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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Calculating Pressure at the Bottom of a Tank Using Density and Volume
- talaroue
- · Replies 36 ·
Which Jet Ski Crosses the River Faster?
- wadini
- · Replies 16 ·
Finding liquid density from neutral buoyancy of a sphere
- talaroue
- · Replies 3 ·
Two conducting balls with attraction then repulsion
- thebe39
- · Replies 8 ·
How Do You Calculate Energy and Speed of a Roller Coaster at Different Points?
- Amjad1112
- · Replies 1 ·
Moon's orbital period around Earth-Moon center of mass
- Karol
- · Replies 8 ·
Calculate Pressure Gauge Reading in Wide Section of Pipe
- brunettegurl
- · Replies 2 ·
Equilibrium of a compound object
- nokia8650
- · Replies 3 ·
How Does Moving a Metal Rod in a Magnetic Field Induce Current?
- science.girl
- · Replies 13 ·
Long Jump problem with only distance and height given
- Paulo Serrano
- · Replies 7 ·
Solving the Speed of a Projectile Passes an Observation Satellite
- talaroue
- · Replies 22 ·
How Does Photon Wavelength Affect Electron Ejection and Metal Work Function?
- science.girl
- · Replies 8 ·
D) T1 - T2 = m1g + qE1 = m2g - qE2 Solving Magnetism Question Homework
- science.girl
- · Replies 8 ·
Distance between dark fringes in double slit demo with fluid
- science.girl
- · Replies 7 ·
Two particles collide and form a new particle
- Miri
- · Replies 22 ·
Calculating direction of travel on a clock face
- medelec35
- · Replies 6 ·
How to Determine the Depth of an Ice Cube Floating in Water?
- brunettegurl
- · Replies 5 ·
Motion in 2D Question: Solving for Time and Impact of a Thrown Stone
- rjelalam
- · Replies 2 ·
Complex Pulley System (five different pulleys)
- mxyplizk
- · Replies 3 ·
Potential vs Kinetic Energy: Proton-Hydrogen Deflection
- thomas49th
- · Replies 2 ·
Find position after t for simple harmonic motion
- smillphysics
- · Replies 4 ·
How Many Water Molecules in a Glass?
- chawkdee
- · Replies 1 ·
How Much Does the Rope Stretch When a Circus Performer Hangs at Rest?
- smillphysics
- · Replies 2 ·
Magnetic Interactions vector diagram
- robera1
- · Replies 26 ·
Photoelectric Effect: Which Answer is Correct?
- science.girl
- · Replies 2 ·
Finding unknown lamp intensity when illuminances are equal
- J89
- · Replies 1 ·
Simple Vector Problem - Finding the x-component
- Nulligan
- · Replies 4 ·
Exact Energy usage in an AC-R circuit
- azi100
- · Replies 3 ·
How many U-235 atoms undergo fission per second in a 30000 kW reactor?
- roshan2004
- · Replies 3 ·
Find max energy stored in oscillating system
- smillphysics
- · Replies 1 ·
How Does Newton's Third Law Apply Here?
- iamtrojan3
- · Replies 2 ·
Rocket trajectory in vertical launch then free fall
- jontyjashan
- · Replies 1 ·
Elastisity: Hooke's Law Finding Spring Compression
- Prophet029
- · Replies 4 ·
What Went Wrong? Calculating the Max Height of a Projectile at a 30 Degree Angle
- Bobbert
- · Replies 3 ·
De Broglie wavelength (relativistic e-)
- Jules18
- · Replies 3 ·
How is theta obtained when using torque = F*r*sin(theta)?
- kathyt.25
- · Replies 2 ·
A balloon and a springfind extension
- brunettegurl
- · Replies 2 ·
Time taken to reach the water's surface
- brunettegurl
- · Replies 2 ·
How Do You Calculate Rocket Initial Velocity Using Acceleration and Time?
- python1
- · Replies 6 ·
Newton's 3rd Law and Acceleration
- wadini
- · Replies 8 ·
How does temperature affect the volume of air?
- bigboss
- · Replies 7 ·
What value of the velocity should I insert in the equation?
- antigona
- · Replies 3 ·
How Much Heat is Needed to Melt 24.0 kg of Ice?
- bigboss
- · Replies 4 ·
How Far Should a 5.6 kg Box Be Placed for Balance?
- skandol
- · Replies 1 ·
Radiation, Magnetic fields and Linear Acceleration?
- NeroBlade
- · Replies 5 ·
Coefficient of resistution problem
- nokia8650
- · Replies 3 ·
Rocket with constant velocity then free fall motion
- jontyjashan
- · Replies 2 ·
Rolling Cylinders: Find Final Velocity & Height
- PrideofPhilly
- · Replies 8 ·
Finding a vertical distance of niagara falls?
