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 an unknown resistor
- Ry122
- · Replies 6 ·
DC Motor: Rotating Coil in Magnetic Field
- Ry122
- · Replies 1 ·
Why does differentiating y = A cos(kx - ωt) twice give -Ak² cos(kx - ωt)?
- Davio
- · Replies 5 ·
Photon, Wave/Particle Nature of light questions
- AznBoi
- · Replies 9 ·
Light TRAVELLING/ANGLES OF INCIDENCESEECT
- strawberry7
- · Replies 3 ·
Magnetic Field's Effect on a Charg[ed Particle]
- mbrmbrg
- · Replies 16 ·
Find the rotational inertia of a rod about a pivot
- Kelseywelsey
- · Replies 2 ·
Physics of Computers ( for topics)
- NyteFlyte
- · Replies 11 ·
Potential difference and kinetic energy between plates
- kbyws37
- · Replies 4 ·
Calculate the force experienced by a fixed surface
- jainabhs
- · Replies 2 ·
Why calculate impulsive tension on only one mass in a two-mass system
- Bucky
- · Replies 1 ·
Two cargo ships (Fluid Mechanics)
- prophet05
- · Replies 1 ·
Solving an Oscillating Block's Period and Speed
- prophet05
- · Replies 1 ·
Solving Torque Equalibrium Problem for Beam and Boy
- prophet05
- · Replies 1 ·
Light intensity, Max KE of photoelectrons
- AznBoi
- · Replies 11 ·
Electric field derivation question
- afromanbob
- · Replies 1 ·
Computational Physics Project Ideas
- savedbynails
- · Replies 5 ·
How Does a Positively Charged Oil Drop Behave in a Uniform Electric Field?
- kbyws37
- · Replies 1 ·
How Is Angular Acceleration Calculated for a Rotating Door?
- owura143
- · Replies 5 ·
Does E=mc² apply to both nuclear reactors and batteries?
- ceenik
- · Replies 2 ·
How Do You Calculate the Force Needed to Move a Block Across the Ground?
- monkeyhead
- · Replies 7 ·
Forces on a boom with tie support in a crane model
- unique_pavadrin
- · Replies 7 ·
Why is work by applied force greater than work against gravity on an incline?
- ritwik06
- · Replies 9 ·
Work example wrong in my text? (it's driving me bonkers)
- User1247
- · Replies 19 ·
Finding unknown charge when electric field is zero on the x-axis
- kbyws37
- · Replies 7 ·
How Quickly Does a Leaf Heat Up Under Sunlight?
- kbyws37
- · Replies 8 ·
What Causes a Transformer with 240V Input to Have No Output?
- Ry122
- · Replies 1 ·
How Does Scale Factor Affect Objects in Expanding Universe?
- kingwinner
- · Replies 1 ·
How Do You Calculate Electric Fields and Forces in These Three Physics Problems?
- claudiadeluca
- · Replies 1 ·
Find R when equivalent resistance doubles with switch closed
- ianb
- · Replies 3 ·
Mechanics Physics: Pulley w/ 2 Blocks - Determine T, T3, Tl, I1
- princess_7777
- · Replies 1 ·
How are electricity and magnetism related?
- AznBoi
- · Replies 8 ·
Flux, Luminosity, Distance, Size
- kingwinner
- · Replies 2 ·
Work done pulling wagon with friction and applied force at an angle
- User1247
- · Replies 4 ·
How Much Mass Does the Sun Lose Each Day?
- verbose
- · Replies 1 ·
Finding the Mass Ratio of Planets Using Newton's Theory of Gravity
- Weave
- · Replies 6 ·
Parallel/series, calculate current drawn
- mikefitz
- · Replies 4 ·
Bullet hits door, find angular velocity
- aliaze1
- · Replies 6 ·
Forces Acting on Pendulum at Point P
- harmonicmotion
- · Replies 3 ·
Two Resistance Problems (Circuits)
- AngeloG
- · Replies 3 ·
Solid state - crystallisation energy
- kel
- · Replies 2 ·
What does TV^(gamma-1) mean in thermodynamics?
- grscott_2000
- · Replies 1 ·
Missing the point Tangential acceleration
- Saladsamurai
- · Replies 7 ·
Newton's 1st Law: Incl in 2nd Law? Reasons/Ex
- riddler5280
- · Replies 4 ·
Stress exam question
- rednaiL
- · Replies 7 ·
What is the work done by a hiker who is climbing up a hill
- Weave
- · Replies 7 ·
Fluids and pressure with kinematics
- emag
- · Replies 10 ·
Why Is a Moving Meter Stick Measured at 80 cm Assumed to Be 100 cm at Rest?
- cmantzioros
- · Replies 1 ·
What is the Correct Temperature Yesterday?
