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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Electrostatics: Finding force experienced by charge
- Sajid Nabi
- · Replies 4 ·
Calculate the equivalent resistance in the Figure
- Kelsi_Jade
- · Replies 21 ·
Energy to deliver 3000kg satellite into 300km orbit
- charlie05
- · Replies 37 ·
Two-Dimensional Elastic Collision of Equal Masses
- flamespirit919
- · Replies 9 ·
Thomas Young's Double-Slit Experiment Problems
- snake3001
- · Replies 1 ·
There are two charges with charge q and mass m
- Abhishek Das
- · Replies 3 ·
Angular Acceleration of Cord Problem
- RoyalFlush100
- · Replies 10 ·
Time period of a block hanging from a pulley
- randomgamernerd
- · Replies 6 ·
What is the electric field in a circular region using Faraday's law?
- Ashley1nOnly
- · Replies 4 ·
Potential of a uniformly polarized sphere
- Dustgil
- · Replies 5 ·
Carnot Engine cycle on PV Diagram
- Sorelle
- · Replies 5 ·
Solving for Velocity After Two Objects Collide
- EthanVandals
- · Replies 5 ·
Energy and Voltage of Capacitor Circuits
- Jimmy87
- · Replies 5 ·
Possible webpage title: How does energy factor into the decay of particles?
- FelaKuti
- · Replies 2 ·
Diffraction Grating - all visible light?
- clamatoman
- · Replies 2 ·
How to Determine Plate Configuration in Capacitance Calculations?
- Arman777
- · Replies 16 ·
The slowing down of a Farady disc
- Toby_phys
- · Replies 7 ·
Constrained Plane of Motion Problem
- RoyalFlush100
- · Replies 9 ·
Pressure of a sting of mosquito
- kirya27
- · Replies 3 ·
Racing car accelerating from 28 km/h to 102 km/h over 297m
- jake walsh
- · Replies 18 ·
Which operation best represents xyzzy algorithm efficiency?
- emeraldskye177
- · Replies 8 ·
Two dimensional momentum problem
- WherE mE weeD
- · Replies 20 ·
Archived Thermal Diffusion with Heat Source
- rabbit44
- · Replies 1 ·
What causes a point charge to move in an electric field?
- randomgamernerd
- · Replies 17 ·
Finding the current through the battery
- Vanessa Avila
- · Replies 20 ·
Is O(g) equivalent to Ω(f) for function growth?
- emeraldskye177
- · Replies 9 ·
Diffraction Grating and Visible Light
- KennedYeti
- · Replies 8 ·
How Do Tension Forces Distribute in a System with a Diagonal Rope?
- adam3music
- · Replies 2 ·
How Does Spring Compression Affect Kinetic Energy and Velocity of a Block?
- EthanVandals
- · Replies 14 ·
Finding Optimal Fixed Resistor for Potential Divider Circuit
- Jimmy87
- · Replies 45 ·
Work done on an object in a spring pendulum
- Faye716
- · Replies 4 ·
How Is Terminal Velocity Achieved by a Ring Falling Through a Magnetic Field?
- FelaKuti
- · Replies 9 ·
Chain Sliding on a Pulley: Acceleration and Force Analysis
- Eugen
- · Replies 6 ·
Algebraic Explanation of Image Formation in Convex Lenses
- Matt M
- · Replies 1 ·
Phase Shift of two sinusoidal waves
- Const@ntine
- · Replies 6 ·
Why is the tension force equal to friction force
- mooguy
- · Replies 9 ·
What is the Polarity of Charges in a Millikan Type Experiment?
- randomgamernerd
- · Replies 8 ·
Finding Nodes in a Standing Wave at 800 Hz
- Const@ntine
- · Replies 4 ·
Force needed to hold a piston after moving 0.4 m in a cylinder
- Adrian379
- · Replies 8 ·
Leidenfrost effect at thermodynamic equilibrium
- digogalvao
- · Replies 2 ·
How long does a boat sink through a 20 mm hole in the bottom?
- charlie05
- · Replies 65 ·
Archived Potential Energy and Conservation Of Energy Atwood's Machine
- godkills
- · Replies 2 ·
Pot falls down toward a man: How long before we warn him?
- Const@ntine
- · Replies 7 ·
What is the relationship between solar radiation intensity and lunar phases?
- charlie05
- · Replies 11 ·
Simple RMS velocity question, what's wrong with my answer?
- couchpotato
- · Replies 2 ·
What is the Minimum Mass for a Rotating Neutron Star?
