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 Heat Energy Changes in a Water and Ice System
- Ravi Ramdoolar
- · Replies 6 ·
Why is the Integral of Force Over dx Equal to Kinetic Energy?
- BadSkittles
- · Replies 1 ·
Solving Momentum Questions: Find Speed of Toy Car After Pellet Impact
- Fresko
- · Replies 4 ·
Drift current Is of PN junction under open-circuit conditions
- anhnha
- · Replies 1 ·
How Do Two Masses and a Spring Behave on a Frictionless Surface?
- SqueeSpleen
- · Replies 11 ·
What does maximum mean in this physics problem?
- Fresko
- · Replies 2 ·
Trooper catching speeder starting 4 seconds behind
- Nirupt
- · Replies 17 ·
Conditions for pulleys and strings
- andyrk
- · Replies 37 ·
Calculating Time Difference in Pursuit Situations
- Saitama
- · Replies 34 ·
Kinetic energy and momentum in an inelastic collision
- Fresko
- · Replies 9 ·
Angle when a projectile is launched at a height from the ground
- cookiecrumbzz
- · Replies 4 ·
Looking for an algebraic definition of work.
- Diax
- · Replies 4 ·
Penetrating power of radiation questions
- tg22542
- · Replies 7 ·
Minimal angular velocity of a swinging homogenous stick ?
- CandiedPaper
- · Replies 2 ·
Is it possible electrons fallen into holes and go straight to collecto
- anhnha
- · Replies 23 ·
Show that the forces form a couple (algebraic)
- Kinhew93
- · Replies 1 ·
Newtons cradle Conservation of Momentum
- Acadeus
- · Replies 1 ·
Saving Electrical Energy with a Heat Pump: 75%
- M9501
- · Replies 1 ·
What is the speed of a cylinder rolling down a hill?
- zeralda21
- · Replies 4 ·
Effects on water level when a sphere is replaced by a new solid sphere
- marisalyn21
- · Replies 6 ·
Finding Gravitational Acceleration from a Slope
- rakeru
- · Replies 21 ·
Time for ball to hit wall with drag force F = kv²
- An1MuS
- · Replies 14 ·
Angular momentum operators on matrix form
- Denver Dang
- · Replies 1 ·
Electric Potential Problem Involving Uranium Atom
- Kumo
- · Replies 8 ·
Velocity of a fluid within a pipe
- tooperoo
- · Replies 5 ·
Finding flight time from stroboscopic images with 0.01s flash intervals
- shin777
- · Replies 16 ·
What is the x>0 mean here? standing wave equation find nodes?
- Outrageous
- · Replies 8 ·
Calculating gauge pressure in lungs to produce certain speeds
- tooperoo
- · Replies 2 ·
AC circuit with capacitor and resistor current mismatch
- k31453
- · Replies 3 ·
Compare Velocity of Center of Mass - Two Hollow Cylinders
- LovePhys
- · Replies 2 ·
Calculate displacement [Two Dimensional Kinematics]
- HanSomPa
- · Replies 1 ·
Electric charges and conservation of energy
- vex390
- · Replies 1 ·
Find Tension in String Connecting Two Charged Spheres
- vex390
- · Replies 4 ·
Linear and Volume expansion Problem
- jk27
- · Replies 2 ·
Gasoline spilling from aluminum cylinder when heated
- KTANNE
- · Replies 3 ·
Solving Johnny's Swing Height Puzzle: Can You Get 1.4 Meters?
- Speedking96
- · Replies 3 ·
Is My Newton's Law Homework Answer Correct?
- whoareyou
- · Replies 1 ·
How Do I Convert v^2/r Into v?
- AnonymousTeen
- · Replies 1 ·
Answer: Understanding Electron Volt Energy for X-Ray Machines
- tooperoo
- · Replies 2 ·
Fleming's left hand rule, circular motion, and electromagnetic induction
- influx
- · Replies 1 ·
D and E at boundary (dielectrics)
- mishima
- · Replies 1 ·
What gives rise to eigenfrequencies?
- saumya yadav
- · Replies 1 ·
How to adjust cars diagonal weight without scales?
- chkhikvishvil
- · Replies 5 ·
Classical mechanics, mass on a spring
- Cogswell
- · Replies 12 ·
Finding tension in a suspended cable with two weights
- datphysics
- · Replies 5 ·
Electrostatics, parallel plates
- physics604
- · Replies 3 ·
Period of particle oscillating in symmetric potential U(x)=U(-x)
- robertjordan
- · Replies 15 ·
Voltage transfer functuon of network
- jmher0403
- · Replies 3 ·
Electrostatics, finding velocity of electron
- physics604
- · Replies 3 ·
Electrostatics, finding velocity of proton
- physics604
- · Replies 3 ·
Cone rolling on a conical surface
- Saitama
- · Replies 8 ·
When is the first equation used to calculate pressure change in a system?
