Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How to tell the difference between reversible and irreversible process
- PhyIsOhSoHard
- · Replies 5 ·
Archimedes Principle Problem: Floating Object
- AMacias2008
- · Replies 2 ·
Vectors and Components-Part Two
- Medgirl314
- · Replies 20 ·
Calculating the change in entropy, did I calculate correctly?
- PhyIsOhSoHard
- · Replies 1 ·
Probability of counts from the counting rate of a radioactive sample?
- carnivalcougar
- · Replies 3 ·
How Does a Spring's Work Relate to Its Stretch and Constants?
- uestions
- · Replies 3 ·
What Happens When a Capacitor Charges Another Capacitor?
- physicsboy1
- · Replies 3 ·
The continuity equation in electromagnetism
- physiks
- · Replies 13 ·
EMF in a square loop due to magnetic field from an infinite wire
- Loopas
- · Replies 10 ·
Electric circuit & missing resistance/voltage
- pebbles3
- · Replies 4 ·
Change in gravitational potential energy for a slender
- zeralda21
- · Replies 3 ·
Conservation of mechanical energy question
- jgray
- · Replies 1 ·
The Hot Big Bang Model and supporting evidence
- cakeislife
- · Replies 1 ·
Torque: Find Length of Moment Arm & Calculate Magnitude/Sign
- negation
- · Replies 5 ·
Magnetic field of a wire current surrounded by an aluminum tube
- FishStik
- · Replies 3 ·
How Do You Calculate the Angular Momentum of a Rotating Bat?
- Exustior
- · Replies 2 ·
Does Constant Engine Power Guarantee Constant Acceleration?
- jim_ringo
- · Replies 9 ·
Mass attenuation problem, protecting the lunar base against radiation?
- carnivalcougar
- · Replies 4 ·
De Broglie Wavelength Thought Problem
- FaraDazed
- · Replies 6 ·
How Do You Calculate R and C for a Series Impedance of 500∠-36.1° at 10kHz?
- zealeth
- · Replies 1 ·
Amount of energy lost to friction due to change in rotational inertia
- negation
- · Replies 1 ·
Electrical Charge Distribution on a Metal Teapot
- 16Candles
- · Replies 2 ·
How Does a Variable Air-Filled Capacitor Achieve Maximum Capacitance?
- karokr94
- · Replies 5 ·
Different conversion for angular momentum
- negation
- · Replies 9 ·
Chemical potential for van de Waarls gas
- Dassinia
- · Replies 1 ·
Einsteinian Time vs Newtonian Time
- seeldoger47
- · Replies 2 ·
Calculating Efficiency of an Engine with Moving Piston
- edanzig
- · Replies 1 ·
Given a change in internal energy, how can I find the temperature
- mp0295
- · Replies 1 ·
Vectors and Components-Part Three
- Medgirl314
- · Replies 28 ·
Is Work Meant to Be Positive and Heat Negative During Ethanol-Water Mixing?
- AXidenT
- · Replies 2 ·
Angular Momentum/Rolling Multiple Choice
- pietastesgood
- · Replies 9 ·
Find relativistic momentum of electron given kinetic energy.
- oddjobmj
- · Replies 6 ·
Three girls pull a sled. Determine the acceleration.
- Natko
- · Replies 5 ·
Calculating velocity of water flow form tap
- jannx3
- · Replies 2 ·
Ratio PV/RT dieterici's equation
- Dassinia
- · Replies 4 ·
Finding velocity of particles in a uniform magnetic field
- ILstudent122
- · Replies 2 ·
Charged particle entering velocity selector
- britt
- · Replies 1 ·
Conservation of Four-Momentum in Inertial Frames
- brainpushups
- · Replies 4 ·
Charged straight wire Electrostatics
- Lucky7
- · Replies 4 ·
How to Model Projectile Motion with Air Resistance?
- Maxo
- · Replies 22 ·
How Fast Do EM Waves Travel in Ferromagnetic Materials?
- FaraDazed
- · Replies 2 ·
Light Refraction Problem - Snells Law
- FaraDazed
- · Replies 2 ·
Odd constraint problem: Reflected and Transmitted Power of String
- N00813
- · Replies 8 ·
Damped simple harmonic motion experiment and questions?
- cakeislife
- · Replies 8 ·
30,000 fleas jumping off an elephant
- owtu
- · Replies 5 ·
Acceleration of Protons in Magnetic Field and Induced Electric Field
- cesaravila
- · Replies 1 ·
Forces & Friction: Calculating Normal Force & Horizontal Force
- santoki
- · Replies 3 ·
Heat Transfer Problem: Finding Temperature Difference in Insulated System
- LHC_23
- · Replies 1 ·
Newton's Laws of Motion Problem
- rajumahtora
- · Replies 2 ·
Forces - A block slides upward on a rough, vertical wall
- santoki
- · Replies 16 ·
Angular Acceleration and Radius
- Kavorka
- · Replies 3 ·
Harmonic Motion of Oscillating Particle
- MD_Programmer
- · Replies 1 ·
Finding Sliding Distance SS = 5.068 m
- bj5110
- · Replies 3 ·
How Would a Halved Sun Mass Alter Earth's Orbit?
