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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Why does a uniformly charged sphere produce the same field as a point charge?
- Leo Liu
- · Replies 8 ·
Work Done By a Spring's Restoring Force
- rtareen
- · Replies 4 ·
Calculating Capacitance of Two Electrodes with Varying Distance
- StillAnotherDave
- · Replies 4 ·
Forces in three rods supporting a block
- IamVector
- · Replies 9 ·
Formula for calculating the wavelength of sound in interference
- HelpMeWithPhysics
- · Replies 10 ·
What does 'a distance L apart' mean?
- Special One
- · Replies 7 ·
Diference between cm^3 and cm^-3
- new90
- · Replies 4 ·
Is a mother carrying her baby doing work on the baby?
- kathrynisconfused
- · Replies 5 ·
Entropy and the Helmholtz Free Energy of a Mass-Piston System
- Pendleton
- · Replies 8 ·
About changes in a magnetic field
- bhaskarporey
- · Replies 1 ·
Heat Transfer - Radiation - Net heat transfer between two mirrors
- Master1022
- · Replies 2 ·
Calculating Moment of Inertia for a Curved Rod with Respect to a Specific Axis
- Iqish
- · Replies 1 ·
Fourier’s Law Of Heat Conduction (Window Pane)
- jisbon
- · Replies 17 ·
Quantum Physics (Electron in infinite deep quantum well)
- jisbon
- · Replies 7 ·
What Is the Interpretation of an Integral Equation with a Proportional Variable?
- Anti Hydrogen
- · Replies 3 ·
Box on a slanted plank with friction attached to a spring
- rakailee
- · Replies 5 ·
Simple Mechanics Problem -- Block connected to a wall by a rope
- domingoleung
- · Replies 5 ·
How to Calculate Bullet Velocity After Penetrating a Block
- domingoleung
- · Replies 6 ·
Cylinder rolling with a block inside it
- IamVector
- · Replies 6 ·
Will the displacement of a solid ball affect the water level?
- brotherbobby
- · Replies 7 ·
Electricity Problem: Solutions and Causes
- MrSmailes
- · Replies 1 ·
How can we find a galaxy's velocity from its redshift?
- Ellio
- · Replies 1 ·
Determining uncertainty in an experimental value of g
- tw336
- · Replies 9 ·
How do I find the mass of an object without k?
- swueettea
- · Replies 11 ·
Finding exercise problems to supplement Feynman Lectures on Physics
- new90
- · Replies 13 ·
Motor boat intercepting vessel A after 500 seconds
- gnits
- · Replies 3 ·
Slope and velocity problem (difficult)
- IamVector
- · Replies 25 ·
Maximum voltage that can be applied to DC circuit with resistors
- Sokolov
- · Replies 3 ·
Combine swimming and running to get to the final point the quickest
- IamVector
- · Replies 29 ·
Circular motion of a car on a banked road
- MIN JIN
- · Replies 14 ·
Zero Amplitude Damped Simple Harmonic Motion with k=0.7s^-1 and f=3Hz
- Timburton91
- · Replies 5 ·
Sticky card Application of Bernoulli / Pressure incorrect?
- Fuux
- · Replies 4 ·
Spring scale reading when jumping from 1 meter height
- r12214001
- · Replies 5 ·
Why can't we use Cartesian coordinates for the ant and rubber band problem?
- IamVector
- · Replies 16 ·
Finding the angular acceleration of a flywheel
- cpgp
- · Replies 14 ·
How wheel radius affects force needed to pedal a bicycle uphill
- homeylova223
- · Replies 5 ·
Question on a textbook statment on Rutherford Scattering
- User1265
- · Replies 2 ·
Standing waves on a string with a hanging mass
- chessmaster62
- · Replies 1 ·
Nuclear Power Plants - Electricity Production
- eminem4002
- · Replies 14 ·
Solving Spool Acceleration Problem Using Newton's Laws
- lua
- · Replies 12 ·
Calculate the density of the material for a vibrating string
- Bolter
- · Replies 1 ·
Second highest frequency in a sound pipe
- Bolter
- · Replies 5 ·
Induced EMF and current for a bar sliding on a circular rail
- FranzDiCoccio
- · Replies 22 ·
Calculating Work and Kinetic Energy on an Inclined Plane
- takelgith
- · Replies 2 ·
How Do Acceleration and Velocity Graphs Differ?
- IamVector
- · Replies 21 ·
How do you label vectors correctly in physics?
- ttpp1124
- · Replies 10 ·
Elastic ball collision problem
- IamVector
- · Replies 17 ·
Can I Combine X and Y Components in the Work Equation?
- Tinkylo
- · Replies 5 ·
Open pipe end correction distance for waves
- Bolter
- · Replies 8 ·
Solve Your Tennis Racket Problem with a Geometric Approach
- IamVector
- · Replies 5 ·
What is a probability mass function?
