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 to Determine Temperature Difference Between Two Stars Using Spectral Lines?
- Zapped17
- · Replies 0 ·
A sphere held steady on a slope by a rope
- Theexploer
- · Replies 7 ·
Why is force negative in F=Ax^(1/3) when velocity is v=-3t^2?
- MatinSAR
- · Replies 6 ·
Refractive index of seawater and a diver transmitting RF for 100 meters
- xphrnzrjh
- · Replies 3 ·
Bead sliding along wire with constant horizontal velocity -- Shape of wire?
- zenterix
- · Replies 2 ·
Forces applied to a spring-loaded gas pedal
- Theexploer
- · Replies 7 ·
Index Notation, Identity Matrix
- PhDeezNutz
- · Replies 4 ·
Create a physics problem for me!
- silento
- · Replies 5 ·
The movement of a package on a conveyor belt
- Losmonkeys17
- · Replies 2 ·
Calculate how much weight the crane could lift
- Clueless87
- · Replies 3 ·
Energy stored in a double spring system
- sdfsfasdfasf
- · Replies 17 ·
Torque calculation based on distributive load
- arihantsinghi
- · Replies 5 ·
How Much Explosive Force is Needed to Overcome Drag and Elevate a Car?
- vbottas
- · Replies 9 ·
How should this Beam Loading experiment be designed?
- Physical_Fire
- · Replies 10 ·
Surface area of inclined XY plane at 45 degrees
- marciokoko
- · Replies 4 ·
Two masses on a slope with a connected tension force
- willis123
- · Replies 5 ·
How to write this expression in terms of a Hyperbolic function?
- Safinaz
- · Replies 6 ·
(Magnetism) Magnetic pull force on a steel ball
- amoghthebad
- · Replies 4 ·
Why is the Bridge Crane Force 2820 N?
- TheePhysicsStudent
- · Replies 2 ·
Gauss' law for a cavity in an insulator
- laser
- · Replies 2 ·
Punching a hole in a tape moving at relativistic speed
- FranzDiCoccio
- · Replies 26 ·
Fast and Furious Scene Analysis
- silento
- · Replies 47 ·
Can the polarity at the 2 ends of a solenoid be the same in normal conditions?
- MadMax_8228
- · Replies 2 ·
Special relativity and standard configuration
- greg997
- · Replies 40 ·
Calculating Force and Acceleration in a Two Block System with Varying Friction
- BEORTA39
- · Replies 6 ·
How to calculate velocity of infinite-stage rocket?
- zenterix
- · Replies 2 ·
How does burn time affect the parameters in the rocket equation?
- zenterix
- · Replies 2 ·
Finding speed of a mass in circular motion with tension
- dcmf
- · Replies 5 ·
Conservation Laws and Velocity Reversal in 1D Collisions
- skoczek77
- · Replies 10 ·
Final Velocity of a car with a opposing decreasing drag force
- vbottas
- · Replies 57 ·
Can You Convert Meters to Kilograms?
- MeesaWorldWide
- · Replies 26 ·
Kinetic Energy being larger than Mechanical Energy in a Hotwheels Lab
- MrSand
- · Replies 16 ·
Amplifier gain in resonant RLC circuit
- Meow12
- · Replies 5 ·
How does a difference in air pressure induce a force?
- eddiezhang
- · Replies 15 ·
Having a hard time learning Newton's 2nd law
- Sixty4Fairlane
- · Replies 5 ·
How Do You Incorporate Drag Force in Free Body Diagrams for Multiple Objects?
- MeesaWorldWide
- · Replies 1 ·
What is the definition of the dalton (Da) unit?
- heroslayer99
- · Replies 10 ·
Magnetic field due to electric wire
- Silver2007
- · Replies 6 ·
Calculate the magnetic moment of a rotating sphere
- LeoJakob
- · Replies 17 ·
Ejected out from an accelerating spaceship
- brotherbobby
- · Replies 5 ·
Find the man's tension pulling the rope
- Adam Hanns F A Cong
- · Replies 4 ·
Calculate density of neutrons in a beam
- xatu
- · Replies 8 ·
How does the rise in temperature of fuse wire depend upon its radius?
- Darshit Sharma
- · Replies 12 ·
Why does the walker see a stationary river when moving at the same speed?
- MatinSAR
- · Replies 23 ·
Catching a loaf of bread thrown vertically at a window
- brotherbobby
- · Replies 25 ·
Can the Magnetic Field Be Determined Using Biot-Savart Law Superposition?
- LeoJakob
- · Replies 2 ·
How do we know the point of 0 electric field is on the axis?
- laser
- · Replies 3 ·
How Does Changing Distance Affect Microwave Path Difference?
- heroslayer99
- · Replies 7 ·
How to find the cube roots of a real number not equal to 1?
