Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Thermal energy problem: Gas expansion in cylinder
- Bonapartist
- · Replies 3 ·
Calorimetry: Finding mass of ice, water, steam left
- paulie
- · Replies 1 ·
Mastering Physics: Electron turning 90 degrees in capacitor
- danielhep
- · Replies 3 ·
Calculating Force of Impact: Solving for F in a Collision with a Steel Wall
- Sarah
- · Replies 38 ·
Polarity Reversal: Why Is Voltage of Right Source Negative?
- MeneerM
- · Replies 5 ·
Uniform Slab-Finding Electric Field Using Gauss Law
- Arman777
- · Replies 9 ·
Why does the spinning of wheels move a car?
- hndalama
- · Replies 1 ·
MasteringPhysics: Find the angle between the point charges.
- danielhep
- · Replies 8 ·
Relativistic Momentum of photon
- Blue Kangaroo
- · Replies 6 ·
Coefficient of Restitution problem
- CCC1212
- · Replies 10 ·
What is the Young's Modulus of Aluminum, Steel, and Brass?
- Edward Trail
- · Replies 14 ·
Moment of inertia for this assembly
- Elias Waranoi
- · Replies 2 ·
Rising of a hoop given the falling of beads
- Mr Davis 97
- · Replies 15 ·
How Does Earth's Core Contribute to Surface Heat Compared to Solar Radiation?
- toothpaste666
- · Replies 2 ·
Finding the scattering cross section
- Muthumanimaran
- · Replies 2 ·
Coulomb's Law and point charges
- absolutezer0es
- · Replies 7 ·
Calculating Frictional Force on a Roller Coaster: Solving for Final Velocity
- Claire
- · Replies 4 ·
How can I show that the bulk modulus is about r^-4?
- joemmonster
- · Replies 1 ·
Alternating RLC circuit with an additional capacitor
- solour
- · Replies 6 ·
How did my friend get this "Theoretical Velocity" ?
- AlexisFair
- · Replies 6 ·
Double slit experiment with a glass-covered slit of unknown n
- Nerrad
- · Replies 3 ·
Does refraction only happen wih light rays?
- StrawberryElf
- · Replies 4 ·
Calculating Electric Field Strength and Direction for a Negative Charge
- dragon-kazooie
- · Replies 4 ·
What Resistor Value Discharges a Capacitor 99% in 5 Seconds?
- Kajan thana
- · Replies 1 ·
Motion of Charged Particles in Field Uniform B-field E=0
- Eri ep
- · Replies 1 ·
Current of RC Circuit After Switch is Opened
- Math-U-Up
- · Replies 3 ·
Finding the angular frequency of an object
- t.kirschner99
- · Replies 3 ·
What is the electrical potential at point P?
- ikihi
- · Replies 6 ·
How to find the optimum angle for takeoff for ski jump using
- canycorns44
- · Replies 3 ·
What is the Angular Speed of a Rotating Object with Varying Inertia?
- Jax24
- · Replies 3 ·
Gravity between you and your computer monitor
- aatari
- · Replies 1 ·
What is the value of I3 for the given line integral and values of I2 and B?
- PolarBee
- · Replies 5 ·
Non-Complex Capacitor Potential Difference question
- Tyler R
- · Replies 9 ·
Thermal Expansion: Finding common temperature (Ring/Sphere)
- paulie
- · Replies 5 ·
Russell Traction Apparatus: Find W & Traction Force
- Melissa Reyes
- · Replies 1 ·
Magnitude of charge with common Transparent tape
- FirstLanguageMath
- · Replies 18 ·
Intensity of light passing through 3 polarizers
- ilovejava
- · Replies 3 ·
Energy of neutron in fission reaction
- Magnetic Boy
- · Replies 15 ·
What forces are acting on the rotating mass and platform in this experiment?
- doggydan42
- · Replies 2 ·
Rotational motion down an incline (ring/hoop)
- floraha
- · Replies 3 ·
Sliding blocks and a string problem
- Anatalbo
- · Replies 1 ·
Normal forces for small car performing a vertical loop
- Anatalbo
- · Replies 4 ·
Pendulum velocity using energy forumula
- Garrit
- · Replies 4 ·
Calculating Sound Intensity and Pressure Variation at a Distance
- Ian Baughman
- · Replies 4 ·
Relations between torque for system of pulleys
- BeeKay
- · Replies 1 ·
A mass is free to move on a horizontal frictionless surface
- physicsdude101
- · Replies 10 ·
Centre of gravity, centre of buoyancy (image)
- Poetria
- · Replies 2 ·
How Do You Solve a Double Atwood Machine Problem with Unequal Masses?
- dsfrankl
- · Replies 1 ·
Is the Young's Modulus Equation Homogeneous?
- Frozenblaze1
- · Replies 7 ·
How can we improve the performance of our mousetrap racecar?
