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.
Loop equations for this battery-resistor circuit
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Work done to insert a point charge 𝑞 at the center of a conducting sphere
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Understanding a math step in solving Schrödinger's equation for single particle in a box
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Center of mass and momentum- A question about systems
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Circle approximation of a wave pulse on a string or spring
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Calculating magnetic field outside a solenoid
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Aerodynamics: Optimization of an aircraft engine
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I do not understand why the extra 2 factor is there (energy of 1D electron gas at zero temperature)
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Rotating ring on a rough surface- but with a twist
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Electric potential of nested spherical shells
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Another rotation problem -- Acceleration of a ring rolling on a surface
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Why is it necessary to start this experiment with the water level at 400mL?
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Correct statement about light transmitted and reflected by windscreen
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Force pulling on a string at an angle with a block at the other end
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Confusion about friction in rotating ring
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Problem n. 7 chapter 4 Eisberg Resnick "Quantum Physics"
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A block dropping onto a spring system
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Paper 'helicopter' experiment - Adding Weight Decreases Flight Time?
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When are reactive forces enough to support this body?
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Can A Vector Have Components Of Say Y or Z in the X-Hat Direction?
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A problem about momentum and the elastic collision of two particles
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Identical Batteries in Parallel do not Draw Same Current, Non-Ideal?
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Homework assignment that I was able to solve using EDO, but need to use Laplace now
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Optimizing strength to weight in balsa wood deck arch truss bridge
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Displacement amplitude of the faintest sound detectable by a human ear
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Designing a speed bump given the maximum vertical wheel acceleration
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How do you Calculate Ampacity of a Conductor Geometry?
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A little annoying doubt -- Initial vertical speed of a jumping flea
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Calculate the Acceleration of this Car
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Two ropes pulling on a cylinder that is translating and rotating on a plane
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Optical path difference between two reflected rays
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Why is the Celsius symbol not placed on the Kelvin unit?
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Comparing weights of balloons
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projectile motion problem with no initial velocity given
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Calculate the Capacitance given the Charge and Potential Difference
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How to solve this problem in sinusoidal motion? (Satellite orbiting the Earth)
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Kinematics in multiple frames
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Clarify definition of measurement
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Direction of oscillations of a polarised light wave
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Find the height of a lamp based on the velocities of projectiles
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Velocity of a water jet exiting a water tank drain tube
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Electric Field Flux Question
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Static equilibrium | Uniform sphere on incline | Determining friction
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Energy Changes in Capacitor After Disconnecting from Battery
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Entropy of a sealed room with an open-door refrigerator
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Diffraction pattern from a grating
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Question About Induced Currents in Three Different Coils
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Is this question solvable by resolution of forces?
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Need my mind refreshed on geometry
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Kinematics problem involving multiple frames
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Why do water streams get thinner as they fall?
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Differential Equation of a Pendulum
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Time taken to slide down a circular path (with friction)
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Block sliding on vertical track with friction (Solved problem)
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Which of these rods are in equilibrium?
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Uncertainties For Wave Packets
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Separation of variables: Wave equation governing a string with fixed ends
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Interpretation of Negative Time in Minkowski Diagram
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Order of events in a train traveling at v = 0.76c
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Physics Exam Preparation: General question about auxiliary quantity and linearization of a function in physics
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Velocity vectors; arrow length
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Electrical Circuits - Parallel vs. Series
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Frequency of pendulum in the presence of electric field
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Electrostatic force on a test charge by uniformly charged annular disc
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Energy stores and transfer on a rollercoaster
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Truck accelerating down a ramp
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Question about Momentum and torque
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Spring scale tension
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Torque acting on dipole
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Leakage of Air in a Spacecraft
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Simulation of Elastic Collisions
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Charge separation of O-H bond in water molecule?
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Resonant frequency of L - R||C circuit
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Which one is a correct statement about oscillation?
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Why doesn’t my electric motor work?
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Scientific inference skill
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Find speed of CoM after collision between ball and "square structure"
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How to make a motor for an assignment
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Doubts on Diodes: Circuit Solving
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Dimension Analysis -Turkey Cooking
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Finding oscillation of SHM of this rod, mass and spring
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Upside Down Paper-Glass Water Experiment
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How to read spacetime (Minkowski) diagram for proper length
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Velocity required to escape the solar system
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How do you calculate the margin of error in Physics?
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Simple harmonic motion question
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Gauss' Law for Non-Uniform electric fields
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If closed integral of E.dS is zero over a surface, then...?
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Gauss' law: Cause and effect relationship on the flux
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No Electric Charges if No Electric Field in Region
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Least Square Method to fit a line to a set of datapoints
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How to Calculate Center of Pressure (hf) for a Tank?
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Maximum electric field from a blob
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Maximum tension in thread connecting loads
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What frequency will the bat hear?
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Work done by gravity on a hanging chain?
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Tension in a supporting thread after a second supporting thread is cut
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Entropy Change Confusion
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Hot air balloon question with bouyancy
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Pulley Problem on an Inclined Surface Using Energy Methods
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