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.
Relationship between wavelength and voltage?
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Order-of-magnitude analysis HW help
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How Does Kinetic Energy Change in a Partially Inelastic Collision?
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Snell's Law Question: Fish in a Fish Tank
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Optical Path Length: Calculate w/ Refractive Index & Length
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Theoretical Resistance Vs Experimental
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How Do You Find Frequency in an RC Circuit?
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Kinetic friction, pulley, inclined plane
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Derivation of torsion equations
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Collision, spring and impulse
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Change in density of water with depth
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Calculating Mass of Helium in a Balloon
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The Mouse Trap Car Thread Again
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Finding the Optimal Mirror for Your Dressing Room
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What Minimum Radius Prevents Cars from Leaving the Road on a Steep Hill?
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Help with building the brake a car for a physics project
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Wire & Compass Homework: Effects of Distance & Series Batteries
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A weight supported by two ropes
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Thermodynamic Cycle -- Work done as a function of Heat absorbed
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Electric field strength at a point due to 3 charges
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Fluid velocity and pipe diameter using the continuity equation
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When do these two moving particles come together?
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Image position and magnification for underwater spherical lens
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Maximum charge on the plates of a capacitor
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Motion Under Gravity: Physics Basics
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Graph Reading: Get it Right the First Time!
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How does the accuracy of the clock change when the spring stretches?
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Potential energy of a sphere in the field of itself
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Projectile motion when kicking a ball that lands on an upward slope
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Knowing when to decompose weight vector vs. normal vector
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(Introductory SR) Light sent from a spaceship received by Earth
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Electric Field Inside a Conducting Sphere: Is it Always Zero?
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Flux of Electric field through sphere
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Interference of light in thin films
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Lens Calculations using Refractive Index
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The relationship between physical and perceptual quantities
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Internal Energy of Gas and Work done
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Electric Potential Field Calculation
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Colorimeter transmittance and reflectance questions
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Solving Heat Transfer Equations for Rtot: Understanding Units and Formulas
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How Is Delta_h Calculated in Physics Problems?
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Is the Answer Sheet Wrong? A Closer Look at Velocity-Time Graphs
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Given two Earth satellites, A and B, find the potential energy/kinetic energy
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Deviation of Plumb Bob In Uniform Circular Motion
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Virtual Work and Static Equilibrium
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Leg suspended in a traction system
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EMF induced in a wire loop rotating in a magnetic field
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Degree of Freedom: Definition & Examples - Confused? Ask Here!
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Conservation of momentum problem (sand-spraying locomotive)
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Two metallic bars moving on rails enclosing a vertical B-field
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Number of collisions by a bullet
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Trying to understand electromagnetism
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A new take on a relative velocity problem
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New EMF and Frequency: Understanding Faraday's Law of Induction
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The potential electric and vector potential of a moving charge
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How to Determine the Sign of the Doppler Shift?
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Calculating Doppler Frequency Shift for Ultrasonic Waves
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Answer the question about time of cooling of a ball
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Calculate the coherent length of this LED
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Applying Dalton's Law: From Popcorn Launchers to Innovative Products
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Integrating motion equation to derive displacement
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Thermodynamic Process that Produces the Most Work
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Oblique slab dieletric material in a capacitor
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Intuition on the direction of friction in a rotational dynamics problem
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Setting two expressions equal to each other
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Change of entropy in the Universe in a thermodynamic cycle
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Environmental Physics - Radiative forcing effect on greenhouse effect
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Finding the Frequency Domain and Time Domain magnetic field
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Relationship between diameter and elastic potential energy of a wire
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Cylinder Falling from Unwinding String
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Requesting guidance on Commutators & Intro QM
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Time dependent canonical transformation
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How Does Out of Phase Interference Affect Sound Perception?
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Probability to hit a spherical area
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Question on Intro QM pertaining to Harmonic Oscillator
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Bragg angle with an inclined plane through a square lattice
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Is Removing c from the Square Root in This Equation Correct?
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Single Slit Interference Pattern: Increased Distance
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Understanding Driving Force in the m2 Equation: Explained by Experts
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Find Projectile Flight Time Given Only Maximum Height
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Calculate tilt angle of a bar lifted via two ropes on fixed points
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Pressure drop through volumes of compressible fluid
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Finding the Magnitude of the Force Acting on an Object
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Angular momentum of a disk about an axis parallel to center of mass axis
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Moment of inertia of a disk about an axis not passing through its CoM
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Seeking Guidance to Find Surface & Volume Bound Charges of a Half Cone
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Calculating Average Velocity and Acceleration of the Singapore Flyer
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Centre of Mass/Tipping Point Question
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Relativistic particle in uniform magnetic field (solution check)
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Graphical Impulse calculation from the graph of force verus time
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Determining $L_{o}$: Finding Angular Momentum of System
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Momentum and impulse problem: A mass collides with another mass on a spring
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Work done in adiabatic compression
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Potential and Kinetic energy equations including drag coefficient
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Find the Capacitance based on 3 different switch positions
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What is the Power Loss in a Transformer?
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Do electrons flow through a battery or is it something else?
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Anti-reflective lenses and interference
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Is the Result of the Path Integral Positive Due to Negative dx?
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New volume of balloon after adiabatic expansion
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