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.
Hydrostatic Equilibrium Problem Involving a Cube and two Liquids
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Question about a simple model for for back EMF
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Gravity and Orbital Velocity: Understanding a Common Misconception
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How Does a Positron's Kinetic Energy Change with Magnetic Field Strength?
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Relationship between closing a switch and the total battery current
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Static friction coefficient for a crate in the back of a truck
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Why do monocrystalline solar cells have rounded/cropped edges?
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The attractive gravitational forces between two people separated by 1.5 meters
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Electric Field and Continuous Charge Distribution
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Calculating the Solid Angle of a Nebula from Earth
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Current generated by plasma of uneven density in a Magnetic Field
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Refraction of light question -- Flintglass submerged in oil
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Does "internal force" have 2 meanings in physics?
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Why is the Velocity equal to joules per kilogram?
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A ball climbing a ramp while "rolling the wrong way"
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Swimming to and fro across a river
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What exactly does the Work-Energy theorem say?
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What is the Correct Distance with Force from Both Sides?
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Gravity and Energy -- Two masses above two different planets
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Area Under Frequency versus Time Curve meaning?
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Practice Problem about the Energy of a Pendulum
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Vaporization latent heat vs boiling point
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Are there 2 correct answers to this transformer homework problem?
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Understanding the Differences Between Bose and Classical Gases
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Conservation of Linear Momentum of Rigid Body
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Moment of inertia of a disc using rods as differential elements
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Coulomb's Law -- dielectric problem
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Using Lorentz Force to derive V = E/B
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EM fields and Current between 2 charged cylinders
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Machine Dynamics: Manual Air Pump Calculation (please check my answer)
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A Graph analysis problem to find when the acceleration is zero
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Intensity of central maxima of crystal diffraction
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Finding the gain coefficient at line centre for a HeNe Laser
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How do you calculate the impedance of the primary circuit?
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How is the Relativity Formula Proven for an Electron in an Electric Field?
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Calculate Ip: 9V, 120V Transformer Equation
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Understanding the Forces Behind Part B of the Graph
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Superposition of two simple harmonic motion
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What can I investigate regarding the mechanics of bikes?
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How Earth's rotation is changed by the change in inertia when you get out of bed
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Binding energy per nucleon of the nucleus
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Calculating Track Acceleration Due to Gravity
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Restoring force on a ball connected to two rubber bands
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Why is My Polarized Plate Field Calculation Incorrect?
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Where Will a Jumper Land on a Moving Train Around a Bend?
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Deriving and Verifying the Relativity Formula for Electron Speed
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Electric Force: Equilateral Triangle
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Point charge near charged plate
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Electric fields of charged plates
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Problem on Pressure due to Surface tension
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A query about this electrical circuit symbol
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Specific heat capacity & heat capacity
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Momentum of a ball bouncing off of the floor
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SR - Getting Zero Spatial Displacement
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Thermal energy transport via conduction
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Potential difference calculation
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The relativistic Doppler effect
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How do I calculate the ratio of forces between two conducting spheres?
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Finding the tension of a support cable to balance the beam
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Finding the depression and the tension of the string
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Why is magnetic field half at the sides of a solenoid?
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Calculate the Mass of Ice cubes needed to cool a soft drink
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Deriving electric and vector potential
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Oblique shock waves: how to find the wedge angle for trailing shock?
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Is My Delta to Wye Conversion Calculation Correct?
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A steel shuttle is pulled along a rail, what is its initial acceleration?
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Pulley system -- Calculate the mass that balances this pulley system
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Charge on two spheres related to Earthing
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Need help with Finding absolute magnitude
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Damped Oscillatory Motion with Varying Bump Timing for Control
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Balancing Nuclear Equations: Mass & Atomic Number Confusion
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Relative Humidity and Temperature Changes when adding Heat
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Would particle P be under non-unform circular motion?
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Calculating F, V and C: Why Can It Not Be Obtained This Way?
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Iron block dropped into a container of water sitting on a scale
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Q of radiating electron according to classical theory
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Work and Energy on a Slope - How Does a Block Move Up with Zero Net Work?
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Find the gravitational field strength of planet X
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Problem on Diffraction Grating and Laser Crystallography
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Explaining a Physics Formula in Non-Physics Terms: Answer B
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Location of the particles when 1.5 periods of a sound wave have passed
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Symmetry & Field of an Infinite uniformly charged plane sheet
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How to find an expected value for magnetic field strength?
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Angle of incidence and total internal reflection
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What is the scale of lengths on diagrams for a ripple tank?
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Calculate the voltage across a resistor using Thevenin's Theorem
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Solving Unusual Problems: Using the Polytropic Ideal Gas Equation
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What is the maximum electric field magnitude between the cylinders?
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What is the Relationship Between Work and Friction?
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How to Find the "Net Change Ring Area Ratio" for the Zeeman Effect
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Solving Part B of e=1500*18/(1.3x10^11 x 0.000452389)
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Oscillations in an LC circuit (Question from Irodov)
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How Does the Magnetic Field Relate to Frequency in Electromagnetic Waves?
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Is the Induced Electric Field Proportional to Radius in a Cylindrical Region?
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Induced EMF in a small square loop of wire at center of an AC Circuit
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Analytical question: circular rotation
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Earth's rotation slows down slightly over time -- How much energy is lost?
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How to find the voltage threshold at which diode switches states?
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Find electric field intensity/density with given potential difference
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Mixing Newton's law with Adiabatic Process
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