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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Resistivity and Ohm's Law question
- Vickyvicksss
- · Replies 4 ·
Conservation of Angular Momentum Experiment: Moment of Inertia
- chrismoon
- · Replies 2 ·
Finding velocity of 225g ball after collision with 125g ball
- Apollinaria
- · Replies 12 ·
Neutron velocity selector and rotational speed of shaft
- argonsonic
- · Replies 2 ·
What Is the Minimum Mechanical Energy Needed to Change a Satellite's Orbit?
- jamesbiomed
- · Replies 11 ·
Center of Mass constant with near-correct attempt
- jamesbiomed
- · Replies 11 ·
Special relativity of space traveler and reference frames
- 09jlk
- · Replies 12 ·
RC circuit with two capacitors and resistors: time constant and charge
- ChelsM
- · Replies 5 ·
Velocity and Acceleration within first 10 seconds
- Perdition
- · Replies 3 ·
Bridge design conceptual questions
- giacomh
- · Replies 5 ·
Horizontal forces on door hinges supporting uniform 2m door
- jamesbiomed
- · Replies 31 ·
How Is Impulse Calculated in Tennis Ball Physics?
- Northbysouth
- · Replies 3 ·
Solve Momentum Problem: Skater w/60kg Mass+3kg Skateboard
- assaftolko
- · Replies 3 ·
Finding acceleration and velocity with friction and braking force
- lauraosborn
- · Replies 5 ·
The de Broglie wavelength of molecules
- roam
- · Replies 8 ·
Resistance of an electric motor
- pc2-brazil
- · Replies 3 ·
Finding the electric field of a uniformly charged cylinder using Gauss' law
- Miscing
- · Replies 2 ·
Solving Adiabatic Process in Diesel Engine: Final Temp of Air-Fuel Mixture
- menco
- · Replies 1 ·
Conservation of Momentum; finding the angular speed of a Neutron star
- Northbysouth
- · Replies 4 ·
Ball rolling down a slope without slipping
- jaumzaum
- · Replies 8 ·
How to Create a T vs Q Diagram for Carbon Dioxide?
- theintarnets
- · Replies 1 ·
Can a Charged Cloth Neutralize a Metal Rod Upon Contact?
- sgstudent
- · Replies 4 ·
Centripetal Acceleration must equal Gravity in a Space Station
- jamesbiomed
- · Replies 4 ·
Finding the velocity and angle after an elastic collision
- Northbysouth
- · Replies 4 ·
Pion Decay and Relativity Question
- SecretSnow
- · Replies 1 ·
Vertical Latch Friction Problem
- Houdini176
- · Replies 1 ·
Formula to find height required to reach x speed in freefall
- 72612
- · Replies 9 ·
Photoelectric effect and stopping potential
- dawn_pingpong
- · Replies 2 ·
Torque- rigid objects in equalibrium/ center of gravity.
- utnip123
- · Replies 3 ·
Write the density and its associated uncertainty of a cylinder
- Minou
- · Replies 1 ·
Angular momentum of a particle at position (3i + 4k) m
- Northbysouth
- · Replies 1 ·
Angular velocity and angular momentum
- Northbysouth
- · Replies 3 ·
The mass of the pendulum bob was determined on an electronic scale and
- alicia113
- · Replies 34 ·
Particles moving in a straight line
- phospho
- · Replies 2 ·
What is the job of a radio transmitter
- ASidd
- · Replies 2 ·
Velocity and Time of Ball Leaving Spring on Tray
- Usern4me
- · Replies 2 ·
Problem with finding time from projectile motion problem
- coneheadceo
- · Replies 13 ·
Direction of electric current in a conductor
- alicia113
- · Replies 24 ·
How Do I Correctly Calculate the Electric Force Vector Direction and Magnitude?
- Manodesi524
- · Replies 3 ·
Interference/diffraction pattern formed by 2 slits
- uwbadger17
- · Replies 1 ·
Newton's Second Law Equation acceleration Question
- Slusho
- · Replies 3 ·
Momentum problem involving collision of two balls
- Joshpho
- · Replies 5 ·
Dimensional analysis - working out if this is dimensionally correct
- ulfy01
- · Replies 2 ·
Pendulums with Mechanical Energy (conical pendulum?)
- victoration1
- · Replies 2 ·
Finding initial velocity of punted football from range and flight time
- d3nat
- · Replies 1 ·
How Do Vector Angles Behave with Different Quadrant Coordinates?
- CathyCat
- · Replies 7 ·
Finding spring constant from mass equilibrium and displacement
- helpmestudent
- · Replies 1 ·
Acceleration of blocks connected by pulley on incline
- ksm2288
- · Replies 6 ·
Force on electron travelling parallel to charge carrying longstraightwire
- zhillyz
- · Replies 1 ·
Can Two Repelling Spheres Be Solved?
