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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What is the equation for M and why is there a T?
- yolo123
- · Replies 7 ·
How Does Work Relate to Changes in Kinetic and Potential Energy?
- yolo123
- · Replies 8 ·
Oscillation (particle movement)
- Schulze
- · Replies 5 ·
Two-box system: minimum force and acceleration to prevent sliding
- yolo123
- · Replies 7 ·
Solve 15=35sinΘ Equation with No Calculator
- Zashmar
- · Replies 2 ·
What Is the Impact Speed of a Meteoroid Approaching Earth?
- MEwill
- · Replies 3 ·
Entropy and Carnot refrigerators
- CAF123
- · Replies 20 ·
Collisions in rotational dynamics
- physiks
- · Replies 1 ·
Angular momentum of a rod rotating about an axis
- zeralda21
- · Replies 5 ·
Sphere rolling down an incline plane pulling a rope off a cylinder
- leeone
- · Replies 18 ·
Understanding Lenz' Law as it applies to a magnet falling in a tube
- bob12321
- · Replies 1 ·
Phase angle between peak source voltage and peak voltage across RLC?
- Loopas
- · Replies 8 ·
Power dissipated in an RL circuit
- pengumon
- · Replies 2 ·
Calculating Tension in an Inclined Plane Problem
- BrainMan
- · Replies 2 ·
When does a point 5m from the source first reach phase 180°?
- utkarshakash
- · Replies 10 ·
Instantaneous velocity and a catapult
- chikis
- · Replies 16 ·
Resistance between two points in complex circuit
- Anonimas
- · Replies 2 ·
How can I solve a complex equation without a good calculator?
- Zashmar
- · Replies 1 ·
Are Units for Phase Calculations in Wave Problems Accurately Applied?
- MathewsMD
- · Replies 3 ·
Water flowing through an eavestrough
- TheKShaugh
- · Replies 6 ·
Soap bubbles sticking to each other
- utkarshakash
- · Replies 5 ·
Strain energy in a tapered rod under torsion
- theBEAST
- · Replies 4 ·
Laplace in electromagnetics(voltages are different in conductor?)
- baby_1
- · Replies 4 ·
Spring and gravitational energies (Simple harmonic motion)
- ichivictus
- · Replies 3 ·
Torque Equilibrium to find center of mass.
- MedChill
- · Replies 2 ·
Conservation laws - Ball hitting a rod about its end
- mintsnapple
- · Replies 3 ·
Coupled Oscillation attached at one end ?
- GodPlaysDice
- · Replies 1 ·
USAPhO 2014 F=ma exam #14, (rotational dynamics)
- Agrasin
- · Replies 1 ·
Why Does a Car's Front Lift When Accelerating?
- Kavorka
- · Replies 6 ·
Circuit problems with capacitors and parallel emf sources
- MathewsMD
- · Replies 12 ·
Charged particle moving under electric field
- utkarshakash
- · Replies 30 ·
Adding a 3rd Source to a 2 Source Interference Pattern
- kosovo dave
- · Replies 4 ·
Displacement reference and phase constant in SHM equations
- ThomasMagnus
- · Replies 8 ·
How to Draw Force Diagrams for Suspended Objects and Equilibrium Situations
- santoki
- · Replies 6 ·
Thermodynamics - Ideal gas expansion
- Chase11
- · Replies 3 ·
Gravitaional attraction between two objects
- EliteCodexer
- · Replies 7 ·
How Is the Moment of Inertia Calculated for a Wheel Composed of Welded Rods?
- leeone
- · Replies 6 ·
Photoelectric Detector and Energy Measurements
- bravellama
- · Replies 1 ·
Conservation of Angular Momentum Conceptual Question
- leeone
- · Replies 5 ·
Plotting Stopping Voltage vs. Frequency
- bravellama
- · Replies 2 ·
Objects in equilibrium hinged platform with cable problem
- BrainMan
- · Replies 4 ·
Vertically polarized light from a hene laser passes through a linear
- tizio
- · Replies 6 ·
Condition for Simple Harmonic Motion
- utkarshakash
- · Replies 2 ·
Does Gravitational Potential Energy Decrease on Collision?
- utkarshakash
- · Replies 3 ·
I don't distinguish gravity and centripetal acceleration
- mcastillo356
- · Replies 5 ·
Finding velocities from force vs distance graph of collision
- elements
- · Replies 4 ·
What is the weight of the sled?
- bennyq
- · Replies 5 ·
Impact and collision - having problems
- overpower
- · Replies 12 ·
Does a rotating charged ring constitute an electric current?
