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.
Calculating the Electric field inside an infinite planar slab using Gauss' Law
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Error propagation leads to different uncertainties, which do I choose?
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Rotating Rod in Plane: Kinetic Energy & Moment of Inertia
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Torque on two pillars (introductory physics problem)
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The FBD Mystery: Why Isn't Normal Force Along Radial Line?
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I try to solve a thermodynamics problem on heat transfer
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Deriving Wave Function for One-Dimensional Sinusoidal Wave
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Find the speed of the biker at the bottom of the hill
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Lorentz Transformation - Speeds relative to different observers
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Does the Galilean transform rely on 2 events?
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What Is the Connection Between Buoyancy and Apparent Mass?
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Problem involving Torque and a Derrick from Feynman Exercises
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Angle between normal force and radial line for cylindrical coordinates
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Kinetic energy of an alpha particle
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A Puzzling Equation: Will the Block Slide or Not?
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Calculating Area & Direction of Magnetic Field
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Solve Angular Velocity & Acceleration - Dimensional Analysis
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Healthy Eating for Kids: 5 Simple Steps
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Distance traveled by a Ball affected by friction after t seconds
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How to find resulting velocity in a perfectly elastic collision?
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Inelastic collisions with constant momentum
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Explosion of 2 Carts on a Platform (Momentum)
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Finding Velocity: Ek of the Trolley
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External force on three blocks stacked
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How do I find the work done for a 100 N downward force?
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Finding the WORK done by a crane in lifting a load
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Approximating Answers When Exact Numbers Are Involved
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Analyzing Motion: Deriving Displacement Graphs from First Principles
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Bungee jump | simple harmonic motion
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Why is a small nut attracted to a straw whereas it should be repulsed?
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Static Friction Required to Keep the System from Moving (Two Boxes)
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Derive an expression for the radial charge distribution of an E field
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Why is my method for finding the spring constant incorrect?
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Coin Slipping on a Spinning Wheel
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Period of a simple pendulum with a magnet under it
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Find the Coefficient of Kinetic Friction
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Suvat vector versus the scalar form
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Do you need to account for the water heating up to the boiling point?
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Static Friction Between a Box and the Floor
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How to apply the First Law of Thermodynamics to this problem?
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Why Is Taking Moments at Point A' Incorrect in Rotational Balance Problems?
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Calculating Trajectory Equation of Motion for a Rock Touching a Wall
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Two charged spheres hitting each other
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Significant Figures Verification
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Find acceleration of Moving incline with a block on it
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Find the tension in the two strings
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Use the energy method to find the distance moved by particle
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Change in Angular Velocity While Orbiting With No Torque
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Calculating Ion Distance in a 1D Lattice: A Simple Solution
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Finding acceleration from Velocity vs Position graph
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Intermediate axis theorem (Tennis racket theorem)
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Pressure inside the zeppelin for it to float
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Calculating the motion of air cylinder
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Understanding the Bungee Jumper Problem: Energy Transformation and Calculations
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Masses colliding due to gravitational attraction
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Satellite mechanics: linear and rotational momentum
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What is the minimum time at a given angle on a cone with constant size?
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Ring Impedance & String Connection: Is It Valid?
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Problem related to Archimedes' Principle and Buoyancy
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Angular deceleration of a circular saw blade
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Acceleration of a suitcase in an accelerating train after getting pushed
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Maximizing Ladder Stability: Understanding the Principle of Moments
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Calculating the Center of Mass of a Uniform Thin Hoop Using Symmetry
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Q：Hydrostatic Pressure vs. Energy Conservation Equation
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What Causes the Different Paths of Projectiles and Planets Under Gravity?
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Doubt about solution -- Two masses connected by a rod moving on a surface
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Newton's Third Law for book on a table
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Question about the Microscopic Model of Current
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Integrating Biot-Savart Law at a point
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Electric Field of a Uniform Ring of Charge
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Experiment - how temperature changes along a tube, using heaters
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Speed of Current in a coaxial cable
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How could the discrepancy be reduced between the two readings?
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Current on Infinite Periodic LC Circuit
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Buoyant force acting on an inverted glass in water
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Kinematics in Two Dimensions (Monkey and Hunter Thought Experiment)
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Why does less dense air rise and more dense air come down?
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Falling stick problem (no friction): What is the kinetic energy?
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Angle between proton velocity and B-field
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Impact force of model rocket with parachute
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How do I find the normal force?
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Weird Thing About Coriolis Acceleration and Coriolis Force?
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Dimensional Analysis: Forster Energy Transfer equation
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Magnitude of external electric force on electric dipole
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Oscillation of bead with gravitating masses
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A ball is dropped from the top of a 55.0 m high cliff
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Krotov problem: how to write Energy conservation for this fluid?
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Question about source flow rate across line AB.
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Question about flow rate in the source flow
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Angular deceleration of the Earth
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Motion with Time-Dependent Angular Acceleration
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Why Wasn't (0,-3) Included in the Initial Graph of a Traveling Sinusoidal Wave?
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The percentage error in the Radioactive substance Population
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Calculating Chemical Potential from Energy Derivatives
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Is a point of inflection concave or convex? - Which answer is correct?
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Solving the SHM differential equation
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Why is it important to classify circuits as series or parallel?
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How Does a Moving Support Affect Pendulum Motion?
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What is the least time to get from point ##A## to point ##B##
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Morin classical mechanics differential equation problem
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