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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How Does an Inductor Affect Current Change Upon Switch Closure?
- Sho Kano
- · Replies 55 ·
How does conventional current flow through the first light-bulb?
- TiernanW
- · Replies 6 ·
Solve Half-Life Problem: Find # Atoms Decaying in 12 Days
- VjStylz
- · Replies 1 ·
Finding Tension in Rotating Rod: What is the Function of T(x)?
- manasi bandhaokar
- · Replies 4 ·
Pendulum and constraining forces (Lagrangian mechanics)
- JulienB
- · Replies 6 ·
Work done by force field F along two paths to (0,1,1)
- JulienB
- · Replies 39 ·
Energy lost from sphere due to spark
- Janiceleong26
- · Replies 2 ·
Cannon firing bullets into a log of mass 100m₀
- Karol
- · Replies 31 ·
Coloumbs Law when have 3 charges at unknown distances
- garypinkerton
- · Replies 4 ·
Transformer circuit with 1:100 turns ratio
- loki4000
- · Replies 8 ·
Conservation of Net Mechanical Energy in SHM
- Habez
- · Replies 3 ·
Finding the Spring Constant: Angular Velocity vs Hooke's Law
- Robert Hilderman
- · Replies 1 ·
Amplitude of spring after collision
- terryds
- · Replies 2 ·
Solve Velocity: 423,000=5504v+4.37v^3
- MeL82vin
- · Replies 4 ·
Finding acceleration with two perpendicular velocities
- OtterFace
- · Replies 3 ·
How Does Cooling Affect Pressure in a Sealed Water Container?
- physea
- · Replies 1 ·
Why specific latent heat of vaporisation > fusion?
- Janiceleong26
- · Replies 2 ·
Gauss' Law between infinite plates
- flintbox
- · Replies 10 ·
Thermodynamics and heat capacity
- struggles
- · Replies 5 ·
How Many Hydrogen Molecules Are in 1cm³ of a Balloon?
- lindi
- · Replies 1 ·
What is the final linear speed of a basketball rolling down an incline?
- df102015
- · Replies 10 ·
Destructive Interference in Water but not Air
- Ichigo449
- · Replies 2 ·
Variables and graphing for Young's double slit wavelength experiment
- supersub
- · Replies 11 ·
Consider two objects with m1, m2 connected by a light string
- Ab17
- · Replies 10 ·
Why Do Proton Beams Repel and Current-Carrying Wires Attract?
- physicsmaths1613
- · Replies 13 ·
Calculate the energy of the neutrino in the following decay
- pondzo
- · Replies 1 ·
What is the magnitude and direction of the current in conductor RS?
- terryds
- · Replies 3 ·
Coefficient of Static Friction = tan (angle of incline)
- lem0ncheezcake
- · Replies 4 ·
Armoured car firing missile on inclined plane
- Nate-2016
- · Replies 3 ·
How long will it take for the small cube to fall?
- terryds
- · Replies 11 ·
Extension of spring pulled at both ends
- terryds
- · Replies 5 ·
What is the spring constant of the spring?
- derphysiker09
- · Replies 9 ·
Spacetime diagram for black hole
- Rococo
- · Replies 1 ·
Special relativity question with lots of frames
- Kara386
- · Replies 5 ·
Normal reaction in banked road circular motion
- physea
- · Replies 4 ·
Electric field in two concentric conducting cylinders
- Ryaners
- · Replies 3 ·
Physical pendulum with no fixed pole
- bznm
- · Replies 87 ·
How Does the Angle of Force Application Affect Sled Movement?
- Ab17
- · Replies 23 ·
Temperature after mixing ice and water
- takando12
- · Replies 4 ·
Why is stopping potential measured in eV instead of V?
- struggles
- · Replies 4 ·
Calculating Velocity and Time Dilation in Special Relativity
- struggles
- · Replies 4 ·
Angular Momentum, Inertia and Kinetic Energy?
- AndreewL
- · Replies 5 ·
What is the physical dimension/unit of Probability current?
- EhrEnFeest
- · Replies 9 ·
Force equation for a massless pulley system with massive string
- struggles
- · Replies 4 ·
Resistance with resistors between parallel resistors
- TiernanW
- · Replies 5 ·
1D Kinematics: Distance between 2 cars
- Nikstykal
- · Replies 3 ·
Is energy in a standing wave time-dependent?
- Titan97
- · Replies 4 ·
Speed of rocket as viewed from Earth
- Rococo
- · Replies 4 ·
Calculating Electric Flux through a Square in the xy-Plane
- ehabmozart
- · Replies 7 ·
Projectile is fired over level ground
- Le_Anthony
- · Replies 4 ·
How Does Changing Variables Affect Light Diffraction Patterns?
