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.
Planet moving in elliptical orbit around a star
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Why can we add impedances in series?
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How to understand the direction of tension in a charged closed ring?
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11
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Internal energy of a gas and kinetic energy, "typical velocity"
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Damped harmonic oscillation
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Question on mirror and lens combinations
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Find the direction and the magnitude of Frictional force
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3
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Shortest distance along the shore and into the lake
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6
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Magnitude of magnetic field at different points near a capacitor.
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How to find voltage across capacitor in RLC circuit?
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Vertical circular motion
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8
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Can Geiger Counter Ticks be converted into particle/wave counts?
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12
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Kinematics: Acceleration of a figure skater changing direction
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16
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Find the electric field at a point in 3 dimensional space
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2
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50
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The electric potential inside a conducting sphere with charge Q
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11
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X and Y coordinates of an oscillating object on a spring.
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3
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857
Simultaneous events separated by distance and time
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5
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821
Finding speed of spaceship traveling to star ##a## light years away
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8
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958
Stationary observer meaning in relativity problem
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14
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877
Particle moving at speed ##bc## relative to laboratory frame
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20
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Why Doesn't Time Dilation Affect Pendulum Observations on a Moving Train?
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8
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982
Two cyclists ride between a pair of towns with and against the wind
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17
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Universal gravitation’s problem -- Balancing gravitational forces from 2 masses
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3
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662
Prove that the field due to a circular arc is same as its bounded tangent at the centre of curvature
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23
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Experimenting whether the diameter of a pot affects boiling time for water
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15
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How to obtain amplitude of current in parallel RLC circuit?
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3
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Uniform Motion in 2D - A man chasing a bus
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20
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Understanding the generic nature of linearity in Physics
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2
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Ap physics 1 velocity center of mass question
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4
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914
Self-inductance of LC circuit given rate of capacitor discharge.
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6
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Formula for the average EMF of generator
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6
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Calculation of current in driven series RLC circuit
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8
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Magnetic energy density, self-inductance of coaxial cylindrical shells
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10
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Test question: What is true for a mechanical impact?
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7
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Find work given two conservative forces and a nonconservative force
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9
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Two candles making shadows of one another on opposite walls
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3
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Atmospheric pressure and water pressure - Boyle's law
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6
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Confused about how forces in a pulley balance
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6
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A vertical U tube rotates about the vertical axis -- Find omega to cause this height offset
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15
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IPHO classical mechanics: A mass falls on an exoplanet
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2
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Electric field & force due to charged insulating hemispherical shells
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12
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Induction heat flux density induced by wire in a slab
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Non-Uniform Magnetic Field Calculations
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9
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Power Radiated From a Copper Cube
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3
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Modelling a metal detector using eddy currents from Non-Destructive Testing
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1
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Forces on Elliptical Current Carying Loop
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10
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Friction Required for Billiard Ball to Roll without Slipping
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3
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60
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How to find the potential of a field that has regions of non-zero curl
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Sound Wave Diagram Help
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Determine the velocity of the Slider
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5
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Building a Marble Catapult
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3
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Gauge pressure due to a floating body
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Sign conventions for Kirchhoff's loop rule
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7
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Resistance force changing the velocity of an object
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8
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Thermodynamics: Cooling of a heated block of iron in contact with air
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29
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Work done by power supply to maintain a constant current
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Unit vectors that change as a function of time
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13
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Electric field at a point inside a non-uniformly charged sphere
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Looking for data about different types of carbon fiber chemical properties
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Angular momentum conservation on a merry-go-round
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Power dissipated over 1 cycle of a AC source-free RLC series circuit?
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Angular momentum for a bullet and a rod attached to a ceiling
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Force Between 2 Coaxial Current-Carrying Loops
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How Long for a Beam of Light to Reach Earth?
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Particle confined in 3D box - quantum states
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How to Calculate θ3 After Finding θ2 Using Snell's Law?
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Electric field vector equation: Finding the neutral point for two charges
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2
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Find number of microstates of combined system
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Experiment measuring the distance dependence of a suspended metal bolt from a magnet
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13
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Induction confusion for induced charge inside a metal conductor
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23
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Significant figures doubt
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3
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807
What would the slope of the force between 2 charged particles vs 1/r^2 give me?
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Gauss' law and the potential V (plane layer case)
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Water flowing out of a rotating vessel
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Using Kepler's laws to calculate elliptical planetary motion
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Help with Friction Forces: Box resting on a board on a frictionless surface
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What is the unknown circuit element in RLC circuit given plot of V, I?
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4
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Find at what rate the orbit radius will grow
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Initial velocity of rolling ball
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Did my textbook make a mistake when writing these units?
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Fresnel Lens - Solve for Lithography & Power
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Physics about electric circuits: Changing the resistors changes the currents
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Thermodynamic Work vs Mechanical Work
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Classic Incline problem with cylinder
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13
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Using conservation of energy and momentum in projectile motion
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18
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Torque calculation of CV joint
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Lagrange equation for block and incline
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13
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Fundamental quantities and derived quantities
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Projectile Motion Problem Involving Initial Velocity and Gravity Only
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11
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Cart sliding along horizontal with spring connected
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11
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Does the voltage across a battery include its internal resistance?
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Calculate electric force using Coulomb's law (vector components are the struggle)
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3
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Two tourists and a bicycle - uniform motion
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How many people can be on the raft?
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Find the magnetic induction vector
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Blowing Into Your Own Sail
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Drag Forces and Terminal Velocity
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8
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Why the need to be careful opening a switch on this RL circuit?
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6
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Ratio of frequency between heavier and lighter part of composite cord
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4
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Need help, to help, a friend with their HW (High School)
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6
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