- Tanya Sharma
- · Replies 12 ·
A gravitation problem with two masses
- toothpaste666
- · Replies 16 ·
Elastic collision between two bodies
- lookalike
- · Replies 2 ·
Pendulum/Circular Motion Problem
- Jay0078
- · Replies 20 ·
Why does my force equation give wrong braking force for car with counterweight?
- yolo123
- · Replies 9 ·
Conducting loop placed in magnetic field
- utkarshakash
- · Replies 13 ·
How to Calculate Spring Constant and Weight from Oscillation Frequency?
- Kavorka
- · Replies 2 ·
Finding total electric flux through a sphere
- bibo_dvd
- · Replies 3 ·
Oil layer thickness for constructive interference at 590nm
- MyNameIsKhan
- · Replies 1 ·
Marble rolling down a frictionless track and up to height h2
- Kavorka
- · Replies 12 ·
Hoop with backspin - Conservation of Angular Momentum
- mintsnapple
- · Replies 1 ·
Tension in the string of a rotating, massive pulley
- raving_lunatic
- · Replies 3 ·
Optimal angle for pulling a crate with friction
- yolo123
- · Replies 8 ·
Calculating Earth's Orbital Velocity from Varying Distance to the Sun
- toothpaste666
- · Replies 42 ·
Height of ball bounce with air resistance
- ajuric
- · Replies 1 ·
Finding the tension in terms of mg
- yugeci
- · Replies 13 ·
Charge on capacitor connected between spheres
- Saitama
- · Replies 8 ·
Problem Solving - Calculate the mass of steam condensed
- seongwei
- · Replies 6 ·
Force between two current-carrying loops
- fogvajarash
- · Replies 1 ·
What is the Distance d in Snell's Law and the Pythagorean Theorem?
- h20proof
- · Replies 5 ·
How to Draw a Force Diagram for an Object Suspended by Strings?
- santoki
- · Replies 2 ·
Two capacitors are connected in parallel
- TwinCamGTS
- · Replies 5 ·
Simple pendulum with initial velocity
- MathewsMD
- · Replies 2 ·
Magnetic field and current cause a force
- MathewsMD
- · Replies 6 ·
How do I calculate the time it takes to discharge a capacitor?
- puhdanks
- · Replies 4 ·
Charge distribution between two spherical hollow conductors.
- sankarshana016
- · Replies 5 ·
Finding Refraction Angle and Wavelength in Water for Sodium Light?
- h20proof
- · Replies 2 ·
How Do You Calculate Ionization Energies for Different Shells in X-ray Spectra?
- NewSoul
- · Replies 5 ·
Moment of Inertia about axis through body diagonal of a Cuboid
- Rococo
- · Replies 8 ·
How Do You Calculate Triangle Peak Equations in MATLAB?
- Spoolx
- · Replies 4 ·
What Angle Increases Cloud Intensity Ratio to Three Times Normal?
- ghostops
- · Replies 1 ·
How Do Tension and Length Affect Fundamental Vibrations on a String?
- bennyq
- · Replies 1 ·
Similarities and differences between electron and muon
- LotusTK
- · Replies 8 ·
Mutual Inductance of RC Circuit on a Small Coil
- Gwozdzilla
- · Replies 2 ·
Force - gondola car suspended between 2 cables
- santoki
- · Replies 1 ·
Force - finding tension in string
- santoki
- · Replies 1 ·
Bullet Into Wood: Heat or Energy Loss?
- yolo123
- · Replies 1 ·
Suspended plank equilibrium and particle angular momentum
- Kavorka
- · Replies 4 ·
How Long to Heat 125L Water to 60C with 2kW Heater and 150W Loss?
- GoodOldLimbo
- · Replies 3 ·
Find output voltage as a function of time
- zealeth
- · Replies 9 ·
Energy changes of a ball thrown up
- SunshineCat
- · Replies 1 ·
Minimum capacity rate ratio of a heat exchanger
- theBEAST
- · Replies 2 ·
Path length difference and Diffraction
- fogvajarash
- · Replies 2 ·
What is the Mechanical Advantage of the Engineer's Machine?
- lovelyrwwr
- · Replies 7 ·
Mass of planet expressed as multiple of earth's mass
- toothpaste666
- · Replies 3 ·
Rigid Body Rotation: Proving/Disproving \vec{R'} Direction
- Saladsamurai
- · Replies 1 ·
Special Relativity, light down a rocket
- CAF123
- · Replies 64 ·
What is the Resistance of an Electric Iron with a Label of 240V, 2kW?
- ps3stephen
- · Replies 2 ·
Calculating Mass of Soil Scooped in 0.009 m3
- ExoP
- · Replies 4 ·
Velocity of a bar on parallel conducting rails
- abear247
- · Replies 6 ·
[Statistical Physics] No. of dice rolls so prob of getting a 6 is >90%
- Flucky
- · Replies 3 ·