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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Interesting science developments
- Soilwork
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Why is refraction absent on curved surfaces?
- lalota
- · Replies 6 ·
How Do You Calculate the Mass of a Block of Ice Using Thermal Dynamics?
- derfrok
- · Replies 2 ·
Solve this Math Problem: Find Last 2/3 Digits of 3^3^3^3
- ilml
- · Replies 2 ·
Finding the angle between 2 vectors
- PinkFlamingo
- · Replies 5 ·
Coulomb's law and different charges
- PinkFlamingo
- · Replies 2 ·
Is the Density of Gas Always 1.29 kg/m³ in Harmonic Sound Wave Calculations?
- cseet
- · Replies 1 ·
How to Solve a Particle Motion Problem with Increasing Resistance?
- mcintyre_ie
- · Replies 14 ·
How Many Water Changes to Achieve Required Ammonium Sulfate Concentration?
- Jikx
- · Replies 1 ·
Energy of photon emitted in hydrogen transition from n=4 to n=3
- UrbanXrisis
- · Replies 9 ·
Work to accelerate electron and stop moving car
- krypt0nite
- · Replies 5 ·
Kinematics: Solving Problems with Displacement, Velocity, and Acceleration
- PhysicsBeginner
- · Replies 4 ·
What is the Acceleration of an Electron in a Constant Electric Field?
- 3.14159265358979
- · Replies 4 ·
How Do Impulse and Momentum Affect the Motion of Colliding Ice Skaters?
- loatisaf
- · Replies 3 ·
How to calculate uncertainty in measurements
- repugno
- · Replies 3 ·
What percentage of carbon-14 decays in 22922 years?
- mustang
- · Replies 3 ·
How Much Weight Can a Hot Air Balloon Lift Given Specific Conditions?
- dubsinpubs
- · Replies 2 ·
How Do You Calculate Kinetic Friction Force in a Sliding Object Problem?
- redshift
- · Replies 6 ·
How does temperature affect the speed of gas molecules?
- exequor
- · Replies 4 ·
How Is Acceleration Determined When a Weight Is Suspended on a String?
- redshift
- · Replies 8 ·
Finding where y = 0.027x² + 8.3x - 7.5 has a 35° slope
- Arienne
- · Replies 2 ·
Tension in String One of 5 kg Mass at 45 Degree Angle
- UrbanXrisis
- · Replies 6 ·
Triangular loop in magnetic field
- Juntao
- · Replies 5 ·
Probability of goalkeeper saving penalties
- RBS_5
- · Replies 3 ·
LOADS of Final Review Questions
- physicszman
- · Replies 4 ·
Rectangular plot fenced on three sides with 100m of fencing and 500m² area
- travishillier
- · Replies 3 ·
Finding rectangular plot dimensions with 100m fencing and 500m² area
- travishillier
- · Replies 3 ·
Finding currents through resistors with two EMFs in parallel
- Drakon25th
- · Replies 6 ·
Bode Diagrams for Transfer Function: (s+2)/(s*(s+10)*(s^2+2s+2))
- UnteljentEnginyr
- · Replies 2 ·
Calculating Center of Mass of a Hollow Nose Cone
- mase5151
- · Replies 4 ·
Momentum Transfer in 1.00kg Steel Ball Collision
- LD_90
- · Replies 2 ·
What are the physics and circuitry behind smart bombs?
- Rudy_51
- · Replies 2 ·
Limit of (x+2)/(x³+8) as x approaches -2 and gradient of 4^x
- Sombra
- · Replies 3 ·
How Can I Understand Logarithms and Their Graphs Better?
- baltimores_finest
- · Replies 3 ·
How Can You Transform Ring into Bell by Changing One Letter at a Time?
- travishillier
- · Replies 2 ·
Help finding physics resources or textbooks
- cronxeh
- · Replies 2 ·
Skydiver ripcord timing for gentle landing with parachute drag
- Nightspeed
- · Replies 6 ·
Probability question: random variables
- jezse
- · Replies 2 ·
How much TNT can be made from 46 kegs of toluene?
- ignorant1
- · Replies 2 ·
How Can Impulse Be Converted to Energy in Rocket Flight Calculations?
- SamB
- · Replies 2 ·
Solving a Half-Life Physics Problem: Estimating Radon-222 Atom Decay in 12 Days
- mustang
- · Replies 2 ·
Relative velocity between two cyclists
- Azeri
- · Replies 9 ·
How Do You Sketch and Analyze the Graph of k(x) = x^4 - 64x^2?
- mustang
- · Replies 5 ·
Solving quadratic equations and evaluating a polynomial
- Sope0nARope
- · Replies 3 ·
Solving Elliptical Orbit Problems for Space Dynamics Exam
- retupmoc
- · Replies 4 ·
Will a ball rolling from hill A reach the top of taller hill B?
- indebluez
- · Replies 3 ·
How Is Arc Length in Polar Coordinates Used in Real Life?
- o0123456543210o
- · Replies 2 ·
Why does the acceleration graph look like a /\\ when a ball is dropped?