- AdkinsJr
- · Replies 2 ·
Force of friction on a curved road
- stunner5000pt
- · Replies 1 ·
Understanding Vector Fields and Their Properties: Analyzing a Homework Statement
- kritisk
- · Replies 1 ·
Why Does a Bicycle Wheel's Angular Momentum Point West When Traveling North?
- edanzig
- · Replies 3 ·
Semiconductor diode (graph quesiton)
- darksyesider
- · Replies 1 ·
Did I do this question correctly? (Loop Rule Q)
- Potential123
- · Replies 1 ·
Linear/angular Momentum / tripping / conservation
- timarli
- · Replies 3 ·
Determine magnetic field of a bar magnet
- britt
- · Replies 1 ·
Induced EMF in metal loop near RC circuit
- neemer
- · Replies 6 ·
Find Current in a Solenoid Given Magnetic Field and Velocity
- elitepro
- · Replies 3 ·
Car changing speed around a corner - find tangential and radial accel
- Phys121VIU
- · Replies 4 ·
Using the Doppler formula to find radial speed of a star
- owengmcdonnel
- · Replies 1 ·
How Far Does a Stone Travel in 2 Seconds When Thrown Downward?
- nouf33
- · Replies 1 ·
High resistance or low resistance for induction cooktops?
- Nerkiot
- · Replies 1 ·
Calculating rate of change of momentum for a package
- EmSeeSquared
- · Replies 1 ·
Calculating Capacitance Between Parallel Wires & Plane
- Miike012
- · Replies 8 ·
Calculate how far the spring is stretched from its position?
- andreyp27
- · Replies 8 ·
Intepretation of question only
- negation
- · Replies 4 ·
Equilibrium of a Rigid Body: Finding Unknown Mass on a Lever
- Mookie
- · Replies 1 ·
Kinematics Word Problem - Projectile Fired at a Stationary Vehicle
- Wellesley1
- · Replies 2 ·
Understanding Why No Torque is Produced at O
- princejan7
- · Replies 1 ·
How High is the Cliff if a Rock Splashes Water in 3 Seconds?
- Jerry
- · Replies 3 ·
Turnable Angular Frequency, Torque,Inertia
- upandup
- · Replies 5 ·
Why Does Hooke's Law Consider Only 150N in a Two-Person Pull Test?
- Gandor481
- · Replies 1 ·
Understanding Forces: Airplane in a Loop - Speed at Top
- EEintraining
- · Replies 17 ·
Centre of gravity for multiple objects
- aab234
- · Replies 5 ·
Where do I place the bearings for a stable inclined rotating drum?
- Sook
- · Replies 3 ·
Terminal voltage and current flow
- narutoish
- · Replies 1 ·
AC current and incandescent bulbs
- KozakDave
- · Replies 3 ·
Acceleration of Bar in Circuit with Magnetic Field
- Mysterious
- · Replies 5 ·
Solving Rotational Statics: Force Left Support Exerts on Beam
- ryanmk54
- · Replies 2 ·
Work done on a mass by an ideal machine
- pinokicake
- · Replies 21 ·
Velocity - String(Pulley) constraints
- phoenixXL
- · Replies 13 ·
Magnetic moment of singly ionized helium
- Emspak
- · Replies 4 ·
Acceleration on a pulley system with 3 blocks
- mackeis
- · Replies 3 ·
Magnetic Field of a point charge
- majormaaz
- · Replies 1 ·
Solve RLC Circuit Problem: Half Power at Resonance
- Saitama
- · Replies 2 ·
Equivalent resistance, using node voltage analysis
- yaro99
- · Replies 11 ·
Direction of Electric Field in a Changing Magnetic Field
- Queequeg
- · Replies 2 ·
Thin Lens Equation: Nearsighted
- blue_lilly
- · Replies 1 ·
Show that the two wave functions are eigenfunction
- gfxroad
- · Replies 1 ·
Why is the answer C for electric field and potential?
- delsoo
- · Replies 4 ·
Bridging connection between Newton's second law and Work
- negation
- · Replies 4 ·
How much work is done on the ice block?
- Richober
- · Replies 1 ·
Speed of satellite in geosynchronous orbit
- glennib
- · Replies 2 ·
Silver Atom X-Ray Spectra: Kα & L X-Rays?
- utkarshakash
- · Replies 5 ·
Understanding Work: Kinetic vs. Potential Energy
- dragon-kazooie
- · Replies 31 ·