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.
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Homework Help Guidelines for Students and Helpers
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Hey I posted in homework help but now it's gone
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Homework Help: Introductory Physics Formulary
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What force causes precession?
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Power of a thin lens in a medium is 1/fₘ or μₘ/fₘ ?
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Expansion or compression -- which is more energy efficient?
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Why does a fan cool you in a sealed room if it adds heat?
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Cornering on a Smooth Surface
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If Heat Is Motion, Why Isn’t All Motion Heat?
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Finding potential difference in a circuit
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Paradox in Induced Dipole Forces: Does it violate Newton's Third Law?
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Semiconductor surface engineering
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814
Why can’t we observe all regions of the universe?
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Equal heat added to two spheres: why is the hanging sphere hotter?
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Newton's laws homework: inclined plane with pulley
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A very simple moments question
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Simple Thermodynamics question: Temperature of water in a cup after adding cooler water to it
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Sliding block hits and compresses a spring
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Finding proper value for centripetal acceleration in a plane rising up
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Simple problem with voltages
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Slipping/Rolling Motion on Inclined Plane
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A practical way to determine geographical meridian
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Voltage that gives acceleration to relativistic particles
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Angle between two alpha particle tracks due to proton bombardment of a nuclei
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Which material will stop magnetic attraction?
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Physics Homework, conservation of momentum and relative velocities
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Rotating difraction grid
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Spring aproximation
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Finding the acceleration of a block on an inclined plane with friction
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Doppler effect: why do I find this exercise so difficult?
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U-shaped length of chain falling when one end is released
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How is x-vt a rightward moving wave?
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Find the acceleration of a block (some sort of double Atwood machine?)
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How do I derive an expression for the velocity vector for any α?
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Difficulty understanding the reasoning behind constraint equations in mechanical systems
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Electric potential due to shell containing a charge at an offset outside
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Working out the accelerations in a double Atwood pulley system
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Correct statement about size of wire to produce larger extension
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Charge inside nested spheres
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Pressure difference between two points in a tapered pipe
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Magnitude of buoyant force in fluids of different densities
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Voltage vs Distance graph for a given E vs D graph
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Correct statement about random process of radioactive decay
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Curving of gravitational field lines
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Is it possible for a vertical rod balancing on a table to lose contact by striking the top of the rod?
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Bernoulli vs real life experiment
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Which one is correct statement regarding lightning?
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Cone on horizontal surface
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Chain falling out of a horizontal tube onto a table
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Earthed plates confusion
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2 pulleys 3 masses problems
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Force between two halves of a current carrying hollow cylinder
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Two-layer dielectric, four-capacitor model vs three-capacitor model
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Proof of law of sines using cross product
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Magnetic field due to a coil wound on a hemsiphere
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Falling capacitor connected to constant voltage
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Decrease of amplitude in RLC circuit
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Coulomb's force vs the Lorentz force
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Cone Rolling on Conical Surface Dynamics
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Speed of moth related to Doppler Effect
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Struggling to make relation between elastic force and height
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Correct statement about a reservoir with an outlet pipe
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Correct statement about siphon used to empty water tank
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Bullet collision question
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Confusion on sign convention in X-ray problems
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Minimum height of water to make the particle visible
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Ice cube in water: entropy calculation (Calorimetry)
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Flux through a ring due to two charges
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Static Mechanics: Aircraft Nosewheel Linkage Torque
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Stacked blocks & pulley system
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Voltmeter readings for this circuit with switches
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Formula for Electromotive force?
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Trying to understand the logic behind adding vectors with an angle between them
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Rolling without slipping on a curved surface
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A bead-mass oscillatory system problem
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Problem about units conversion: cm^2 --> m^2
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Correct statement about movement of curve ball in a fluid
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Mechanics question: Three masses and a pulley on a tabletop
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How to find eddy current (circular) path in this pendulum experiment?
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Mechanics homework confusion
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Why can I neglect angular momentum due to precession here?
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Egg Drop Challenge! Need ideas for winning designs
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Multiple reflections in a mirror system
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How fast is the fly's shadow moving?
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Struggling to understand the concept of this question (ice cube in water optics question)
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Electromagnetic field theory -- Potential inside a conducting sphere
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2 wires attached to another wire attached to a block
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Phase relation between two waves
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Understanding Forces and their Vector Components
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I've come across another fluid pressure problem I don't understand
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I need help making a relation between piezoelectricity and earthquake
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Variable mass system : water sprayed into a moving container
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What Determines the Minimum Mass of a Block in a Collision Scenario?
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Adding and subtracting vectors using vector diagrams
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Electric field due to charges between 2 parallel infinite planes
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Sources for Physics Research Paper on Rotational Blade Motion on Helicopter
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Spherical capacitor RC system -- determine steady state charges
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Acceleration of a wedge: What forces act on the wedge?
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What Determines the Minimum Mass of Block B for Movement on an Inclined Plane?
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Why is the derivative of the potential at a surface assumed to be continuous even though there is surface charge?
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Current through shorted branch -- clarification
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Different way to find center of mass of Hollow hemisphere
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Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations
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