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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Understanding Light Dimmers: Changing Current & Voltage
- Jules18
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What is the relationship between h and R in this circular motion problem?
- Almond
- · Replies 10 ·
Is 2.6x10^9C a Plausible Answer for a Pith Ball Electrostatics Problem?
- Procrastinate
- · Replies 2 ·
Ultrasound transmitter component- longitudinal or transverse waves?
- coffee&tv
- · Replies 10 ·
Finding the Longest Wavelength of Standing Waves on a 254.0 cm String
- kathyt.25
- · Replies 2 ·
How Do You Calculate the Forces Needed to Move and Accelerate a Trunk?
- caesar88
- · Replies 1 ·
What is the Force Exerted by the Sun on Earth?
- tag16
- · Replies 1 ·
Does Body A Exert a Negative Impulse on Body B in a Closed System?
- nokia8650
- · Replies 1 ·
Equipotential Surfaces: Calculating Work Required to Move a Charge
- daimoku
- · Replies 3 ·
Field at a distance 'z' from a solenoid
- Dell
- · Replies 1 ·
Car collision, force exertion and impulse.
- TheAkuma
- · Replies 4 ·
UV vs IR Light Bulb Power Comparison
- georgeh
- · Replies 7 ·
Projectile Motion w/ unknown initial velocity & uneven launch/landing points
- txaggiejs18
- · Replies 4 ·
Finding speed of sound in an object
- kathyt.25
- · Replies 2 ·
Microscope Theory - Alternatives to the use of light?
- mohammed_a
- · Replies 5 ·
Calculating Velocity of a Pendulum Using Equations
- Dazz4C
- · Replies 8 ·
Uniform rod can pivot about a horizontal, fr
- synchronous
- · Replies 2 ·
Proving Stacking Dominoes' Maximum Overhang w/ Centre of Gravity
- Chewy0087
- · Replies 13 ·
10 kg block on 40 kg slab pulled with 100 N force
- bodensee9
- · Replies 8 ·
To avoid a collision what is your reaction time?
- KaseyK
- · Replies 3 ·
Maximum photocurrent ejected by electrons in photoelectric effect
- Mola
- · Replies 1 ·
Calculating Tension and Mass in a Hanging Spotlight System
- Lancelot59
- · Replies 9 ·
Sound waves(phase difference) PLS. HELP
- brunettegurl
- · Replies 6 ·
Kinetic and Potential Energy rollercoaster
- Gregg
- · Replies 4 ·
Calculating the wavelength of soundwaves
- leena19
- · Replies 10 ·
Pendulum conservation of energy question
- neoaddict
- · Replies 5 ·
What is the equivalent resistance and current in this parallel circuit?
- jackxxny
- · Replies 8 ·
The Fundamental Frequencies of Open Pipes
- leena19
- · Replies 3 ·
Calculate acceleration of object with applied force and friction
- username12345
- · Replies 2 ·
Should It Be In Series or Parallel?
- Procrastinate
- · Replies 6 ·
Tension in a Uniform Cable: Where Does the Force Balance?
- Amar.alchemy
- · Replies 3 ·
Tangential Acceleration of pendulum
- blackboy
- · Replies 16 ·
What is the Average Force on Each Foot During a Jump?
- prophecygirl
- · Replies 2 ·
Calculating Water Speed in a Pipe: Solving a Fluid Dynamics Problem
- Liketothink
- · Replies 16 ·
Steel floating in mercury problem
- Liketothink
- · Replies 11 ·
What is the Time to Drain a Tank with a Small Hole at the Base?
- powerbuddy
- · Replies 2 ·
Vertical Jump Analysis: Calculating Time and Take-Off Speed
- KaseyK
- · Replies 8 ·
A Simple Acceleration Problem - two different answers
- PeterPumpkin
- · Replies 4 ·
Radioactive Decay: 56Co to 56Fe - Which Type of Beta Decay?
- Jules18
- · Replies 4 ·
Solving Circular Motion: Train Slows from 90 to 50 km/h
- blackboy
- · Replies 3 ·
Free energy from Thorium to Radon
- Xeno24
- · Replies 1 ·
Average Speed - isn't this average velocity?
- KaseyK
- · Replies 3 ·
Calculate Length of Steel Above Surface in Steel Cylinder Floating in Mercury
- talaroue
- · Replies 16 ·
Coal Car and horizontal impulse
- turandorf
- · Replies 5 ·
Center of Mass: Plate with hole
- turandorf
- · Replies 1 ·
Pile driver - Conservation of enegy
- darkminos
- · Replies 14 ·
What Beat Frequency Results from Unequal Tensions in Piano Strings?
- physics10189
- · Replies 6 ·
Hole in a container and its distance from the bottom
- brunettegurl
- · Replies 6 ·
What is the velocity of gasoline in a siphon tube after opening?