- student07
- · Replies 9 ·
Are ray diagrams correct for a diverging or converging lens?
- Eveflutter
- · Replies 7 ·
How Do You Calculate Modulation Index and Sideband Amplitudes in FM Synthesis?
- MYMLA
- · Replies 2 ·
Displacement-Time Graph of a bouncing ball
- Jeven
- · Replies 14 ·
Two reels rolling without slipping
- bznm
- · Replies 4 ·
Magnetic Induction: Homework Help
- mick5000x
- · Replies 3 ·
Reading an Analog Meter, given ranges
- Sarah Dabaja
- · Replies 11 ·
Charged particle in Electric and Magnetic field
- Vibhor
- · Replies 33 ·
Force of impact for human falling different heights
- brettsyoung
- · Replies 5 ·
Newton's Laws -- Resting hockey puck hit with a force
- Evangeline101
- · Replies 8 ·
Angular acceleration on a pulley
- df102015
- · Replies 5 ·
Max height of a concrete column
- Quantum Singularity
- · Replies 7 ·
Newton's third law: Rower makes boat move forward
- Evangeline101
- · Replies 2 ·
Ice melted by impact of lead bullet
- Erenjaeger
- · Replies 10 ·
What is the minimum kinetic energy for this roller coaster ride?
- rrosa522
- · Replies 2 ·
What Is the Correct Formula for Calculating Power in Rotational Motion?
- RoboNerd
- · Replies 20 ·
Why do we use the physical quantity work to measure energy?
- n124122
- · Replies 6 ·
Static equilibrium of beam on two piers with man
- RoboNerd
- · Replies 18 ·
Determine the mass moment of inertia of the assembly
- Pascal1p
- · Replies 6 ·
Understanding solution method for finding accelerations in a mechanical linkage
- whitejac
- · Replies 3 ·
Angular momentum of a satellite
- RoboNerd
- · Replies 7 ·
Finding ratio of masses of two blocks
- RoboNerd
- · Replies 4 ·
Two movable wires in Magnetic Field
- Vibhor
- · Replies 32 ·
Questions on an end of the year project
- ollie_craw
- · Replies 5 ·
Electron Velocity Diffraction Grating Problem
- Amad27
- · Replies 4 ·
Finding the acceleration of 2 blocks
- engphys204
- · Replies 18 ·
Finding the number of solenoid loops from wire thickness
- kevinnn
- · Replies 1 ·
Conceptual Question on Angular Momentum.
- Sahil Kukreja
- · Replies 3 ·
[Energy] Work on a vertically thrown object
- brbrett
- · Replies 2 ·
Path of object with equal constant accelerations in two dimensions
- RoboNerd
- · Replies 9 ·
What is the Speed of a Block After Traveling 0.9 m Up an Inclined Plane?
- Quantum Singularity
- · Replies 2 ·
Determining Direction of Magnetic Force on a Moving Bar Magnet Near a Wire Loop
- nickr96
- · Replies 4 ·
How Does a Flywheel Begin to Move with Constant Speed After Adding a Mass?
- physea
- · Replies 5 ·
Work problem, box moves at h=.25 with F=85N
- edgarpokemon
- · Replies 4 ·
Double-slit experiment: What is the speed of the neutrons?
- kamhogo
- · Replies 3 ·
Conversion between two Harmonic Angular Motion
- DFornazari
- · Replies 1 ·
Static friction between stacked boxes with applied force
- RoboNerd
- · Replies 6 ·
Trigonometry in tension problem with inclined mass
- Xari
- · Replies 2 ·
Does mass affect the amount of work done?
- n124122
- · Replies 2 ·
When will the acceleration of a particle be zero?
- Quantum Singularity
- · Replies 6 ·
Is the electric field zero outside a coaxial cable due to charge cancellation?
- jendrix
- · Replies 10 ·
Question on finding maximum magnitude of acceleration
- RoboNerd
- · Replies 12 ·
Question on torques. quick one.
- RoboNerd
- · Replies 5 ·
Question kinetic energy in circular motion
- RoboNerd
- · Replies 2 ·
What is the velocity of a rod released inside a cart?
- Titan97
- · Replies 8 ·
Implementing angular momentum approach in problem
- RoboNerd
- · Replies 5 ·
Question on elementary statics multiple choice
- RoboNerd
- · Replies 3 ·
Calculating the boil-off rate of liquid helium
- NZPhysics
- · Replies 1 ·
Understanding cross product and direction of torque
- Orha
- · Replies 4 ·
Magnetic Force on Electric Currents
- Mikala
- · Replies 1 ·