Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What is the magnetic field due to a ribbon of current-carrying wires?
- samjohnny
- · Replies 3 ·
What is the direction of friction on a plate on two rotating wheels?
- lavankohsa
- · Replies 2 ·
Conservation of energy of a skier
- brycenrg
- · Replies 2 ·
Why does a charged capacitor transfer only 70% of its charge to an uncharged one?
- jagguy
- · Replies 1 ·
Find the Total Distance Traveled by an Accelerating Object
- Aromire
- · Replies 5 ·
Calculating the Impact Speed of a Bullet Fired Straight Up
- Ineedhelp809
- · Replies 6 ·
Where did I go wrong in my solution?
- kdb94
- · Replies 4 ·
Bungee jump height/spring energy
- Matt123456789
- · Replies 7 ·
Expressing Newton's 2nd law in terms of momentum
- Calpalned
- · Replies 8 ·
A Child throws a ball vertically upwards, then catches it
- lasisdabomb
- · Replies 3 ·
Magnetic Interaction: parallel rods, cross bar free to slide
- MaryCate22
- · Replies 1 ·
Moment of Inertia of ceiling fan
- Colleen Walsh
- · Replies 5 ·
How many electrons make up a charge of -90.0μC ?
- Orhan
- · Replies 8 ·
Parallel-plate capacitor with 2 dielectrics?
- Destroxia
- · Replies 8 ·
Calculating Electric Field and Force Between Charged Rings
- littlejon
- · Replies 1 ·
How Is the Net Electric Field Calculated at a Point in a Square of Charges?
- littlejon
- · Replies 1 ·
Force between polar molecule and an ion
- Westin
- · Replies 19 ·
Resultant acceleration Question
- Steelers72
- · Replies 16 ·
Why does conservation of momentum work but not energy for this collision?
- henry3369
- · Replies 3 ·
Applying Bernouilli to calculate pressures
- Xengine
- · Replies 7 ·
Asteroid colliding with a planet
- henry3369
- · Replies 1 ·
How can there be work due to torque?
- henry3369
- · Replies 2 ·
How Do You Calculate Angular Acceleration of a Salad Spinner?
- Steelers72
- · Replies 9 ·
Finding Power Ratio of Two Pulley Systems
- henry3369
- · Replies 1 ·
Which Direction Does the Force on the Electrons Act in a TV Tube?
- mshiddensecret
- · Replies 18 ·
Resistivity mean free path and scattering time of copper
- SMC
- · Replies 1 ·
Angular speed of rotating hoop
- henry3369
- · Replies 3 ·
Using moon's rotational energy on earth
- henry3369
- · Replies 2 ·
Finding foil thickness for equal X-ray absorption with different materials
- jagguy
- · Replies 3 ·
Hunter's Recoil Speed from Rifle Shot
- henry3369
- · Replies 3 ·
How Does Force Distribution Affect Tension in an Elastic Plank?
- andyrk
- · Replies 28 ·
Energy stored in parallel plate capacitor
- xamy
- · Replies 2 ·
Potential and work done by the charge
- xamy
- · Replies 2 ·
Rolling without slipping and coefficient of friction
- henry3369
- · Replies 2 ·
Coulomb's law vs. Newton's law of gravitation?
- Brian S.
- · Replies 7 ·
Why does my inclined plane experiment show a ∝ m instead of a ∝ 1/m?
- Worfie
- · Replies 5 ·
Diffraction Gratings and Incident Light
- Dgray101
- · Replies 1 ·
Calculating standard deviation for average force
- jb007
- · Replies 2 ·
Simple kinematics with friction
- fishinsea
- · Replies 1 ·
Inf. Parallel Plate Capacitors and Potential Energy
- kevtimc25
- · Replies 4 ·
Is there something as instanteneous intensity of a wave?
- Coffee_
- · Replies 1 ·
Semicircular rod and Electric Potential Question
- kevtimc25
- · Replies 3 ·
Problem of manometry. Is it resolved correctly?
- Queren Suriano
- · Replies 2 ·
Parallel wires carrying current out of the page, find B
- Dextrine
- · Replies 1 ·
Problem with understanding Babinet's principle
- Coffee_
- · Replies 1 ·
1-D elastic collision between proton and nucleus
- kingsmaug
- · Replies 4 ·
What is the minimum height for an object to complete a loop without friction?