- smillphysics
- · Replies 5 ·
Young's modulus of copper by projecting a laser
- negat1ve
- · Replies 2 ·
How can trigonometry be used to calculate distance in physics problems?
- fireykitty
- · Replies 4 ·
Measuring gravitational acceleration in a vacuum
- Skorbee
- · Replies 3 ·
Solving Pressure of Syringe Homework Statement
- mercury126
- · Replies 2 ·
Force and flow speed of a syringe
- aligass2004
- · Replies 6 ·
Cart, Incline, Pulley, and a messed up Acceleration.
- Some_Thing
- · Replies 5 ·
Use of potentiometer or rheostat to determine resistance – need clarification
- elvinc
- · Replies 1 ·
What Are the Key Physics Concepts Behind How Cameras Work?
- danielprive6
- · Replies 1 ·
Solve Friction on an Angle with 7.0kg Mass: u=0.2
- thelastdeath
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How Much Work Does a Plane's Engine Perform to Reach 3200m at 65m/s?
- Some_Thing
- · Replies 3 ·
Rotational Kinetic Energy - Clarification on what I need to solve for
- grandprix
- · Replies 2 ·
What is the mass density of a submerged cylinder?
- cyclemun
- · Replies 7 ·
How Long Does It Take for a Car to Catch Up to a Truck?
- muktl
- · Replies 1 ·
Derive a general formula for finding range with a spring launcher
- Bobbert
- · Replies 13 ·
Thermal Radiation Homework: Ranking Objects of Same Material
- tjr39
- · Replies 1 ·
Inclined plane and inclined force-acceleration
- dejna007
- · Replies 3 ·
Stress and Strain, simple question Just need a clarification
- grandprix
- · Replies 3 ·
How Do You Calculate the Tension in a String Lifting an Accelerating Mass?
- iamtrojan3
- · Replies 2 ·
What is the submarine’s maximum safe depth?
- GreyGus
- · Replies 3 ·
Why Does an Athlete Seem to Hang in the Air During a Vertical Jump?
- Amar.alchemy
- · Replies 4 ·
Inelastic collision of snadwiches
- weskerq8
- · Replies 5 ·
One-dimensional motion with w/ aceleration dependant on speed.
- Brasi333
- · Replies 3 ·
Tank and a hole in it whats the speed?
- brunettegurl
- · Replies 7 ·
Finding Revolutions per Second of Electron & Proton in Magnetic Field
- FelixISF
- · Replies 5 ·
What is the induced current in a moving frame near a changing current wire?
- Dell
- · Replies 14 ·
Block and bullet collision problem
- reb659
- · Replies 7 ·
Speed of car down hill with same power as up.
- alexander_i
- · Replies 6 ·
Positively charged side with induced emf
- VenaCava
- · Replies 4 ·
Circular Motion Homework: Radial & Tangential Accel, Total Accel
- blackboy
- · Replies 8 ·
Find Acceleration with only Initial Velocity and Final position?
- fireykitty
- · Replies 6 ·
What is the Minimum Force Required to Inject into a Vein Using a Syringe?
- smillphysics
- · Replies 2 ·
Aim of Refraction Practical Using Snell's Law
- Awsom Guy
- · Replies 7 ·
How to Determine the Upward Acceleration of a Mass in a Pulley System?
- delecticious
- · Replies 3 ·
Calculating the speed of sound in air
- leena19
- · Replies 2 ·
find the magnitude and direction of the final velocity
- bigboss
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A complex question which has mass, time and acceleration involved
- TheAkuma
- · Replies 4 ·
What is the Average Velocity Vector of a Clock's Minute Hand?
- arperidot
- · Replies 2 ·
Two basic physics 11 wave questions
- Kingsley
- · Replies 2 ·
Determine the dielectric constant
- jamba88
- · Replies 1 ·
Applying Newton's Laws: Crate on an Inclined Ramp
- coco87
- · Replies 6 ·
Range of mass so the body won't move
- Mad_Eye
- · Replies 1 ·
Determining Acceleration of Pulley System w/ Friction
- lexi011
- · Replies 1 ·
Calculate angles from axis with a 3d vector
- xX1SHOt
- · Replies 5 ·
Help Needed: Urgent Calculus Project - When the World Will End
- Radja24
- · Replies 4 ·
What rate does water flow through the pipes?
- brunettegurl
- · Replies 5 ·
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 ·
What am I doing wrong?: Buoyancy of an Object Homework Question
- talaroue
- · Replies 3 ·
Electrostatics: Two charged balls with attraction
- thebe39
- · Replies 8 ·
How Do You Calculate Energy and Speed of a Roller Coaster at Different Points?
- Amjad1112
- · Replies 1 ·
Earth & moon rotate round center of mass
- Karol
- · Replies 8 ·