- Cheesycheese213
- · Replies 1 ·
Problem about measurement and probability of energy
- BREAD
- · Replies 1 ·
"Calculating Work, Energy & Speed of Block on Spring
- Alex126
- · Replies 10 ·
A pulley of mass m using conservation of energy
- physicsdude101
- · Replies 13 ·
How to solve a simple elastic collision problem?
- Eclair_de_XII
- · Replies 8 ·
Conservation of momentum - Vertical spring
- danielbaker453
- · Replies 24 ·
Finding magnitude and direction of an electric field
- fishturtle1
- · Replies 1 ·
Archived Momentum science experiment help
- Illumination
- · Replies 2 ·
Archived Atwood Machine, I determining position of the masses.
- chickenman444
- · Replies 7 ·
Solving for RMS current of a resistor, help?
- clamatoman
- · Replies 6 ·
Angular momentum for a shrunken Earth
- hndalama
- · Replies 11 ·
Volume of water required to cool thermal/nuclear plants?
- kokodile
- · Replies 3 ·
A bead rests at the top of a fixed, frictionless hoop.
- physicsdude101
- · Replies 44 ·
Proton trajectory grazing a charged sphere
- timetraveller123
- · Replies 8 ·
Prove that the period of a SHM is 2pi*sqrt(m/k)
- ItsTheSebbe
- · Replies 3 ·
Is my solution for Kirchoff's Rules Problem correct?
- Kant Destroyer
- · Replies 2 ·
Block on Spring SHM, Finding angular frequency
- SadDan
- · Replies 3 ·
How Does the Angle Affect the Height and Speed of a Toy Car on a Track?
- Supremetheking
- · Replies 2 ·
Velocity Charged Particle between Parallel Plates
- ItsTheSebbe
- · Replies 6 ·
Calculating the heat released in one part of an electrical network?
- Amar
- · Replies 3 ·
Action-Reaction Force for external forces
- Aryan Andaleeb
- · Replies 15 ·
The relationship of the current before and after a change.
- Asmaa Mohammad
- · Replies 16 ·
Voltage & Current & Push & Force & Potential
- Barclay
- · Replies 5 ·
Newton's Second Law: Car and Rock Problem
- aatari
- · Replies 4 ·
A particle of mass m is initially at rest
- Calpalned
- · Replies 9 ·
Question regarding finding mass given a weight and gravity
- edgarpokemon
- · Replies 7 ·
Force of a block on an incline above a horizontal
- TheFlemster
- · Replies 10 ·
Change of Variables Legendre's Equation
- Crush1986
- · Replies 5 ·
Determine the angular momentum in polar coordinates
- welssen
- · Replies 4 ·
Sound & Music, Mass on a spring
- Torrie
- · Replies 10 ·
Sound & Music, String Frequency
- Torrie
- · Replies 3 ·
Magnetic Flux Through a Square Loop
- ilovejava
- · Replies 5 ·
Equation to calculate absorbed dose of radiation?
- Littlegirloud
- · Replies 3 ·
Ranking brightness of lightbulbs in a circuit
- ikihi
- · Replies 3 ·
Kinetic energy of plate tectonics problem
- hndalama
- · Replies 3 ·
How much stored energy do the plates have?
- ikihi
- · Replies 1 ·
Understanding Moment and Center of Gravity in One Dimension
- hndalama
- · Replies 8 ·
Why Is the Number of Nucleons in Earth Incorrect?
- hndalama
- · Replies 2 ·
Which Equations Apply When a Dielectric is Inserted into a Live Capacitor?
- WWCY
- · Replies 7 ·
Kinetic Theory - Mass on a piston
- danielbaker453
- · Replies 11 ·
Final temperature real gas behaving ideally
- Logan McEntire
- · Replies 2 ·
Archived Simple Harmonic Motion - Spring-Pendulum-Mass System
- cpin11
- · Replies 2 ·
Archived Simple pendulum problem with only velocity and angle known
- mmoadi
- · Replies 2 ·
Archived Pendulum Motion (Simple Harmonic Motion)
- Gotejjeken
- · Replies 1 ·
What is the Electric Field rule?
- grandpa2390
- · Replies 8 ·
Normalize Hydrogen Wavefunction
- Nacho Verdugo
- · Replies 7 ·
Spring problem using work energy theorem
- Garrit
- · Replies 5 ·
Gauss' Law -- Clarification about using the equation please
- grandpa2390
- · Replies 1 ·
Capacitor with uniform space charge between them
- rohanlol7
- · Replies 7 ·
Electric dipole in Uniform Electric Field (3D)
- Arman777
- · Replies 30 ·
How Does a Cycloidal Path Ensure Isochronous Oscillations in a Pendulum?
- Vitani11
- · Replies 5 ·