- ob123
- · Replies 3 ·
Uncertainty in sphere density from radius and mass measurements
- xX1SHOt
- · Replies 7 ·
Total internal reflection with n1sin(44°)=n2sin(48°)
- Awsom Guy
- · Replies 5 ·
A Spinning Top and Rotation Dynamics
- PrideofPhilly
- · Replies 8 ·
What is the Launch Speed of Debris Ejected from Io's Volcanoes?
- dREAPER
- · Replies 8 ·
How Long to Accelerate a Projectile to Orbital Speed?
- kiwisj
- · Replies 2 ·
Net torque of a person's shoulder, holding a weight
- kathyt.25
- · Replies 2 ·
Magnetic field of an infinite layer
- Dell
- · Replies 1 ·
Where Does a Stuffed Animal Land When Dropped from a Ferris Wheel?
- wadini
- · Replies 1 ·
Calculating Height of Racket Ball Leaving Racket
- wadini
- · Replies 1 ·
Block pulled at an angle with friction
- sentinel7e
- · Replies 4 ·
Solving a Soccer Player's Physics Problem: Horizontal Kick Speed
- blackboy
- · Replies 2 ·
Finding Velocity of a Dropped Shellfish
- Aljazera
- · Replies 1 ·
Given initial angular velocity of wheel, find revolutions to rest
- pengwum
- · Replies 1 ·
Electric potential vs gravitational potential and nuclear collision limits
- thomas49th
- · Replies 3 ·
Finding the single displacement for an expert golfer to make the hole
- balling12
- · Replies 1 ·
What Determines the Order of Arrival of Cylindrical Masses on an Incline?
- fruitl00p
- · Replies 5 ·
How Do You Derive the Final Equation for Displacement and Time?
- Anita08
- · Replies 7 ·
Non Inverting and Inverting Amplifiers
- robostar
- · Replies 1 ·
Torque about the axle of a rotating disk
- kathyt.25
- · Replies 3 ·
How to Calculate Work Done in Extending a Material to Breaking Point?
- EskShift
- · Replies 12 ·
Speed, distance and spring on a track
- brunettegurl
- · Replies 8 ·
Distance travelled by the case down a ramp w/a spring at the bottom
- brunettegurl
- · Replies 5 ·
How high was the girl when she let go of the rope?
- wadini
- · Replies 9 ·
How Do You Calculate Final Velocity and Time for an Object on a Sloped Surface?
- murphy1935
- · Replies 1 ·
Minimum Acceleration for Ball to Reach Top of Vertical Ring
- PipelineDream
- · Replies 4 ·
Magnetoelectric induction, I think
- Dante68
- · Replies 1 ·
When to use conservation of momentum vs energy in collisions?
- quirck
- · Replies 3 ·
Bungee Jumper Physics Lab Question
- flouran
- · Replies 1 ·
How Many Meters Does a Car Travel to Reach 125 km/h from a Standstill?
- hongwong
- · Replies 7 ·
How Do You Calculate Force Components and Moments in Vector Problems?
- greg997
- · Replies 1 ·
Rolling Motion of a motorcycle
- grandprix
- · Replies 2 ·
Vector sum of magnetic and electronic forces
- grandioso50
- · Replies 2 ·
Review Physics Concepts for Final - Light Refraction, Mirrors, Lens, Circuits
- whitehorsey
- · Replies 1 ·
What are the equations for tension and acceleration in a pulley system?
- irishrock724
- · Replies 3 ·
Simple velocity/motion question
- stuarthin
- · Replies 1 ·
How Can You Simplify Calculations for Artillery Projectile Motion?
- Philosophaie
- · Replies 1 ·
Solving for Angle in Projectile Motion
- blackboy
- · Replies 11 ·
How to Calculate the Orbital Period of a Satellite Around Planet Zeta?
- EskShift
- · Replies 5 ·
How Does Gravity on Planet Zircon Compare to Earth?
- wadini
- · Replies 4 ·
Arrow shot horizontally at target 17 m away hits 0.51 m lower
- wadini
- · Replies 6 ·
Why Does a 1 kg Ball of Iron Feel Heavier Than a 1 kg Ball of Cotton?
- lotusbio
- · Replies 5 ·
Faraday's Law and a metal loop
- robera1
- · Replies 1 ·
Entropy of a mole of an ideal gas
- fluidistic
- · Replies 4 ·
Problem Solving: Is My Solution Right?
- monty37
- · Replies 2 ·
How Much Mass Converts to Energy to Accelerate the Enterprise to 0.1c?
- pinkerpikachu
- · Replies 1 ·
What is the angular velocity of the two disks combined?
- mastamind518
- · Replies 3 ·
Explaination - Cent. Acceleration and Tangential Acceleration,
- grandprix
- · Replies 3 ·
How do I work out wave phases?
- K41
- · Replies 1 ·
What Should the Mass of W Be to Support a 77 kg Person's Head?
- dREAPER
- · Replies 5 ·
Rotational Kinematics Problem - find the angular displacement
- grandprix
- · Replies 2 ·
Adjusted vehicle acceleration up an incline
- raverix
- · Replies 3 ·