Please' in Spanish?
  • Imparcticle
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5
Pressure on a submarine window problem
  • jamdr
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4
Why is a magnet broken in half still as magnetic as the original?
  • holly
  • · Replies 7 ·
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7
Thermodynamics/Gas Law questions
  • Carbonoid
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2
Calculate Final Kinetic Energy of 2.0 kg Object | 30N & 15N
  • wikidrox
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I really - angular speed and speed at equilibrium position
  • BananaRed
  • · Replies 7 ·
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What physics principles are involved in the operation of a turbocharger?
  • Darken
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3
Work Function of Silver: Solve Problem 18 for eV
  • mustang
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2
Question for anyone who can help me please
  • jen043081
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2
Finding Real Zeros of Polynomial Functions Using Derivatives
  • mustang
  • · Replies 7 ·
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7
What is the annual rate of increase for a gallon of milk?
  • mustang
  • · Replies 3 ·
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3
What is the speed of light in a universe with altered physical constants?
  • athenaroa
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2
Can I Prove Perpendicular Acceleration Using d(v^2)/dt = 0?
  • LD_90
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A Mover Pushes a Piano Up a Ramp: Work Done?
  • bbg5000
  • · Replies 3 ·
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Help with Gravitation questions
  • wikidrox
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2
What is fluorescence and how does it arise?
  • retupmoc
  • · Replies 2 ·
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2
Need help with diffraction problem by tonight
  • eku_girl83
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2
How Do You Calculate Net Force and Impulse in Physics Problems?
  • wikidrox
  • · Replies 11 ·
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Calculate Index of Refraction: Air to Glass
  • cowgiljl
  • · Replies 2 ·
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2
Can someone check my Physics working?
  • cseet
  • · Replies 2 ·
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2
What Formulas Determine the Sliding and Toppling Forces on a Cube?
  • jimmy p
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2
How Is the Electric Field Calculated Outside a Cylindrical Conductor?
  • jreinier
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Solve Polynomial Problems: Problem 5 & 24
  • mustang
  • · Replies 3 ·
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3
The inverse of a set of points?
  • thinice
  • · Replies 4 ·
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4
Why Convex Mirrors are Used in Late Model Cars
  • cowgiljl
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2
Model rocket (velocity and time equation help please)
  • Duke77
  • · Replies 2 ·
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2
Light rays through a window pane
  • cowgiljl
  • · Replies 2 ·
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2
Proving the Mass Difference in Our Solar System's Sun and Planet P's Sun
  • exequor
  • · Replies 6 ·
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6
Calculating the Decay Constant of Carbon 14
  • EIRE2003
  • · Replies 6 ·
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6