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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Radiation physics and special relativity
- RadPhysNoob
- · Replies 1 ·
Reevaluating the Bohr Model of the Atom and Its Radiation Emission
- AStaunton
- · Replies 1 ·
What is the Charge on a Bead Accelerating in a Uniform Electric Field?
- Sarah88
- · Replies 2 ·
Solving Diode Circuits: I & V for Ideal & CVD Models
- Bassalisk
- · Replies 10 ·
Finding Force pulling an Object Up an incline
- Daishi
- · Replies 4 ·
Energy conservation equation problem
- panzer1234
- · Replies 6 ·
Electron moving in magnetic field. (Physics 2, non calc)
- pdeco1
- · Replies 5 ·
Understanding Momentum in Continuous Mass Flow Problems
- unscientific
- · Replies 1 ·
Finding location of turning points. Potential Energy?
- Patdon10
- · Replies 2 ·
Stored Magnetic Energy - Inductor Circuit
- Bryon
- · Replies 8 ·
How High Is a Geostationary Satellite Above Earth?
- crosbykins
- · Replies 8 ·
Thermodynamics: proof about free expansion
- A_B
- · Replies 4 ·
Ladder resting against wall(equilibrium)
- dvvv
- · Replies 11 ·
Inelastic collision in rotational motion
- zorro
- · Replies 13 ·
Difference between F=GMm/r^2 and g=Gm/r^2
- hmvince
- · Replies 4 ·
Discharging a capacitor through a resistor
- slain4ever
- · Replies 3 ·
Velocity of a Ball Thrown from a Building
- chawki
- · Replies 50 ·
What Was the Minimum Initial Kinetic Energy of a 7 kg Shot Put Thrown 18 Meters?
- JoeDoe
- · Replies 4 ·
Natural Log of Units: What Happens to the Units?
- Melawrghk
- · Replies 6 ·
Will the cart reach the end of the ramp?
- aeromat
- · Replies 5 ·
This question is giving me a headache Biot-Savart'
- flyingpig
- · Replies 18 ·
Calculating Maximum Height and Final Velocity: 2 Energy Problems on a Slope
- rain_ex
- · Replies 3 ·
Is My Equation for Finding Electric Potential in the Correct Form?
- VitaX
- · Replies 7 ·
Electric Scalar Potential and Electric Field Intensity
- EbenC
- · Replies 4 ·
Calculating Orbit Time of a Hypothetical Planet in the Asteroid Belt
- Phys221
- · Replies 1 ·
Solving Pascals Principle for Hydraulic Jack - F2 = 10.8N
- etothey
- · Replies 1 ·
"Calculate Resultant Force on Vertical Dam Wall
- etothey
- · Replies 3 ·
Calculating Pressure Difference in Two Tanks
- etothey
- · Replies 1 ·
Minimum Force for Overcoming Friction on a Wooden Box
- JoeDoe
- · Replies 1 ·
Ideal gas undergoes cycle process
- b_andries
- · Replies 1 ·
Rotation - constant properties when met force is 0
- cupid.callin
- · Replies 4 ·
Gravity in Tunnel Through Chord of a Planet
- schaefera
- · Replies 20 ·
Gravitational/Spring Potential Energy problem
- pelmel92
- · Replies 7 ·
How Far Are the Cosmic Ray and Photon at t=0s According to the Observer?
- roman15
- · Replies 2 ·
Keplers laws and kinetic energy
- sheetman
- · Replies 5 ·
Prove A^-1=(A^T A)^-1 A^T (matrices)
- blueyellow
- · Replies 2 ·
Find Work Done in Contour Integration of Vector Field: F=ix^2 +j2xy
- ssrtac
- · Replies 7 ·
Rotation - collision with an obstacle
- cupid.callin
- · Replies 1 ·
Easy Unit Conversions: How to Convert Kilojoules to Gallons
- mac227
- · Replies 1 ·
How Much Work Is Needed to Launch a Weather Monitor Into Space?
- crosbykins
- · Replies 2 ·
Need help in some concept questions
- so0lid
- · Replies 8 ·
Calculate Total Charge in Cube w/ Electric Field E = 2.0i − 3.0j
- vande060
- · Replies 2 ·
Change of Entropy in 10 Ohm Resistor at 300K
- Grand
- · Replies 3 ·
Calculate Inductance of Choke for AC Heater
- rammer
- · Replies 4 ·
Calculate Reflection & Transmission of Candle Flame Images in Glass Sphere
- BookofOdd
- · Replies 1 ·
Using the Superposition principle to solve a linear circuit
- Gabry89
- · Replies 2 ·
Coulomb's Law: Solving for Speed of Particle
- SupremeV
- · Replies 2 ·
Calculating Spring Compression of Ore Car on Downhill Mine Tracks
- Idividebyzero
- · Replies 4 ·
Magnetic and electric fields combined Help
- ServeSmasher
- · Replies 1 ·
How Does Mass Affect Velocity on an Incline?
