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.
(somewhat complex inclined plane problem) why is this wrong?
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Uncovering Wavelengths Not Reflected in a Soap Bubble Film
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Calculating Combined Mass of Archer & Bow w/ Conservation of Momentum
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The net force on the charge placed at origin
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Why would his weight be zero at the moment of the fall?
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Parameters of final image formed by lens system
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Mesh current equation in matrix form
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Doppler effect in different scenarios
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Over what frequency range are Maxwell's equations valid?
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Phase shift of light incident on 2 slits
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Current in a solenoid (conceptual)
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Tension on a string attached to two objects
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How to calculate the size of a star with just temperature
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A simple static equilibrium problem
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What Was the Initial Velocity of the Second Car in the Collision?
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Golfing on North Pole (equation of motion)
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Glider and vertical circle question
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How Do You Convert Atmospheric Pressure from Atm to PSI at High Altitudes?
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Question about E-Fields and Potential of a Coaxial Cylinder
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Projectile motion: find distance a ball would land
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Defintion of Neutron activation and moderation
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Wave, finding the velocity of the incoming car.
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Formula relating thickness of pipe to fundamental frequency
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Force at Pipe Bend Outlet A: 0.0707(12cos120 - 12)
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Momentum, vector addition question
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Firework Height Calculation: 712m, 23.6°C, Timer
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Thermal Physics Expansion Coefficient Problem
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How Do Shell and Liquid Forces Achieve Equilibrium in a Hemispherical Container?
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How does increasing the tension of a string affect various properties?
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Fluid mechanics - Pascal's principle
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Significant figure round off when adding and subtracting
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Power, Torque, and Velocity in a Pulley System
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Assess the statements: about potential and kinetic energy
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What Is the Minimum Velocity Factor for a Lunar Orbit?
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Calculate falling distance when object is already in motion
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Nuclear shell model, spin and parity predictions
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Circuit settles to steady state and switch is opened
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What is the Direction of Resultant Force on a Stationary Vane Caused by Water?
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Which Container Retains More Heat After 30 Seconds?
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What Went Wrong with Calculating Spring Force in This Physics Problem?
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Beat Frequency of 2 Waves in Free Space
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Mean temperature of winding when current falls
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Is the direction of resultant force to the left in this problem?
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Deriving an equation for water flowing from a tap
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Simple Harmonic Motion and Energy Problem
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Easy Simple Harmonic Motion Problem
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Archived Electromagnetics field question
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Archived Can You Solve This Two-Body Dynamics Problem?
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Archived Weighted least-squares fit error propagation
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Why Does the Solution Use FH(6) Instead of FH(10) for Gate Force Calculation?
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What is the work that he does on his body?
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How to determine what vector A is equal to?
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Reading the graph: find distances travelled
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What is the charge on the outer surface of the middle conductor?
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Acceleration, Velocity and Position
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Biot-Savart's Law for cylindrical conductor
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Value of a wave at a time with a phase shift.
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Normal Modes and Normal Frequencies
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Are R3, R1, R2, and the capacitor in parallel?
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What is the total kinetic energy of the rod?
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2 masses, friction and a spring
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Find current induced in the photoelectric effect
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Entropy Calc: Solving for 100 Mol Gas
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Gauss's Law Problem: long, cylindrical charge distribution
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How Does Ohm's Law Apply to Parallel Circuits?
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Alpha decay ##Q##-value, recoil energy, momentum
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The force when the distance is reduced
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Beta decay, electron capture Q value
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What is the Maximum Speed Needed to Avoid a Collision?
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Pressure-volume graph and internal energy
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Can Water Flow in Multiple Directions in a Network of Pipes?
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Signal to noise ratio in a CT scanner
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Equilibrium and Force on Lower Hemisphere
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Are My Gravitational Force and Field Calculations Correct?
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How Does Biot-Savart Law Calculate Magnetic Field at Point P?
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Find Electron Current Through Iron Wire
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SHM Q&A: Find Period given Max Speed & Acceleration
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Friction factor at turbulent region
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Confused with the energy equation in thermodynamics
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Find the initial velocity of a man falling in a boat
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Current through an inductor after a switch closes
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Comparing Acceleration and Time Of Different Slopesm
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Newton's First law: Barrier on large transport trucks
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Damped Harmonic Oscillator and Resonance
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Why does changing the frequency of a wave affect the energy?
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What causes the acceleration in a circular motion with a pulley system?
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Kinematics - How high is the balcony
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Calculating Magnification: Diverging and Converging Lenses Equations Explained
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Unable to understand how higher current results in lower p.d
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Angular Momentum - rotating rod makes an angle phi with axis
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X-ray Tube Output: 80μGy/mAs at 1m, 900µGy/s @1m
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Final speed with mass, initial velocity, force, displacement
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Uncharged object between two charged plates
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How Does Intermolecular Potential Energy Behave in Ideal and Real Gases?
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Intensity of an electric field near a wire -- With and without Gauss' Law
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Schrödinger Equation: Solving for Energy in a Semi-Infinite Square Well"
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Can You Focus on Two Distances at Once?
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Calculating Velocity Vector for Cue Ball Collision
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Distribution of acceleration over axes
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Question on energy conservation with centripetal acceleratio
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