- FollowTheFez
- · Replies 1 ·
Finding Torque within the Human Arm
- KakashiT
- · Replies 2 ·
Particle collides totally inelastically with a vertical free rod
- rbwang1225
- · Replies 2 ·
Boolean Algebra (negation quickie)
- sunrah
- · Replies 4 ·
Car turning on a curved road and friction
- andyrk
- · Replies 5 ·
Distance between 2 atoms in a crystal
- Nemo's
- · Replies 9 ·
Linear Drag Force Homework: Acceleration & Constant Speed Calculations
- antoman
- · Replies 3 ·
Using torque to find mass of meter stick
- gake
- · Replies 11 ·
Varying Potential Energy and Amplitude in Unusual Harmonic Motion
- Arkavo
- · Replies 91 ·
Best solution? for work done on a spring.
- Tyrannosaurus_
- · Replies 4 ·
Vector diagrams and Calculating Angles
- FollowTheFez
- · Replies 10 ·
Angle between hour and second hand at 10:20:30
- ador250
- · Replies 5 ·
Question- Newton's Law of Cooling
- sankalpmittal
- · Replies 4 ·
Statics- Resultant couple moment
- rico22
- · Replies 4 ·
What is the Velocity of Water Exiting a Hole in a Bucket?
- HelpMePleez
- · Replies 7 ·
Photon flux from a light source
- spaghetti3451
- · Replies 2 ·
Heat energy change when gas compressed
- blueberryfive
- · Replies 4 ·
Euler Angles/ Rigid Body application
- redlegtwoone
- · Replies 3 ·
DIffering Weight at equator and poles
- gake
- · Replies 5 ·
Find the time constant of a damped system
- hamsterB
- · Replies 1 ·
Oblique Impact of a smooth sphere against a fixed plane
- andyrk
- · Replies 10 ·
How Do Injected Holes Flow in an NPN Transistor?
- anhnha
- · Replies 3 ·
How Fast Can a Merry-Go-Round Spin Before a Child Slides Off?
- cheddahchad
- · Replies 1 ·
Elastic collision. to find values
- shin777
- · Replies 7 ·
What is the motion of the block when released from a compressed spring?
- allyfranken
- · Replies 1 ·
Explain to me why the net force is found this way?
- agentlee
- · Replies 8 ·
Ice skater spinning: kinetic energy and angular momentum
- urbano
- · Replies 4 ·
Cartesian Distance from Origin in the XY Plane
- Robertoalva
- · Replies 8 ·
Displacement of box on inclined plane due to spring
- hkor
- · Replies 10 ·
Change in momentum after hitting a wall
- gake
- · Replies 2 ·
Minimum acceleration needed for box to not fall from accelerating cart
- hkor
- · Replies 8 ·
Why we cannot measure built in voltage in PN juction?
- anhnha
- · Replies 10 ·
Raindrops per tile from density
- Robertoalva
- · Replies 3 ·
What are the equations for projectile motion on an inclined plane?
- Big-Daddy
- · Replies 1 ·
Constant Acceleration; Dynamics
- allyfranken
- · Replies 1 ·
Orbit about star, emission spectrum of light
- unscientific
- · Replies 3 ·
What is the Relationship Between Net Flux and Total Charge for a Cube?
- baird.lindsay
- · Replies 6 ·
Calculus-based relationships in electrostatics
- blueberryfive
- · Replies 1 ·
Projectile explosion velocity and direction of fragments
- j_namtirach
- · Replies 2 ·
Estimate minimum proton lifetime from internal radiation rate
- sunrah
- · Replies 1 ·
What ion is this? even emission lines matches lyman series of hydrogen
- unscientific
- · Replies 1 ·
How Is the Rydberg Constant Calculated from Photon Absorption Wavelengths?
- unscientific
- · Replies 7 ·
What is the radius of the equipotential surfaces for a charged cylinder?
- carnot cycle
- · Replies 7 ·
Why does a spot on the outer rim travel faster than one on the inner rim?
- lala_and_peril
- · Replies 13 ·
Direction of normal reactions on a beam
- arestes
- · Replies 1 ·
Crumple zone in cars and ways to measure its effectiveness
- komender
- · Replies 8 ·
Speed of rocks when they hit the ground
- limonade
- · Replies 2 ·
Statics Problem, Moment About an Axis
- yaro99
- · Replies 3 ·