- indebluez
- · Replies 14 ·
Measuring specific latent heat of ice without a calorimeter
- xxpsychoxx
- · Replies 3 ·
Is Pair Production and Annihilation the Same Process?
- EIRE2003
- · Replies 2 ·
Power and torque for lifting a bucket with a winch
- Cyannaca
- · Replies 5 ·
Calculating the Inductance of a Toroidal Solenoid
- Cockroach
- · Replies 4 ·
Thin lens equation problems with image distance and magnification
- moonlit
- · Replies 4 ·
Velocities of balls after 2D collision
- UrbanXrisis
- · Replies 5 ·
Is The Elegant Universe a Bridge Between Quantum Physics and Relativity?
- Imparcticle
- · Replies 5 ·
Finding direction and mass of third fragment after rock explosion
- wikidrox
- · Replies 2 ·
Before I attempt this next problem on sliding blocks
- redshift
- · Replies 3 ·
How can I calculate the work done by weight on a crate sliding down an incline?
- kdinser
- · Replies 5 ·
Infinitely annoying square well
- gnome
- · Replies 2 ·
How is Electric Potential Determined from Infinity?
- Antepolleo
- · Replies 6 ·
What is the Electrical Potential Between Two Point Charges?
- becca
- · Replies 4 ·
Find change in resistance for mercury-tube breathing monitor
- JJaX
- · Replies 1 ·
Two weights connected by string pulled upward at 30N
- redshift
- · Replies 16 ·
Question how to solve car problem
- jaye21
- · Replies 2 ·
Solve Time Rate of Change of Mechanical Energy for Damped, Undriven Oscillator
- Soilwork
- · Replies 2 ·
Fortran program reading wrong values from binary file
- falcon0311
- · Replies 4 ·
Solving String Wave Frequency: 6m in 0.5s
- cseet
- · Replies 2 ·
What does reducing wave speed by a factor of 2 mean?
- cseet
- · Replies 3 ·
Is the Antiderivative of 1/x Actually ln(x)?
- chemical
- · Replies 4 ·
Help reviewing refraction and lens problems for physics final
- moonlit
- · Replies 8 ·
How Do You Sketch a Traveling Wave at Different Time Intervals?
- stawbeegirl
- · Replies 3 ·
How to Determine the Force on a Wire Frame in a Magnetic Field?
- edge
- · Replies 2 ·
Shortest mirror height to see full image when eyes are 1.8 m high
- moonlit
- · Replies 2 ·
Converging lens with 7 cm and 12 cm focal lengths
- eku_girl83
- · Replies 2 ·
What Is the Closest Object That Can Be Seen Clearly with Swapped Glasses?
- RicXeoR
- · Replies 2 ·
Is 'gustar' really different from 'to like' and 'to please'?
- Imparcticle
- · Replies 5 ·
Pressure on a submarine window problem
- jamdr
- · Replies 4 ·
Why is a magnet broken in half still as magnetic as the original?
- holly
- · Replies 7 ·
Thermodynamics/Gas Law questions
- Carbonoid
- · Replies 2 ·
Final kinetic energy with two different forces applied sequentially
- wikidrox
- · Replies 5 ·
I really - angular speed and speed at equilibrium position
- BananaRed
- · Replies 7 ·
What physics principles are involved in the operation of a turbocharger?
- Darken
- · Replies 3 ·
Work Function of Silver: Solve Problem 18 for eV
- mustang
- · Replies 2 ·
Weight on spring with 6 cm/s downward velocity from equilibrium
- jen043081
- · Replies 2 ·
Finding Real Zeros of Polynomial Functions Using Derivatives
- mustang
- · Replies 7 ·
What is the annual rate of increase for a gallon of milk?
- mustang
- · Replies 3 ·
What is the speed of light in a universe with altered physical constants?
- athenaroa
- · Replies 2 ·
Can I Prove Perpendicular Acceleration Using d(v^2)/dt = 0?
- LD_90
- · Replies 3 ·
A Mover Pushes a Piano Up a Ramp: Work Done?
- bbg5000
- · Replies 3 ·
Gravitational force between two people and Earth spin rate
- wikidrox
- · Replies 2 ·
What is fluorescence and how does it arise?
- retupmoc
- · Replies 2 ·
Constructive interference from coherent sources 1.72 μm apart
- eku_girl83
- · Replies 2 ·
How Do You Calculate Net Force and Impulse in Physics Problems?
- wikidrox
- · Replies 11 ·
Calculate Index of Refraction: Air to Glass
- cowgiljl
- · Replies 2 ·
Can someone check my Physics working?
- cseet
- · Replies 2 ·
What Formulas Determine the Sliding and Toppling Forces on a Cube?
- jimmy p
- · Replies 2 ·
How Is the Electric Field Calculated Outside a Cylindrical Conductor?
- jreinier
- · Replies 2 ·
Box volume problem: square cut from corners, and polynomial equation
- mustang
- · Replies 3 ·
The inverse of a set of points?
- thinice
- · Replies 4 ·
Why Convex Mirrors are Used in Late Model Cars
- cowgiljl
- · Replies 2 ·