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.
Determine the total charge needed to apply to the electroscope.
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Approximate the strong force between two protons.
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Electromagnetic Waves Questions
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Understanding Virtual Images in Lenses and Mirrors
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Reversible heat pump - Work input?
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What is the value of θ when the error in sinθ ≈ θ is approximately 5%?
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Adding a capacitor in series question
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Can the acceleration of the proton be negative for this situation?
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How Do You Calculate Uncertainty in the Volume of a Cookie?
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Temperature and pressure in a laboratory
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Three Phase PV Grid-Tied System(MPPT)
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How to Determine the Units of a Homogeneous Equation in Physics
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How Do You Calculate the Electric Field of a Ring?
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What Determines the Escape Speed from Earth's Gravitational Pull?
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Why Does Integration Differ Between Electric Fields of a Disk and a Line Charge?
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Solving Kirchhoff's Laws: I1, I2, I3
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How Do You Calculate Object-to-Image Distance in Lens Systems?
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But, as a webpage title: Wave Problem: Solving for Phase Shift
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How to calc the force needed to change direction of a moving object?
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What Is the Proper Length of Spaceship 2 in Its Rest Frame?
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Percent uncertainty in Volume of a beach ball?
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Solving Ball Bearing Problem: Tower Height & Impact Velocity
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Why is the Induced Current Clockwise in this GRE Problem?
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HEY YOU Double Doppler/Radar Guns/Equation Derivation
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Finding Applied Force from Coefficient of Friciton and mass
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Projectile motion, find speed/time of football kick
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Troubleshooting a Velocity vs. Time Graph: Position at t=10
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Special Relativity GRE question (Where is my method flawed?)
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John Taylor Classical Mechanics Chapter 1 Problem 46
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John Taylor Classical Mechanics Chapter 1 Problem 22
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How Do You Calculate Projectile Motion for a Cannonball?
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Thermodynamics- rms translational kinetic energy
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Boat heading and relative velocity
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Three hanging balls of uniformly distributed charge
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Where Is the Electric Field Zero Between Two Negative Charges?
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Tricky problem - Find E-field of a sheet of charge
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Small clarification: applying Coulomb's Law
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Intro physics proportion question
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Predicting Final Velocities for a Head-On Elastic Collision Problem
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Density of holes on a sprinkler for uniform water distribution
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Kinematics question - Rocket launch
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Capacitance, Charge and Voltage (P.D.)
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Kinematics question - An automobile accelerating and braking
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Calculating Flux Linkage in a Rotating Rectangular Coil
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Physics free-body diagram problem?
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Which of the Following is false?
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Find Current I3 in Circuit - Homework Statement
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How Do You Solve the Motion of Two Colliding Pendulums?
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Puck on a sphere, energy & Newton's 2nd
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Moment inertia - theoretical problem
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Equivalent Circuits: How Do (a) & (b) Compare?
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Voltage Divider: Solving for V in Series Circuits
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Equivalent resistance of a cube of resistors
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E&M Problem - 2 Charged Masses Hanging on Strings
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What is the 1/e Lifetime of a Graph?
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Circumference of Earth With Eratosthenes
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Time to Mars (orbit around Sun given perihelion and aphelion)
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How Do You Calculate the Time Period in a Spring-Block SHM System?
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Magnitude of Force of two point charges on a third (electrostatics)
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Having problems understanding units
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Mechanics - inclined plane with friction and finding max M
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Oppositely Charged Parallel Plates
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Calculating Reaction Force on a Stationary Wall in a Rotating System
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How Many Strides on a Moving Sidewalk?
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Thermodynamics First Law Problem
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Fluids question: U Shaped Tube.
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Calculating Orbital Radius for Geosynchronous Satellite Using Kepler's Third Law
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What Are the Average Forces and Friction in These Motion Problems?
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Maximum potential given a charge
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Separable PDE for electric field in a cavity
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Solve for position given force in a mass-spring system?
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How High Was the Tree from Which the Squirrel Fell?
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Friction Acceleration: Solving for Coefficient and Force Angle
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Finding centripetal acceleration and velocity
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Leap Off an Asteroid: Escape Earthly Gravity?
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Momentum Investigation: Car collision
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Circular Motion Problem 2: Help with Solving | Physics Forum
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Solving Circular Motion Problems | Book Answer Included
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Can Work, Power, and Energy be Solved Together?
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Solving a Force Problem: Tips and Tricks for Finding the Correct Answer
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Solving a Rotation Mechanics Problem: Option D vs Attempted Solution
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What is the Solution to a Confusing Circular Motion Problem?
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Find Maximum Separation of Points A & B with 4000N Tension in Ropes
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Calculating Force on Quarter Cylinder Dam Gate with Hinge and Stopper
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Electric Field Calculation for Infinitely Long Charged Line and Rod
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What is the Correct Solution to a Work, Power, and Energy Problem?
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Is a Paint Document Reliable for Answer Verification?
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Finding out maximum from given velocity?
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Electric Field with a Solid Spherical Conductor
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Weight vs Mass On Moon and Mars Imperial Units
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Basic Engineering Mechanics (trigonometry)
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Parallel and perpendicular part of a vector
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Evaluating Temperature v time graph
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Find the average and uncertainty?
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Electric Field of a Conducting Sphere
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How Thick Should a Plastic Plate Be for Maximum Microwave Reflection?
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Calculating Acceleration and Error for a Ball Rolling Down an Inclined Plane
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Calculating Falling Objects: GPE, KE and Speed
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Controlling fluid Flow under pressure?
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Arrangement of circuit affecting resistance measured
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