- Kyal_Sharpe
- · Replies 6 ·
Two parallel wires connected to equal alternating currents
- FelaKuti
- · Replies 2 ·
Calculating Heat Exchange for a Water Pump
- rachel6589
- · Replies 1 ·
Stern-Gerlach experiment Problem
- BREAD
- · Replies 11 ·
Heating the inside of a box thanks to a lamp
- Rajo Yajo
- · Replies 8 ·
Projectile motion (time cut in half)
- reshmaji
- · Replies 3 ·
Thermodynamics and thermometers (Thermistor)
- Faiq
- · Replies 19 ·
Time dependent expectation value problems
- BREAD
- · Replies 19 ·
Two cars moving towards each other - bullets fired
- Isobel
- · Replies 6 ·
Coefficient of friction from pendulum bob hitting a box
- HarshK
- · Replies 34 ·
What is the frequency of a longitudinal wave in terms of distance and speed?
- Kyros
- · Replies 2 ·
Source Free RL circuit confusion
- MagnificentLiver
- · Replies 3 ·
Archived Electron diffraction experiment: Miller indices slope calculation off by factor of 1.73
- bGODLESS
- · Replies 1 ·
Archived How Do You Calculate the Wavelength of an Electron with 1keV Kinetic Energy?
- ZedCar
- · Replies 3 ·
Why Isn't the Sum of Torques Zero in This Ladder Equilibrium Problem?
- Elias Waranoi
- · Replies 8 ·
Find loop radius and current via magnetic field?
- jlmccart03
- · Replies 5 ·
Solve Thermal Rad. Homework: Box Painted Black, 500 W Light
- Vector1962
- · Replies 11 ·
Projectile motion with initial azimuth angle on Earth's surface
- BorPetVlad
- · Replies 4 ·
Two Black Holes orbiting as a binary system
- FelaKuti
- · Replies 6 ·
Work done shaking an insulated copper vessel with water
- randomgamernerd
- · Replies 5 ·
Question based on Lenses -O level/gcse
- Wasif Shah
- · Replies 3 ·
How Is Torque Calculated on a Current-Carrying Loop in a Magnetic Field?
- DrIxn
- · Replies 7 ·
Find acceleration of a pulley system
- cantdisclosename
- · Replies 6 ·
Relationship between work and potential energy?
- carsof
- · Replies 1 ·
How to certify that the proper legth of light is zero
- DrHAO
- · Replies 2 ·
What are the errors in Young's Double Slit experiment?
- MPZ
- · Replies 2 ·
Motion of 4 charges positioned in a square shape
- Berker
- · Replies 2 ·
Center of mass on plank problem
- reshmaji
- · Replies 3 ·
Preventing Egg Smashing: Strategies for a Safe Landing
- zone32
- · Replies 2 ·
Calculating Magnetic Flux Change in Moving Coil Experiment
- Faiq
- · Replies 11 ·
Calculating Water Flow Using a Venturi Meter
- HethensEnd25
- · Replies 2 ·
Special relativity - transformation of angle
- Toby_phys
- · Replies 5 ·
Finding potential difference Vba from electric field line integral
- Arman777
- · Replies 12 ·
Why does the gravitational force decrease below the Earth's surface?
- Steven Hansel
- · Replies 10 ·
Velocity of a spacecraft at relativistic speed
- Huston
- · Replies 5 ·
Why constant emission rate over 40 days with a radioactive source
- Faiq
- · Replies 10 ·
What does 'with the vertical' mean in circular motion problems?
- ehf
- · Replies 4 ·
Voltage across switch in LR circuit as switch is opened?
- nikodym
- · Replies 1 ·
Pressure inside a balloon with surface tension
- charlie05
- · Replies 26 ·
Ship Bobbing in the Ocean (Frequency Problem)
- Seth Newman
- · Replies 5 ·
Derive formula using Conservation of Energy and Momentum
- Unicorns812877
- · Replies 4 ·
Finding the Phase Constant in a Mass/Spring System
- emilli
- · Replies 2 ·
Calculating Time Differences in GPS Signals: A Relativistic Approach
- Blue Kangaroo
- · Replies 1 ·
Magnetic Torque on Dipole; Oscillating Magnet question
- nbh
- · Replies 2 ·
Finding momentum of a photon/ Finding the mass of a object
- LionLieOn
- · Replies 8 ·
What is the lost volts in this circuit?
- Ellie4700
- · Replies 8 ·
RC Multiloop Circuits, Find Current at Specific Time
- D Nguyen
- · Replies 9 ·
Half life - Calculate the length of time
- Faiq
- · Replies 24 ·
Solve Image Charge Problem: No Quotes
- BREAD
- · Replies 2 ·
Negative Values of the Frictional Force?
- AilingLore21
- · Replies 29 ·
Why is distance the same in the 5th and 6th seconds of upward motion?
- NoahCygnus
- · Replies 12 ·
Compute the energy of the emitted alpha for Na20 decaying to an excited state
- llatosz
- · Replies 6 ·
Condition satisified when the body does not slide
- Eugen
- · Replies 4 ·
Sign of area element in spherical coordinates
- core1985
- · Replies 3 ·
Accelerating an electron from speed u1 to u2
- Alan Ezra
- · Replies 4 ·