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.
Heat related problem -- Mercury solidifying liberates some energy
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Ideal gas law problem -- Pneumatic piston movement with air temperature changes
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Fundamental Forces: finding velocity using different fields and forces
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Can doubling the particle density in a fusion reactor increase energy output?
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Angular Momentum: Spinning Mass
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Rolling 3 objects on an inclined plane
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Angular Momentum Problem: Rotation Rate
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Problem related to a parallel plate capacitor
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Solving Mutual Induction Exercise | Let's Get Started!
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Angular Momentum Problem: Determining Angular Acceleration
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How many neutrons are produced in nuclear fission?
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Angular Momentum Problem: Torque after fall
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Displacement & Angle Theta: Figuring Out Centripetal Force
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Optical Problem: drawing the reflected wave
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Are there situations in which Newton's laws are not fulfilled?
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What's the angular acceleration?
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Ampere's law to find free current in a wire
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Fundamental Forces: Spring Question
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Equilibrium temperature in a homogeneous section (stationary regime)
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Eigenfunction proof and eigenvalue
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Magnetic field of the planar wave
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How Do I Perform a Galilei and Lorentz Transform?
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Solve 2D Asteroid Problem: Step-by-Step Guide
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Projectile Motion in 2D: Solving for Maximum Range in Inclined Planes
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Fundamental Forces: Force of one charged particle on another
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Fundamental Forces Problem: Net Force from Gravity
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What is the general dependence of the phase velocity on wavelength in glass?
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Fundamental Forces Problem: Acceleration from Planet
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Forces Experienced On Moon and Earth - What is the mass?
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Inelastic collisions -- how is momentum conserved but not energy?
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How Do Sign Conventions Affect Calculating Net Force on Charges?
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Ice pond with no friction -- how to get across?
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Energy of a photon scattered due to the Compton Effect
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Line Integral to Verify the Magnetic Field B
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Pendulum, Rotational Inertia and Center of mass
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Electromagnetism -- What do charges have to do to create EM waves?
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Solving for Theta & Io: An Exploration
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Calculate Wavelength Without Frequency
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Integrating Mass of a Hollow Sphere: Multivariable Calculus Explained
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How Do You Calculate the Force Between Two Masses?
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Calculating Masses from Fnet: What Am I Missing?
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Finding mass to resonate a system
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Changes in Work done with changes in the centre of mass of a tool
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Friction between a mass and a conveyor belt (ENGAA 2017)
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Ball hitting racket - Momentum Question (ENGAA 2017)
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Physics Pressure Problem (Systolic blood pressure of a giraffe)
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Ball's motion after one bounce off the ground - SUVAT Question (ENGAA 2017)
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The resistance of an element shaped like a half-cylinder
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To calculate torque on a supported beam
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What is the role of the projector operator in vector manipulation?
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Why Did My Torque Sign Change in Rotational Equilibrium?
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Thermodynamics problem relating to Chemical Potentials
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Help graphing Vectors in polar form
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Calculate speed from elastic and inelastic collisions? (momentum)
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Nuclear fission calculation of energy released
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Find the electric field from charge density
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Rotational Equilibrium Problem
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Motion Equation for a magnet on a spring
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Understanding Complex Circuit Configurations
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Physics Bloopers: Sound Level Problem Gone Wrong
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How to determine the number of meshes and loops in a circuit?
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How does the magnetic force affect torque on a current-carrying wire?
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Spring Constants problem at the High School level
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What is the refraction index of liver?
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Electron moles present in wire cross-section
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Understanding Changing Forces in Equilibrium: A Scientific Approach
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Average Kinetic Energy of molecules calculation
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Conservation of Angular Momentum -- Child jumping onto a Merry-Go-Round
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CO2 Sequestration and Cave Pressure Problem
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Why is ro = 0.2255 in fluid dynamics vortices?
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Physical observables determined by quantum numbers: n, l, ml, ms
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Help with electrostatics problem (spherical shell charge distribution)
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Nuclear Reaction: 6.61 MeV Protons Incident on 27/13 Al
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Are there kinematic equations that are not always true?
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EM Wave Reflection and Transmission Between 3 Materials
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Period of a metal rod oscillating in a magnetic field
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Crane Lifting a Car -- Find the Work Done
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Solving the Puzzle of Chain Energy: Tips & Tricks
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Understanding the electric field of a sphere with a hole
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Black Body Radiation: Facts & Overview
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How is the Answer to 3(d) Found in Simple Harmonic Motion Problem?
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Why Might a Math Solution Involve Doubling the Percentage Difference?
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Using Orbital Energy to Calculate Velocity
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I'm not sure which units I should convert this to
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How to Solve Two Masses Connected by a Spring in Ground Frame of Reference?
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How is the Ideal Gas Law Derived from Temperature and Pressure Relationships?
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Understanding Tension in a Physics Scenario
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Rate of flow - thermal physics
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Rigid body kinetics -- force on ankle joint
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How Far Will the Baby Be from the Platform When Batman Catches Him?
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How to Write #s w/ Uncertainty: Rules & Examples
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Pressurized Line and Rigid Tank Probem
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Circuit analysis involving parallel and series conditions
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The electric field between two adjacent uniformly charged hemispheres
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Calculating air resistance for a cart rolling down a ramp
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Uniform Circular Motion: banked race track circular path
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Using Matlab ode45 to solve a simple 2 body problem
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Help please with the Thevenin Equivalent of this circuit
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How do we determine whether circuit element is negative or positive?
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Uniform Circular Motion on a racetrack
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