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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Capacitor and Surface Charge Density Question
- cwill53
- · Replies 15 ·
Rod in equilibrium, and find its angle to the vertical plane
- jmao15
- · Replies 1 ·
Question about the Peak and Average Power of a Laser
- Irishdoug
- · Replies 3 ·
Which lamp is dimmed in the circuit?
- Pouyan
- · Replies 18 ·
Resultant of two forces in two different situations
- GiriBang
- · Replies 4 ·
Question about how to calculate the Resultant Force at this point
- mishelhad
- · Replies 5 ·
Tension developed in a charged ring
- Hamiltonian
- · Replies 2 ·
What Formula Do I Need for This Optics Problem?
- ohhwhat
- · Replies 27 ·
Determining the north and south pole of a solenoid
- ellieee
- · Replies 13 ·
Deflection of light passing the Sun
- Office_Shredder
- · Replies 3 ·
Finding the magnitude of the moment on a pipe wrench
- yazz912
- · Replies 21 ·
Solving the Parabolic Motion Problem: A Sphere with Unusual Weight and Size
- Lord_Biscotto
- · Replies 2 ·
Help calculating the current from the density and a rotating frame
- liran avraham
- · Replies 2 ·
Is the Physics in the Avengers' Shield Collision Scene Accurate?
- Travis Enigma
- · Replies 6 ·
Can Maglev Trains Be Used for Exercise?
- paulcaimp
- · Replies 10 ·
An electron enters a magnetic field
- Dominic90
- · Replies 5 ·
Problems about magnetic field, electromotive force, induced current
- Dominic90
- · Replies 1 ·
How do mass and radius affect gravitational pull on planets?
- momoneedsphysicshelp
- · Replies 6 ·
Hydrostatic Equilibrium Problem Involving a Cube and two Liquids
- ViktorVask
- · Replies 34 ·
Question about a simple model for for back EMF
- FranzDiCoccio
- · Replies 8 ·
Gravity and Orbital Velocity: Understanding a Common Misconception
- momoneedsphysicshelp
- · Replies 7 ·
How Does a Positron's Kinetic Energy Change with Magnetic Field Strength?
- elitepro
- · Replies 4 ·
Relationship between closing a switch and the total battery current
- kbrockway2021
- · Replies 2 ·
Static friction coefficient for a crate in the back of a truck
- purple4
- · Replies 6 ·
Why do monocrystalline solar cells have rounded/cropped edges?
- cemtu
- · Replies 2 ·
The attractive gravitational forces between two people separated by 1.5 meters
- robax25
- · Replies 12 ·
Electric Field and Continuous Charge Distribution
- cwill53
- · Replies 14 ·
Calculating the Solid Angle of a Nebula from Earth
- agnimusayoti
- · Replies 5 ·
Current generated by plasma of uneven density in a Magnetic Field
- phantomvommand
- · Replies 2 ·
Refraction of light question -- Flintglass submerged in oil
- rssvn
- · Replies 19 ·
Does "internal force" have 2 meanings in physics?
- pkc111
- · Replies 16 ·
Why is the Velocity equal to joules per kilogram?
- grandpa2390
- · Replies 39 ·
A ball climbing a ramp while "rolling the wrong way"
- FranzDiCoccio
- · Replies 32 ·
Swimming to and fro across a river
- brotherbobby
- · Replies 5 ·
What exactly does the Work-Energy theorem say?
- pkc111
- · Replies 14 ·
What is the Correct Distance with Force from Both Sides?
- TheMath_boy
- · Replies 5 ·
Gravity and Energy -- Two masses above two different planets
- jstelpend
- · Replies 1 ·
Area Under Frequency versus Time Curve meaning?
- GregB777
- · Replies 8 ·
Practice Problem about the Energy of a Pendulum
- stephy
- · Replies 3 ·
Vaporization latent heat vs boiling point
- yecko
- · Replies 2 ·
Are there 2 correct answers to this transformer homework problem?
- pkc111
- · Replies 33 ·
Understanding the Differences Between Bose and Classical Gases
- Kaguro
- · Replies 2 ·
Conservation of Linear Momentum of Rigid Body
- Uchida
- · Replies 3 ·
Moment of inertia of a disc using rods as differential elements
- Hamiltonian
- · Replies 8 ·
Coulomb's Law -- dielectric problem
- Tanya Sharma
- · Replies 28 ·
Using Lorentz Force to derive V = E/B
- phantomvommand
- · Replies 8 ·
EM fields and Current between 2 charged cylinders
- phantomvommand
- · Replies 10 ·
Machine Dynamics: Manual Air Pump Calculation (please check my answer)
- JamesBennettBeta
- · Replies 4 ·
A Graph analysis problem to find when the acceleration is zero
- uranium92
- · Replies 18 ·
Intensity of central maxima of crystal diffraction
- phantomvommand
- · Replies 3 ·
Finding the gain coefficient at line centre for a HeNe Laser
- MarkNormand99
- · Replies 4 ·
How do you calculate the impedance of the primary circuit?
