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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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 ·
Solve Depth of Pool w/ Snell's Law
- BadatPhysicsguy
- · Replies 7 ·
Wheatstone bridge, only one R value known
- Samuelriesterer
- · Replies 30 ·
What charges maximize and minimize the force between two objects?
- deldel
- · Replies 3 ·