- zenterix
- · Replies 9 ·
Position and acceleration in simple harmonic motion given velocity
- zenterix
- · Replies 16 ·
Rigid body dynamics problem
- Goodwill
- · Replies 13 ·
Calculating tension in three cords supporting a 100 kg mass
- TheePhysicsStudent
- · Replies 8 ·
I Thought I Understood Gauss' Law (Sheets)
- flyusx
- · Replies 26 ·
Determining field between oppositely charged conducting plates
- Natha
- · Replies 6 ·
Coefficient of kinetic friction of a block sliding across the ceiling
- latos
- · Replies 7 ·
Relative uncertainty for products: linear vs quadratic propagation
- TRB8985
- · Replies 4 ·
A water-bottle demonstration of atmospheric pressure
- Steve Rogers
- · Replies 6 ·
Moment of inertia of a cuboid parallel to one of its faces (repost with diagram)
- eddiezhang
- · Replies 25 ·
Average velocity for two different types of motion along same path
- brotherbobby
- · Replies 22 ·
Heater power keeping a room constantly warm from low temperatures outside
- Karma1412
- · Replies 9 ·
Power delivered to wheels of car with constant air resistance
- I_Try_Math
- · Replies 3 ·
Angular frequency of two hanging bobs of different masses
- questionas
- · Replies 12 ·
Two concentric conducting spherical shells and resistor in between
- zenterix
- · Replies 44 ·
Linearizing a circuit with a nonlinear element
- zenterix
- · Replies 1 ·
Work done by friction on a hockey puck
- I_Try_Math
- · Replies 4 ·
Work done on crate moving on incline
- I_Try_Math
- · Replies 28 ·
What does a Zener diode do in a circuit with non-ideal voltage source?
- zenterix
- · Replies 3 ·
Half life of multi chain decays
- heroslayer99
- · Replies 2 ·
Find thermal capacity of a Van der Waals gas
- MatinSAR
- · Replies 31 ·
Why Is My Bungee Cord Tension Calculation Incorrect?
- I_Try_Math
- · Replies 15 ·
An optics question concerning pictures taken by camera
- guv
- · Replies 27 ·
'Police Car Catching Up' problem in kinematics
- Ineedhelpwithphysics
- · Replies 16 ·
Solving for φ on an oscillation problem
- indefiniteintegral
- · Replies 17 ·
Two dimensional motion problem (kicking a soccer ball into the goal)
- Ineedhelpwithphysics
- · Replies 3 ·
Potential and Electric Field near a Charged CD Disk
- cherry
- · Replies 2 ·
Finding surface charge density for charged particle hitting plate
- chrisbroward
- · Replies 4 ·
Electric field from three point charges
- ks81
- · Replies 6 ·
Finding the moment of a force about a point
- TheePhysicsStudent
- · Replies 4 ·
Cosmic ray proton: time dilation between Earth and proton frames
- Mawl
- · Replies 12 ·
Minimizing the Energy of Two Conductors Very Far Apart
- zenterix
- · Replies 23 ·
How Do Signs Affect Energy Calculation?
- hdp
- · Replies 18 ·
Elastic collision with a massless box
- hdp
- · Replies 5 ·
Electric field on the axis of a ring-shaped charged conductor
- yashboi123
- · Replies 1 ·
Moment of inertia of a rectangular prism parallel to one face
- eddiezhang
- · Replies 11 ·
Find the transit time of the train
- GLD223
- · Replies 23 ·
Heat absorbed and rejected in an isothermal process
- MatinSAR
- · Replies 2 ·
Why can we model spherical capacitor with two dielectrics as two capacitors in series?
- zenterix
- · Replies 4 ·
Conservation of Energy with springs
- heroslayer99
- · Replies 13 ·
Force on a charge from a nearby charged rod
- cherry
- · Replies 2 ·
Is my textbook wrong about absolute uncertainties?
- heroslayer99
- · Replies 2 ·
Kinematics, curvilinear motion (a couple of questions)
- srnixo
- · Replies 30 ·
Why Is the Electric Potential the Same for Inner and Outer Semi-Circles?
- cherry
- · Replies 7 ·
When Do Sand Particles Slip Off a Vibrating Plate?
- heroslayer99
- · Replies 13 ·
Action integral for a simple pendulum in Bohn's Analytical Mechanics
- RahSuh
- · Replies 4 ·
Mass on a vertical spring equilibrium and motion
- hello478
- · Replies 10 ·
Motion of a Parachuter (Terminal Velocity, Time of Flight, Distance)
- I_Try_Math
- · Replies 10 ·
What is the y-component of the force by the floor on her during the collision?
- ryancerealbox
- · Replies 15 ·
Max distance a truck can travel without box falling off
- I_Try_Math
- · Replies 10 ·