- flughafen
- · Replies 4 ·
Cars Collide on a Hill, Conservation of Momentum
- Bitmap
- · Replies 7 ·
Motion of rotating rig, find the angle variation with control rod length
- alexm
- · Replies 12 ·
Finding enthalpy for refrigerant-134a off the saturation curve
- yecko
- · Replies 3 ·
Specific heat capacity aluminium
- Cammers5
- · Replies 4 ·
Finding tension in a rope suspending a chandelier
- ttpp1124
- · Replies 10 ·
Why must normal force be zero at minimum speed in a loop?
- User1265
- · Replies 5 ·
Tension in rope: crane with box and anchor
- homeylova223
- · Replies 5 ·
Question on pulleys force and rope pulling
- homeylova223
- · Replies 8 ·
Formula for calculating wavelength of sound waves in interference?
- Myphysicsteachershit
- · Replies 1 ·
Vector Mechanics — Double Gear Rolling on a Rack
- Alexanddros81
- · Replies 8 ·
Calculating magnitude of the acceleration of two ocean liners
- naushaan
- · Replies 3 ·
(Relativity) A flash of light is emitted at x1 and absorbed at x1 + l
- PhDeezNutz
- · Replies 4 ·
Find the expression for Power in circuit
- VitaminK
- · Replies 1 ·
Calculating average acceleration during a time interval
- naushaan
- · Replies 5 ·
Calculatingthe resultant gravitational force on spherical objects
- naushaan
- · Replies 2 ·
How Do You Calculate the Tension in a Rope Holding a Chandelier?
- ttpp1124
- · Replies 8 ·
How to calculate the equivalent resistance in this Circuit?
- VitaminK
- · Replies 33 ·
Order of anharmonicity of a simple pendulum
- Saptarshi Sarkar
- · Replies 4 ·
Propagation of uncertainty with tangent function?
- Cheesycheese213
- · Replies 5 ·
What are the Paschen and Lyman series in the electromagnetic spectrum?
- Jeff97
- · Replies 3 ·
How can hydrogen gas can be made to emit photons of different energies
- Jeff97
- · Replies 4 ·
Unit conversions involving Pascals
- chriscarson
- · Replies 67 ·
Find the mass of this ion moving in a magnetic field
- Bolter
- · Replies 2 ·
What is the work function of a metal?
- Bolter
- · Replies 4 ·
Accelerations in Atwood machine with three masses and upper pulley
- Asterast
- · Replies 16 ·
Heat dissipated in a Resistor-Capacitor circuit
- Prabs3257
- · Replies 9 ·
Phase difference between 2 points on a wave
- Bolter
- · Replies 8 ·
Deflection distance for an electron beam in an electric field
- Bolter
- · Replies 3 ·
How can I calculate the equivalent resistance of this circuit?
- AmirWG
- · Replies 9 ·
Calculate the velocity when 2 progressive waves are added together
- Bolter
- · Replies 6 ·
Have You Calculated the Maximum Bending Moment Yet?
- Ashish181
- · Replies 1 ·
Magnetic field vector using F = qV * B
- happyparticle
- · Replies 9 ·
Block pushed onto a moving conveyor belt
- IamVector
- · Replies 60 ·
Determine the magnetic field inside and outside the cable using Ampere's law
- Karl Karlsson
- · Replies 11 ·
Frequency of TV signal from EM waves
- Bolter
- · Replies 2 ·
Polarization of light -- Determine the thickness of the crystal
- Karl Karlsson
- · Replies 5 ·
How do I calculate tension force using F=ma?
- jamiebean
- · Replies 21 ·
About the constraint equations of a pulley
- nish95
- · Replies 4 ·
Calculate the current in all parts of this electric circuit
- Karl Karlsson
- · Replies 21 ·
Uncertainty calculation for a quiz problem
- jim421616
- · Replies 1 ·
Understanding a step in a Biot-Savart law problem
- Anti Hydrogen
- · Replies 2 ·
What is the mass of the ruler moments? (Answer: 127.04g)
- calculator20
- · Replies 3 ·
Projectile motion plot in Mathematica showing wrong results
- Saptarshi Sarkar
- · Replies 1 ·
Moment of inertia of a rod bent into a square
- Eggue
- · Replies 12 ·
Solving Bohr Atom Problem (Qs a-e)
- StillAnotherDave
- · Replies 13 ·
Kinetic force/force/tilted plane question
- jamiebean
- · Replies 6 ·
What is the contact force for a 20kg object with an acceleration of 2.7?
- jamiebean
- · Replies 16 ·
Why Does Adiabatic Compression Yield a Negative Work Calculation?
- ewang
- · Replies 3 ·
Calculate the focal distance of the duplicate
- Karl Karlsson
- · Replies 3 ·