- man0005
- · Replies 4 ·
Where does energy reside before earthquake?
- wkawish
- · Replies 1 ·
How to Calculate Heat Required to Boil Water?
- jle1092
- · Replies 1 ·
Rotation - Minimum force so that the block topple
- cupid.callin
- · Replies 5 ·
Calculating Electric Flux Through a Square: Is Gauss' Law the Only Method?
- stunner5000pt
- · Replies 6 ·
How Much Energy is Absorbed Elastically When a Person Lands on Their Feet?
- debzrie
- · Replies 3 ·
What Does "Respect of Time" Mean in Physics?
- trentt
- · Replies 2 ·
Explain how an atom may have a permanent magnetic dipole moment
- aarond90
- · Replies 1 ·
Can You Calculate the Required Brick Throwing Velocity to Hit a Moving Target?
- nice4life
- · Replies 5 ·
Understanding Weight and Acceleration in a Bird's Flight Using Physics
- vipulgoyal
- · Replies 4 ·
Objects Speed og a cylinder and hoop
- missnuss
- · Replies 1 ·
Calculate the energy associated with the magnetic field of a solenoid
- figureskater
- · Replies 4 ·
Solving Isothermal Process: Heat Supplied at Constant Pressure & Volume
- eliassiguenza
- · Replies 1 ·
How Does Centripetal Force Affect the Tension in a Whirling Rock on a String?
- rickkwa
- · Replies 2 ·
Calculating Force of Friction: 36N Applied to 6kg Cart with 5.5m/s Acceleration
- physicsdummy5
- · Replies 5 ·
Calculating Tension in Two Ropes
- kamalpreet122
- · Replies 1 ·
Tension force of an object on a slope
- Dakkers
- · Replies 5 ·
How Does Walter Lewin Explain Ampere's Law in Electromagnetism?
- flyingpig
- · Replies 3 ·
Young's Double Slit Homework: True/False?
- sona1177
- · Replies 2 ·
How to find a radius of a circular ring from a given equation
- raz23
- · Replies 1 ·
Masses on a rod inertia problem
- Staerke
- · Replies 1 ·
Calculating Orbital Speed and Period of a Weightless Satellite
- missnuss
- · Replies 1 ·
Another Angular Velocity question
- Lfrizz
- · Replies 9 ·
1D Elastic Collisions with air gliders
- aeromat
- · Replies 1 ·
Maximum Acceleration with Given Mass and Tension?
- kamalpreet122
- · Replies 9 ·
Radial velocity/magnitude/luminosity
- YEAH!
- · Replies 1 ·
Coefficient of static friction and minimum horizontal force
- kamalpreet122
- · Replies 2 ·
Calculate Time for Charging/Discharging Capacitor w/16V Battery
- IKonquer
- · Replies 1 ·
How in the world is current passing through?
- flyingpig
- · Replies 4 ·
Electrostatics - Point charge question
- joannananaa
- · Replies 3 ·
Damping ratio from a transfer function
- sgsawant
- · Replies 6 ·
Calculate Work of Vector Force in XY Plane
- Idividebyzero
- · Replies 1 ·
Work Done by Friction on 17.7 kg Block: Find Magnitude
- Idividebyzero
- · Replies 4 ·
How Do Newton's Laws Apply to Everyday Motion and Animal Adaptations?
- sodium40mg
- · Replies 3 ·
Calculating Distance Traveled with Changing Velocity
- AnomalyCoder
- · Replies 2 ·
Forces on current carrying wires
- flyingpig
- · Replies 12 ·
How Do You Calculate Time from Angular Velocity and Arc Length?
- Lfrizz
- · Replies 12 ·
Energy transfer, not sure how to do
- GunarsA
- · Replies 2 ·
Calculating magnitude and orientation of a resutanr force?
- williams06
- · Replies 1 ·
Concept questions - Laws of Motion
- page123
- · Replies 5 ·
Why is the RC circuit homework statement giving different results than expected?
- cupid.callin
- · Replies 7 ·
Two current carrying wires. Confusion
- flyingpig
- · Replies 18 ·
Trouble interpreting fictitious forces for block on wedge problem
- shadowplay
- · Replies 3 ·
Electric Potential and Electric Fields
- IKonquer
- · Replies 1 ·
What is the displacement equation for simple harmonic motion without damping?
- imagemania
- · Replies 4 ·
Uncertainties question (Kelvins and Celsius)
- jumbogala
- · Replies 1 ·
Why Is the Electric Field Not Zero Inside the Spherical Cavity?
- SupremeV
- · Replies 3 ·
Magnetic field at center of wire
- cupid.callin
- · Replies 1 ·
Electric potential and fields-capacitors
- smoics
- · Replies 4 ·
What is the Velocity of a Satellite Orbiting Earth at a Distance R?
- dvvv
- · Replies 7 ·
Earth and Sun - Gravity problem
- ova5676
- · Replies 1 ·