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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Differential Difficulties in an RL Circuit Problem
- Geromy
- · Replies 13 ·
Steel density calculation giving wrong values in Excel
- TalRoc
- · Replies 6 ·
Calculating Fundamental Frequency and Overtone Frequency of a Stretched Wire
- i'mcheche
- · Replies 2 ·
Tensions and centripetal acceleration
- fogvajarash
- · Replies 13 ·
Orbital motion electron (quantum)
- hvthvt
- · Replies 2 ·
Waves and Sound - Air Column (Clarinet)
- harujina
- · Replies 7 ·
Effective Magnetic Field in Ground-State Hydrogen Atom?
- hvthvt
- · Replies 1 ·
Why Does the Surface of a Liquid Slope When the Container is Accelerated?
- andyrk
- · Replies 1 ·
What is its rotational kinetic energy?
- Elleboys
- · Replies 4 ·
Why does a balloon move forward in an accelerating truck?
- bananabandana
- · Replies 14 ·
Heat engine cycle with isothermal, isobaric and isochoric processes
- ricebowl07
- · Replies 5 ·
Waves and Sound: Find Moving Train Speed
- harujina
- · Replies 1 ·
Depth using Work, Weight, Height
- randomjunebug
- · Replies 14 ·
Centripetal Force - My conclusions are correct?
- Prometium
- · Replies 18 ·
Period of A Pendulum With Moveable Mass
- Wreak_Peace
- · Replies 5 ·
How Much Energy Is Lost When a Sledgehammer Hits a Stationary Merry-Go-Round?
- Tanero
- · Replies 10 ·
Heat engines and finding efficiency
- BOAS
- · Replies 14 ·
Missing mass in rotating Andromeda galaxy
- cherioslover
- · Replies 1 ·
What Is the Angular Speed of a Falling Ruler at 30 Degrees?
- Ruitker
- · Replies 3 ·
How Does Observer Velocity Affect Sound Wavefront Frequency?
- Tanero
- · Replies 3 ·
What is the pressure in the middle of a vortex?
- PhyIsOhSoHard
- · Replies 2 ·
What Determines the Initial Conditions in Spring-Mass System Problems?
- MathewsMD
- · Replies 2 ·
Voltage Used to Fire an Electron
- burnst14
- · Replies 7 ·
Kinematic Equations for Projectile Motion
- Striders
- · Replies 29 ·
How to determine angle of net force-electric charges of right triangle
- Coco12
- · Replies 9 ·
What is the phasor form for an E field with a variable distance and phase shift?
- cutesteph
- · Replies 1 ·
Angular Acceleration due to Light Waves
- JackFlash
- · Replies 5 ·
Solve Efficiency Problem: Heat Water in 1000 W Electric Kettle
- physicsnerd7
- · Replies 5 ·
Two Blocks on an Incline(picture)
- Dan350
- · Replies 2 ·
What is the velocity of a sliding ladder in respect to the wall and bottom?
- Rugile
- · Replies 5 ·
Maximum shear stress and angle of twist for a rotating shaft
- ball
- · Replies 1 ·
Wet floor sign falling and hitting a foot - force and energy
- nonlosoproprio
- · Replies 8 ·
How do you calculate the magnetic moment of the ground state of Calciu
- zhillyz
- · Replies 4 ·
Waves and Sound - Bat Chirp/Echo?
- harujina
- · Replies 7 ·
When do two spheres meet, one thrown up and one dropped?
- medinat16
- · Replies 2 ·
Spin 1 Particle in a time dependant magnetic field
- richyw
- · Replies 7 ·
Projectile hits rod hanging from pivot.
- BOYLANATOR
- · Replies 5 ·
Parallel axis theorem with negative area from cutout
- LeFerret
- · Replies 5 ·
Matrix of Hamiltonian, system's state - quantum
- Dassinia
- · Replies 1 ·
Rotational Dynamics of a Motor-Driven Drum System
- Dan350
- · Replies 1 ·
Moment of Inertia of a Thin Rod about its Center
- PsychonautQQ
- · Replies 2 ·
Relativistic Doppler effect calculation
- mintsnapple
- · Replies 5 ·
Solving Yo-Yo Force Problem: Find Acceleration & Friction Force
- Ruitker
- · Replies 1 ·
Interference of Light - Thin Film
- GreenPrint
- · Replies 8 ·
Two liquids are inside of a U-tube, which
- PhyIsOhSoHard
- · Replies 6 ·
Impact of a Fluid Jet Experiment
- SherlockOhms
- · Replies 9 ·
Gravitational force and normal force.
- jimmyboykun
- · Replies 2 ·
Finding time given constant acceleration, initial velocity, & distance
- Brent. T
- · Replies 9 ·
Conceptual: two positive point charges value of E
- origamipro
- · Replies 2 ·
Block pushed by time-varying force: momentum, speed, and power
- Tanero
- · Replies 1 ·
Why Is \(\frac{\partial \dot{q}}{ \partial q} = 0\) in Lagrangian Mechanics?