- jrs
- · Replies 2 ·
Cylinder about side, finding angular velocity
- aliaze1
- · Replies 3 ·
Understanding Light and Lens Problems in Physics
- jst
- · Replies 5 ·
Edit to Tangential Accelerationmissing point
- Saladsamurai
- · Replies 3 ·
Bowling ball rolling up a 0.760-m vertical rise
- Kelschul
- · Replies 5 ·
Does centripetal force act on a body or is it pseudo?
- i.mehrzad
- · Replies 6 ·
How Does a Spring-Loaded Mass Behave on a Moving Conveyor Belt?
- cbjewelz
- · Replies 3 ·
Thermodynamics and Atomic/Nuclear Physics Left to self-study. Which one first?
- AznBoi
- · Replies 4 ·
What would hapen to coefficent of spring if we cut it
- reza
- · Replies 8 ·
Magnetic field due to negative charge
- cuddlesome
- · Replies 1 ·
Where is the Compton effect used and why is it important
- burcuva
- · Replies 7 ·
How Does Altitude Affect TV Signal Interference?
- simplicity12
- · Replies 1 ·
How Do I Find the Distance Between Two Waves in Superposition?
- bilals
- · Replies 2 ·
Finding particle velocity from magnetic rigidity equation
- swordsworn2930
- · Replies 2 ·
Find Lv for Calorimeter Problem
- erdfcvtyghbn
- · Replies 1 ·
Newton's Rings and plano-convez lens
- simplicity12
- · Replies 1 ·
Calculating Momentum and Speed in a Collision
- thomas49th
- · Replies 4 ·
Force law for elliptical motion with constant parameters
- vle1
- · Replies 6 ·
Understanding Transverse Wave Pulses
- bilals
- · Replies 2 ·
Relativistic vs non-relativistic momentum
- daisy7324
- · Replies 3 ·
Does an Atomic Bomb's Explosion in a Contained Box Affect Its Weight?
- bwilhelm
- · Replies 1 ·
Seemingly Simple Statics Problem
- lugita15
- · Replies 9 ·
Centripetal acceleration and angles
- Bjamin0325
- · Replies 1 ·
What Causes Small Scale Patterns at Antinodes in Standing Sound Waves?
- donc
- · Replies 2 ·
Difference between flow rate and velocity
- grscott_2000
- · Replies 1 ·
Magnetic field strength from charge during 180° coil rotation
- Brewer
- · Replies 9 ·
Why does cos(90°) = 0 make flux zero when field is perpendicular to the loop?
- iamtrojan3
- · Replies 9 ·
What Minimum Kinetic Energy is Required for Electrons to See an Atom?
- aquabum619
- · Replies 1 ·
Finding latent heat of fusion with calorimeter and calculating percent error
- erdfcvtyghbn
- · Replies 1 ·
Find Period of Pendulum's Oscillation with 1-60 Degrees
- KitusFanaticus
- · Replies 8 ·
Solve Columns Law Problem: Magnitude of 3rd Charge
- iamtrojan3
- · Replies 5 ·
Roller coaster K/P energy problem wheeeee
- legking
- · Replies 9 ·
Force applied by parent pulling a wagon at constant speed
- ND3G
- · Replies 6 ·
Equivalent Resistance in battery
- mbrmbrg
- · Replies 7 ·
Domino Experiment: Time Dependence on Number of Dominoes
- cerebro
- · Replies 3 ·
Reduced mass for an infinite mass and a finite mass?
- cbjewelz
- · Replies 1 ·
Line spectrum and energy levels
- Joules23
- · Replies 2 ·
Solving Magnetism Problem: Determine Force per Unit Length
- neelakash
- · Replies 1 ·
Conservation of Angular Momentum in a Three Mass System
- neelakash
- · Replies 3 ·
Contracting sphere: angular velocity when radius shrinks to 1/nth
- neelakash
- · Replies 5 ·
Finding the focal length of the lense
- Aladin
- · Replies 3 ·
Known problem appears difficult
- neelakash
- · Replies 7 ·
How does friction affect the results of the ticker tape experiment?
- shinks
- · Replies 2 ·
Calculate Velocity Using Bernoulli's Equation
- grscott_2000
- · Replies 1 ·
Centre of mass is a unique point
- neelakash
- · Replies 4 ·
Gas turbine combustion with methane: finding air-fuel ratio for 1200K
- simonre7
- · Replies 1 ·
Why is image distance f(n+1) for a converging lens with n times magnification?
- 7Kings
- · Replies 8 ·
Calculating Work on Equipotential Surfaces
- threewingedfury
- · Replies 5 ·
Gravitational attraction problem
- uha1
- · Replies 3 ·
Calculating Heat Energy Generated from Work and Power
- husky88
- · Replies 5 ·
Why do sparks occur only on a dry day?
- rootX
- · Replies 1 ·