- Ishaan S
- · Replies 3 ·
Rotational Period of Large Body
- GypsySmash
- · Replies 6 ·
Sliding down the curved/straight slide
- cloveryeah
- · Replies 2 ·
Resistor Network Circuit Analysis
- Dhooy7
- · Replies 3 ·
Force to stop a rotating object
- Phys185Help
- · Replies 2 ·
Magenetic field due to wire and cyllinder
- samjohnny
- · Replies 20 ·
Magnetic Field inside plate
- deedsy
- · Replies 2 ·
Calculating Net Charge in a Parallelepiped at Inclined Faces
- Ozmahn
- · Replies 7 ·
How Do You Calculate the Final Temperature of a Glass Pot and Oil?
- H=Leo
- · Replies 9 ·
Girl grabbing a box mid-air: when is momentum conserved?
- henry3369
- · Replies 5 ·
Moment of Inertia of 4 Balls on Square Side
- erisedk
- · Replies 3 ·
Calculating Power Output of an Automobile Engine
- Abid Rizvi
- · Replies 5 ·
Conical pendulum velocity calculation with 170 kg mass
- goonking
- · Replies 17 ·
Electric Potential Energy and Sign
- always_tired
- · Replies 6 ·
Understanding Work and Energy: Solving a Physics Problem with a Spring
- jared bernstein
- · Replies 2 ·
Minimum Speed for Balsa Cube Tipping Problem
- T$$$
- · Replies 3 ·
Height and horizontal distance of a projectile
- theaman
- · Replies 2 ·
Object and Incline Colliding: Velocity and Height at Highest Point
- bob123ed
- · Replies 3 ·
Why won't any electrons flow through the resistor R2?
- Plutonium88
- · Replies 3 ·
Newton's Second Law. Involving an airplane.
- Trevor Mock
- · Replies 2 ·
Unsure where g term comes from? in this equation
- trojan15
- · Replies 12 ·
How Do You Calculate Maximum Speed from a Non-Constant Acceleration Time Graph?
- Suraj M
- · Replies 18 ·
Find the force of friction provided by the floor
- MadMcB
- · Replies 15 ·
Charge inside of Conducting Shell
- Jzhang27143
- · Replies 2 ·
What is the tension in the right cable?
- MadMcB
- · Replies 4 ·
Find Velocity and Position of Mass on Frictionless Table
- Cake
- · Replies 15 ·
Drawing up a liquid by forward motion of a tanker
- annnoyyying
- · Replies 15 ·
Energy conservation in Special Relativity
- AllRelative
- · Replies 1 ·
Tension in string and oscillation
- gasar8
- · Replies 14 ·
Induced Voltage of a Magnetic Field passing through a loop
- abstrakt!
- · Replies 10 ·
Maximum speed of car on level circular track with friction
- parabola
- · Replies 6 ·
2D Collision of 3 Billiard Balls
- Europa
- · Replies 11 ·
Two conducting spheres with charges 3q and -q
- deldel
- · Replies 7 ·
Determine the magnitude of force on a suspended object
- MadMcB
- · Replies 11 ·
Location of object that forms an image in 2 lens system
- Phynos
- · Replies 9 ·
System in static equilibrium given a nudge. What happens?
- Blythe
- · Replies 3 ·
Heat Transfer-How long will it take for a material to heat up
- Matthias85
- · Replies 10 ·
Vertical pressure on soft drink can
- reshald
- · Replies 3 ·
Spherical capacitor with 51.8 mm and 55.0 mm radii
- Destroxia
- · Replies 6 ·
Finding equivalent resistance in RL circuit with step input
- sugz
- · Replies 7 ·
Derivation of Ee in Inverse Compton Scattering
- Alkass
- · Replies 7 ·
Why opposing current loops repel if field forces seem to cancel
- friendbobbiny
- · Replies 4 ·
Linear Collisions: Find Max Compression of Spring
- Merms
- · Replies 2 ·
Coulomb's Law, finding acceleration direction
- loukiz
- · Replies 3 ·
Determining the forces in three cables.
- cavalieregi
- · Replies 3 ·
How Much Air Does a 600W Hair Dryer Circulate Per Second?
- YarnJunior
- · Replies 6 ·
Does the refractive index law change according to the medium
- Syndy
- · Replies 4 ·
Simple application of Coulomb's Law/Equation
- kostoglotov
- · Replies 13 ·
Galilei and Speed: Solving a Cat and Object Problem
- Mayaaaa
- · Replies 1 ·
Induced EMF, bar moving through magnetic field
- timnswede
- · Replies 4 ·
Air bubble volume at surface using ideal gas law
- Jimmy87
- · Replies 2 ·
Work done by monoatomic ideal gas
- whatisreality
- · Replies 19 ·
Equivalent resistance in a complex circuit
- PhysicsMan999
- · Replies 4 ·
Mirroring using a concave mirror
- BadatPhysicsguy
- · Replies 1 ·