- duhduhduh
- · Replies 5 ·
Why is it important to not delete posts after receiving help?
- duhduhduh
- · Replies 5 ·
Do Capacitors Actually Store Energy?
- duhduhduh
- · Replies 4 ·
What is the Frictional Force Acting on a Toy Being Dragged by a Child?
- inzektor95
- · Replies 4 ·
Still learning dimensional analysis
- help1please
- · Replies 3 ·
Long problem sum using Newton second law
- lauraosborn
- · Replies 4 ·
Graphing Magnetic Field and Current
- MelissaESCape
- · Replies 1 ·
Two ideal springs oscillating, find amplitude and phase difference between them
- scrodger
- · Replies 3 ·
Problem about charge concentration
- Cetullah
- · Replies 5 ·
Simple Harmonic Motion using total mechanical energy
- StrawHat
- · Replies 12 ·
Distance travelled by the particle
- utkarshakash
- · Replies 1 ·
How High Will a Golf Ball Bounce After Falling Down a 3m Staircase?
- Parzival
- · Replies 1 ·
Which has higher Kinetic Energy?
- utkarshakash
- · Replies 3 ·
Does Fluid Pressure Change with the Size of the Opening?
- Shordaay
- · Replies 4 ·
Trace and its square of mixed state density operator using integral
- xyver
- · Replies 1 ·
Horsepower to kilowatt-hours?
- rolodexx
- · Replies 16 ·
A couple of gravitational problems (kelper's third law)
- Vickyvicksss
- · Replies 2 ·
Electric field needed to balance weight of charged sphere
- Lydia22
- · Replies 1 ·
Lense- focal point, diagram position of image
- alicia113
- · Replies 3 ·
When material not be magnetized by a magnetic?
- LACH
- · Replies 1 ·
Work, heat and internal energy in pV diagram.
- Gavroy
- · Replies 12 ·
Magnetostatic field calculations
- Roodles01
- · Replies 4 ·
Converting d-t graph to v-t graph
- martinlhc
- · Replies 4 ·
Two blocks, a string, and a spring.
- AbigailM
- · Replies 1 ·
Calculate flow rate through venturi with 2m to 1m diameter change
- declanka
- · Replies 3 ·
Friction and elastic collisions
- dorker
- · Replies 1 ·
Inclined Plane w/ Two Masses: F=ma+mb?
- ksm2288
- · Replies 3 ·
From what height will two objects hit the ground at the same speed?
- hockeybro12
- · Replies 9 ·
Solving Kirchoff's Rules for Triangular Array of Resistors
- danbone87
- · Replies 8 ·
What is the required coefficient of static friction
- hockeybro12
- · Replies 6 ·
Should I round answers to match the least number of significant figures?
- emberjelly
- · Replies 7 ·
Electric current - High voltage power lines buzzing
- alicia113
- · Replies 9 ·
Wrong interpretation of physics
- aloe
- · Replies 9 ·
Two marbles colliding elastically on massless strings
- phoebz
- · Replies 25 ·
Having Maximum Velocity Issues?
- John_b
- · Replies 2 ·
Check my electric motor diagram and explain the buzzing sound
- alicia113
- · Replies 12 ·
Work done by moving electrons through electric potential?
- nghpham
- · Replies 3 ·
With what speed does the ion enter the magnetic field in a mass spectrometer?
- pinkyaliya
- · Replies 10 ·
Double slits experiment, wavelength calculation
- alsaadawi
- · Replies 2 ·
Finding the Position and Velocity of a Mass on a Slope Using Work and Energy
- assaftolko
- · Replies 17 ·
Displacement of mass fired by a slingshot problem
- vodkasoup
- · Replies 4 ·
Finding resultant force from two forces at angles
- dimens
- · Replies 13 ·
What Happens to a Point Charge Inside a Uniformly Charged Sphere?
- danilorj
- · Replies 3 ·
Checking geometry summer assignment pages 10-16
- Ichiro
- · Replies 1 ·
Pressure difference across a horizontal pipe from a water barrel
- Insidium
- · Replies 2 ·
Interpreting Data to Satisfy Conservation of Mass
- swmmr1928
- · Replies 2 ·
Finding where an electron is relative to a charge?
- Cathmore
- · Replies 1 ·
How to Calculate Tension in a Uniform Rope with a Constant Force Applied?
- Knightycloud
- · Replies 11 ·
Determine the slit-with and slit-distance of a double slit laser diffraction
- Firben
- · Replies 1 ·
Gauss' Law with Superposition Principle
- Quantum1990
- · Replies 3 ·