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.
Brightness of two lamps in a circuit having a changing magnetic field
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Which material has the greatest Young's Modulus?
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How many discs will slide off the board as it decelerates?
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Correct energy transformation about circuit with EMF, a resistor and a motor
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Momentum in a Head-on collision
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Contradictory Sources: Trying to understand waves on a rope being reflected at a boundary
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Assistance in cutting down unneeded information in physics report
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2 masses connected by spring, one is pulled, how much does the spring stretch?
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Questions about speed and motion of a toy car on a conveyor belt
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Diffrence between resolving vector to components and find projections
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Two Equations for Average Velocity?
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Will The Cars Stop In Time? - Check My Work Please :)
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How can a transistor behave as a switch in the saturated region?
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Electric field in a second dielectric given a 2 dielectric system
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Atwood at an incline accelerating down
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Coherent interference at a low photon flux rate
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Work done during a collision -- Change in Kinetic Energy & change in Momentum
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What is the rocket's initial acceleration?
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Working mechanism of straws and siphon
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Magnetic field in a solenoid with rectangular cross-sectional area
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Calculations involving different Dielectrics and Capacitors
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Why Does Torque Equilibrium Not Solve for Fcy in Static Equilibrium Problems?
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Special Relativity problem: Lorentz transformation and Reference Frames
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Why can a fluid that satisfies the continuity equation cross streamlines?
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E&M: Gauss' Law Surface Charge Density
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What force is needed to break a rope?
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Particle experiencing only an angular force, determine the r dot
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A circuit involving two non-linear resistances (incandescent lamps)
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Q: Confusing Conservation of Mass Flow Rate and Conservation of Flow Rate
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Why Was My Thread Closed on the Physics Forum?
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Is My Approach to Calculating Relative Velocity Correct?
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Difficulty in deciding when to apply work energy theorem
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Rydberg constant for hydrogen atom and Balmer series
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Work done by gravity on a car rolling down a hill
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Basketball thrown straight up from the ground
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Q: The instantaneous gas discharge of the system and the C-E
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Problem with when to use Force and Energy. What compresses spring/
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Question about Formulae for Motion in a Rotating Reference Frame
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Fraction of light reflected inside a diamond
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Estimating Error in Wavelength from Graphical Approach
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What will the final velocity of the particles be?
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Faraday's law -- Confusion about which Area to use in calculations
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Switching reference frames between two intersecting lines
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Why is there no acceleration in the southern/y direction?
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Coaxial semi-infinite solenoid and superconducting disc
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I need feedback on MCQ test in IJSO style
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Ratio of Excited Neon Atoms in 5s compared to 3p
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What force is needed to push out this slab on the bottom of the stack?
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What is the Resultant Force from adding these two forces?
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Explain the phenomenon of decrement of angular momentum
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Verifying the acceleration of gravity in our lab (help with error please)
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Consideration of number of significant figures in experimental quantities
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Converting Energy to Mass: Understanding the Relationship Between MeV and kg
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Verification of ideal gas law experiment
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Calculating components of a third-quadrant vector
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Standard angles for vectors (Mechanics)
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Calculate the torque that is produced by this force on a cylinder
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Inductance Puzzle involving coplanar conducting rings
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Diamagnetism confusion -- Does diamagnetism really have to do with Lenz’s law?
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The theory behind sound generation from spinning objects
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Box on treadmill connected to a spring
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I need opinions on a Projectile Motion problem that I made up
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How Does Lenz's Law Explain the Jumping Ring Phenomenon?
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Resolving Velocity Components in Constrained Motion
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Coulomb's Law Application: A charge repelling a mass on a frictionless incline
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What is a Solid Angle and How is it Calculated?
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Needs clarity on this displacement vector diagram
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RLC circuit resonance experiment
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Conceptual doubt on frames of reference
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Problem with Dynamic blocks on a fixed inclined plane
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Why are they using Cosine instead of Sine for Cross Product?
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Homework help with interpreting SUTAV questions
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How much work is done to hold a book at a constant height?
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Are the Battery Capacity Calculations for Electric Vehicles Correct?
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About critical damping resistance of a ballistic galvanometer
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Statics problem on the resolution of forces
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Olympiad question on destructive interference
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Solve for the sum of 3 cable forces on one anchor point
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How can I pluck strings (with changing length) with constant energy?
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Graphing the Power dissipated in a resistor
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Particle moving from one potential to another
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Rate of EM emission based on surface characteristics
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Electric field between parallel plates
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Finding the center of mass of a simple 2D shape
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Calculating low frequency cutoff for this R-C microphone circuit
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What is the explanation for the divergence of the vector function r^hat/r^2?
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Change in system entropy in relation to heat transfer
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How can I show the drag force-velocity relationship of a shuttlecock from my recorded trajectories?
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Electric field in nonmagnetic material given a magnetic field
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Does weight affect braking distance for transport trucks?
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Finding the time for an object to start rolling without slipping
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Spring momentum conservation problem
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Rearrange formula to show a linear relationship between Frequency and Volume
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Help me solve this integral for the equation of motion
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Question about the integral used to calculate the voltage between two points
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Running princess and spider - time problem
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Why Is Work Positive When Done Against the Electric Field?
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Power output and sound intensity
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Why Isn't Momentum Conserved with Varying Disk Radii?
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Moment of inertia of a thin, square plate
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