- Andrei0408
- · Replies 1 ·
How is the Relativity Formula Proven for an Electron in an Electric Field?
- Samkiwi
- · Replies 25 ·
Calculate Ip: 9V, 120V Transformer Equation
- tanaygupta2000
- · Replies 8 ·
Understanding the Forces Behind Part B of the Graph
- phantomvommand
- · Replies 10 ·
Superposition of two simple harmonic motion
- Krokodrile
- · Replies 4 ·
What can I investigate regarding the mechanics of bikes?
- SwizzFizzicks
- · Replies 18 ·
How Earth's rotation is changed by the change in inertia when you get out of bed
- robax25
- · Replies 18 ·
Binding energy per nucleon of the nucleus
- leminn
- · Replies 10 ·
Calculating Track Acceleration Due to Gravity
- robax25
- · Replies 24 ·
Restoring force on a ball connected to two rubber bands
- EnricoHendro
- · Replies 11 ·
Why is My Polarized Plate Field Calculation Incorrect?
- LCSphysicist
- · Replies 1 ·
Where Will a Jumper Land on a Moving Train Around a Bend?
- shk
- · Replies 26 ·
Deriving and Verifying the Relativity Formula for Electron Speed
- Samkiwi
- · Replies 2 ·
Electric Force: Equilateral Triangle
- Sirmeris
- · Replies 5 ·
Point charge near charged plate
- swinfen
- · Replies 6 ·
Electric fields of charged plates
- swinfen
- · Replies 6 ·
Problem on Pressure due to Surface tension
- phantomvommand
- · Replies 1 ·
A query about this electrical circuit symbol
- ellieee
- · Replies 2 ·
Specific heat capacity & heat capacity
- ellieee
- · Replies 6 ·
Momentum of a ball bouncing off of the floor
- FireKyuubi
- · Replies 13 ·
SR - Getting Zero Spatial Displacement
- A_Stone
- · Replies 2 ·
Thermal energy transport via conduction
- ellieee
- · Replies 5 ·
Potential difference calculation
- ellieee
- · Replies 2 ·
The relativistic Doppler effect
- help I have 12 hours
- · Replies 5 ·
How do I calculate the ratio of forces between two conducting spheres?
- samcoelho
- · Replies 6 ·
Finding the tension of a support cable to balance the beam
- JohnTheGreat101
- · Replies 3 ·
Finding the depression and the tension of the string
- kaspis245
- · Replies 33 ·
Why is magnetic field half at the sides of a solenoid?
- phantomvommand
- · Replies 11 ·
Calculate the Mass of Ice cubes needed to cool a soft drink
- CyanPowder
- · Replies 10 ·
Deriving electric and vector potential
- DirecSa
- · Replies 2 ·
Oblique shock waves: how to find the wedge angle for trailing shock?
- Master1022
- · Replies 1 ·
Is My Delta to Wye Conversion Calculation Correct?
- Istiak
- · Replies 5 ·
A steel shuttle is pulled along a rail, what is its initial acceleration?
- potatotimer
- · Replies 3 ·
Pulley system -- Calculate the mass that balances this pulley system
- FFTB
- · Replies 2 ·
Charge on two spheres related to Earthing
- songoku
- · Replies 17 ·
Need help with Finding absolute magnitude
- Michael c17
- · Replies 4 ·
Damped Oscillatory Motion with Varying Bump Timing for Control
- Adrian Simons
- · Replies 13 ·
Balancing Nuclear Equations: Mass & Atomic Number Confusion
- ayans2495
- · Replies 2 ·
Relative Humidity and Temperature Changes when adding Heat
- john ryan
- · Replies 11 ·
Would particle P be under non-unform circular motion?
- vcsharp2003
- · Replies 29 ·
Calculating F, V and C: Why Can It Not Be Obtained This Way?
- hidemi
- · Replies 4 ·
Iron block dropped into a container of water sitting on a scale
- Kate_12
- · Replies 12 ·
Q of radiating electron according to classical theory
- mbigras
- · Replies 10 ·
Work and Energy on a Slope - How Does a Block Move Up with Zero Net Work?
- JackyCheukKi
- · Replies 3 ·
Find the gravitational field strength of planet X
- ellieee
- · Replies 10 ·
Problem on Diffraction Grating and Laser Crystallography
- phantomvommand
- · Replies 10 ·
Explaining a Physics Formula in Non-Physics Terms: Answer B
- hidemi
- · Replies 2 ·
Location of the particles when 1.5 periods of a sound wave have passed
- ellieee
- · Replies 3 ·
Symmetry & Field of an Infinite uniformly charged plane sheet
- Shreya
- · Replies 2 ·