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.
Balmer series experiment
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Spherical pendulum confusion [Issue resolved]
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669
Launch service between two stations along a flowing river
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Book plots position & force on the same graph, still gets right answer
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Why is source force + electrostatic force = 0 inside battery?
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Relativistic motion and length contraction
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Circular motion doubt: Angular velocity vector for general planar motion about a point in the plane
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881
Critical frequency of Faraday Waves?
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Find starting velocity from golfer launching ball
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832
Why is the electric field inside a conducting hollow/filled sphere zero?
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890
Slope of N - t graph of radioactive decay
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897
Question about Feynman diagram showing annihilation
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888
Coupled oscillator question
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805
Tension in a Two-Crate System on a Frictionless Surface
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888
Forces at play in a pendulum (conceptual doubt)
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753
How do I fix the signs in Faraday's Law in RL Circuit?
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Resistivity calculation from two-probe resistance measurement of sheet
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782
Simple pendulum with moving support
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Change in the unit vectors
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865
Coupled pendulum-spring system
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976
Field transformations in the z-direction
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2K
Pendulum attached to a rotating vertical disk
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The value of the spring constant k that I calculate seems too high
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1K
Understanding the math of definition of electromotive force
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Length of string in a standing wave
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Field due to an electric dipole (Halliday & Resnick, Ch. 27 problem 23)
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595
Understanding a very simply RL circuit
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936
Small oscillations of a simple pendulum placed on a moving block
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Lab Exercise: Measuring "g" using Conservation of Energy
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Kinematics problem from a competition: Will the 2 sliding boxes collide?
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837
Flashing light beacon from Earth reaching spaceship moving away at 0.75c
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5
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671
Rolling Sphere On Incline
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851
Block sliding on a semicircular track with friction
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2K
The maximum reversible work in thermodynamics (2)
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846
Formula derivation connecting vertical water flowrate & horizontal distance moved by a suspended sphere
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7
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Impulse and momentum / work-energy
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918
The maximum reversible work in thermodynamics
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Do you graph the energy levels of a ##1s^1## atom the same as a ##1s^2## atom?
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Magnetic dipole moment and integration surfaces (Introductory Electromagnetics - Magnetistatics)
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975
Charge on a grounded conducting sphere in a uniform electric field, after ungrounding and movement
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Conservation of momentum (center of mass) in projectile launches
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Range of frequency heard by observer related to Doppler effect
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Vertical displacement with time of a projectile
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Spring Constant Force Problem Help
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Is current flowing into a battery always equal to current flowing out?
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Total Internal Reflection and Transmitted Wavelength
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984
Understanding self-inductance in a solenoid.
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Condition for resolution of two point sources of light
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874
How do I model this function? (Damped Harmonic Motion)
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Emf in coil rotating inside magnetic field
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940
Refraction of light when traveling from air to glass
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Finding critical angle: not sure which one is correct
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Origin of repulsive force on a magnet approaching conducting ring?
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A wheel of radius r rolls along a curve
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Electronic Circuits - Calculate voltage
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Newton's third law and weight
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Query related to Two-Dimensional Motion
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Camera drone and speed of air below it
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Graph of viscous force and velocity
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Projectile motion, initial height and range given, find initial velocity
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Need to derive a formula for the number of red giants
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Question about time dilation
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Derive trig equations 4, 5, and 6 from 1, 2, and 3
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Friction - same direction as motion?
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Center of mass acceleration for an inclined plane and mass m
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How Much Vertical Acceleration Does a Jet Need to Avoid a Hill?
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681
How Does Coriolis Force Influence Particle Motion in Rotating Systems?
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2 Masses attached by a spring in the vertical axis
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Minimum work done to push the cube over
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Gauss' Law for a conducting / non-conducting sheet
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Is the Charge Conservation Correct in This Meson Decay Feynman Diagram?
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Find the value of ##t## when ##P## returns to ##X##- Kinematics
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Find the tension in the rope PQ
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796
How Do You Correctly Cancel Angular Momentum in Physics Problems?
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Question about acceleration of free fall
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Calculate voltage over capacitor and resistance
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Solve the problem involving the velocity - time graph
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982
Question about the energy of 2 blocks with a spring between them
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903
How Is Work Calculated on a Conveyor Belt with Friction?
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Find the initial velocity ##U##
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How Does Energy Transform in a Bungee Jump?
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2 Masses and a Wheel (with mass)
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Horizontal force by block on a beam
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Calculate the frequency of rotation when a coin flies off a turntable
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Trouble solving for end state of two control volumes in a rigid tank
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Help again in interpreting a pulley with a spring and a block
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Find the value of ##T## and distance of particle in the first ##4## seconds
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A small disk and a bigger half disk
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Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
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Rotating ball and string Rotational Kinetic Energy?
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Why Isn't the Spring Force Sum of Both Ends?
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What is the induced magnetic force on this closed current loop?
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Calculating the spring force constant K
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Determining Inductance L in an LC Circuit
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Power, force, velocity and tension...
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How Do Power, Force, and Velocity Interact?
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The ratio between two horizontal speeds in this pendulum arrangement
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Inelastic collision of two squares
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Two bodies connected with an elastic thread moving with friction
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How to obtain correct negative sign in calculation of motional emf?
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