- AJKing
- · Replies 2 ·
Determining the direction of magnetic vector potential
- bfusco
- · Replies 1 ·
Moment of inertia of circular flywheel
- KiNGGeexD
- · Replies 8 ·
Gravity and uniform circular motion involving a loop?
- Ascendant78
- · Replies 4 ·
Find the magnetic field of a uniformly magnetized sphere.
- bfusco
- · Replies 7 ·
Spring Constants and Conservation?
- franfran
- · Replies 9 ·
Kinetic Energy of a Rotating Hoop - Physics Forum
- rmfw
- · Replies 3 ·
The Doppler Effect - Finding Velocity of Source
- harujina
- · Replies 18 ·
Can electron have proper velocity of c in SR problem?
- sigma_
- · Replies 1 ·
The Magnetic Field in a Charging Capacitor
- cjavier
- · Replies 4 ·
Yoyo pulled horizontally with string on spindle: finding acceleration and friction
- wr8899
- · Replies 6 ·
Calculating Volume of Firecracker Explosion at 100m Above Ground
- Panphobia
- · Replies 25 ·
Rocket Velocity and Acceleration Calculation
- wr8899
- · Replies 9 ·
Bucket whirled in vertical circle: tension and speed at top
- SmallPub
- · Replies 4 ·
Final velocity and total mass of train car below hopper
- oddjobmj
- · Replies 27 ·
Rotational Inertias of Different Shapes
- Meta14
- · Replies 1 ·
Rotational Inertia about Rotation Axis Through COM
- Reefy
- · Replies 2 ·
Why does Heisenberg's uncertainty principle use h/2π instead of (1/2)(h/2π)?
- bmrick
- · Replies 3 ·
Calculating Reaction Forces and Maximum Weight for Uniform Plank on Two Trestles
- Apothem
- · Replies 8 ·
Water Flow in Free Fall: Observing the Equivalence Principle
- canada747
- · Replies 1 ·
Calculus Problem: Braking Distance for Initial Speed 4v
- Shinaolord
- · Replies 5 ·
How Is Torque Equilibrium Applied to a Sphere Tethered to a Wall?
- accioquote
- · Replies 5 ·
Finding direction of area vector for curved surfaces like cylinders and spheres
- bfusco
- · Replies 1 ·
What is the maximum compression of the spring xmax during the collisio
- Elleboys
- · Replies 2 ·
Bullet hits cylinder angular speed
- AltruistKnight
- · Replies 1 ·
Simple frequency quantum question
- hvthvt
- · Replies 2 ·
Can the bullet be much heavier than the string?
- Magnolial
- · Replies 1 ·
How Do You Calculate Young's Modulus from Tensile Stress and Strain Data?
- anthonyk2013
- · Replies 23 ·
Bullet passes through block - conservation of momentum
- danielamartins
- · Replies 5 ·
Linear Polarizers and Light Intensity
- Physics105kid
- · Replies 8 ·
Acceleration question (circular motion)
- SmallPub
- · Replies 8 ·
How do I know which Lorentz trasnform equations to use?
- Kushwoho44
- · Replies 1 ·
Speed Up to Catch Leader in 10km Race
- negation
- · Replies 5 ·
Calculating the Velocity and Time of a Freely Falling Rock
- ThiagoG
- · Replies 2 ·
Quantum mechanics probability detection
- hvthvt
- · Replies 6 ·
Calculating Stopping Potential with a Filtered Light Source
- yaylee
- · Replies 1 ·
What Is the Shortest Wavelength Photon an Electron Can Emit in a Quantum Trap?
- hvthvt
- · Replies 1 ·
Particle rolling around inside of hemispherical bowl
- JohnDough
- · Replies 1 ·
Extreme situations in physics problems
- fogvajarash
- · Replies 2 ·
AC circuit and standing wave questions
- Violagirl
- · Replies 7 ·
Determining the Frequency Heard by a Helicopter from a Parachutist's Shout
- nickb145
- · Replies 6 ·
Reducing Stopping Time with Antilock Brakes
- negation
- · Replies 4 ·
Experimentally determining if g depends on mass
- Raze
- · Replies 9 ·
Period of the pulley-spring system
- ngan_ngong
- · Replies 10 ·
Elastic Neutron Collision (Conservation of Momentum and Energy?)
- frownifdown
- · Replies 23 ·
What Is the Stopping Potential When Using a Cut-Off Frequency Filter?
- yaylee
- · Replies 1 ·
The Photoelectric effect, Part 2
- yaylee
- · Replies 2 ·
Center of Mass problem: 40kg child on a boat catching a turtle
- saskiwi4
- · Replies 1 ·
Maximum Velocity of a Falling Ball on a Spring
- Patolord
- · Replies 2 ·
How far will the trampoline compress when a person jumps on it?
- lollikey
- · Replies 5 ·