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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Heat equation and stainless-steel wire
- Physgeek64
- · Replies 9 ·
How Far Does a Rocket Travel in 10 Seconds at 3600mph?
- Bill Raines
- · Replies 7 ·
Why Doesn't My Power Calculation Match Real-World Scenarios?
- Aeronautician
- · Replies 4 ·
Power given to particle by centripetal forces
- Ghost Repeater
- · Replies 5 ·
Coulomb force and charge equilibrium on the xy-plane
- PRASHANT KUMAR
- · Replies 1 ·
Two blocks on a surface and a pulley
- Eitan Levy
- · Replies 5 ·
Calculate the intensity of the Earth's magnetic field
- PRASHANT KUMAR
- · Replies 2 ·
Magnetic field in a closed path
- Faefnir
- · Replies 7 ·
Contour integral and problem of Quantum mechanics (Griffiths)
- BREAD
- · Replies 1 ·
Calculating water pressure in a horizontal pipe
- Pushoam
- · Replies 4 ·
Change in the energy of photon due to recoil of the nucleus
- Pushoam
- · Replies 2 ·
Calculating angle between velocity and position vector
- Pushoam
- · Replies 6 ·
Calculating Power Output of a p-V Engine
- Pushoam
- · Replies 2 ·
Friction and Scale Readings for a Cuboid on a Weighing Scale
- Eitan Levy
- · Replies 5 ·
Change in the potential energy of a star after explosion
- Pushoam
- · Replies 12 ·
What Are the Correct Values for Probability and Momentum in a Quantum Well?
- PRASHANT KUMAR
- · Replies 1 ·
Ratio of K. E. of solid cylinder to shell
- Pushoam
- · Replies 2 ·
Find the coordinates of a charged particle given the E field
- Curtis Cleary
- · Replies 5 ·
Current flowing from point A in a circuit to point B
- FADFAD1
- · Replies 5 ·
Egg drop device 2m–8m, max 5cm tall, under 2000cm²
- phoenix3997
- · Replies 17 ·
Max spring compression and final velocities for two colliding blocks
- Pie1345
- · Replies 5 ·
Why does phase change on reflection give the wrong wave equation?
- Jahnavi
- · Replies 35 ·
Why Ohm's law doesn't apply to AC voltage and current functions
- Jahnavi
- · Replies 11 ·
Change in Momentum of a Hockey Puck
- Wyatt Lowery
- · Replies 3 ·
Magnetic field of solenoid and a coil with multiple turns
- rooks
- · Replies 4 ·
Gradients of Graphs with and without Rates of Change
- Jimmy87
- · Replies 19 ·
How Does Absorbing an Electric Field Affect the Magnetic Field Across a Surface?
- Physgeek64
- · Replies 1 ·
Electric field varying with distance
- Jahnavi
- · Replies 3 ·
Integral Calculation for Yukawa Potential Differential Cross Section
- BREAD
- · Replies 4 ·
What is the Number of Fringes in a YDSE with Given Parameters?
- Abhimessi10
- · Replies 7 ·
Electric field intensity at a distance
- Jahnavi
- · Replies 3 ·
Rock falling through water with variable acceleration
- Spoti112
- · Replies 5 ·
Block-pulley system and rotational dynamics
- Kennedy
- · Replies 5 ·
Finding eigenvector QM 2x2 matrix
- Taylor_1989
- · Replies 6 ·
How Do Non-Magnetic Metals React to Magnetic Fields?
- Jahnavi
- · Replies 5 ·
Which force creates the torque?
- EastWindBreaks
- · Replies 1 ·
AC circuit Multiple choice question
- Jahnavi
- · Replies 3 ·
Is the velocity of this object increasing or decreasing?
- TMalan
- · Replies 4 ·
How to appropriately assign sigma values (uncertainty)
- NicolaiTheDane
- · Replies 9 ·
Static friction needed to keep wedge M stationary with block m2 on incline
- Eitan Levy
- · Replies 12 ·
Derive the expression for the work done by the friction force
- Alexanddros81
- · Replies 17 ·
Efficient 12V Electromagnet Design for Extended Use
- Gersty
- · Replies 4 ·
Height above the Galactic Plane
- artworkmonkey
- · Replies 2 ·
Electric flux from an infinite charged rod through a sphere
- Const@ntine
- · Replies 5 ·
Intro to probability density QM
- Taylor_1989
- · Replies 6 ·
How Far Does the Ball Land from the Pole?
- Eitan Levy
- · Replies 4 ·
Diagram about potential difference over current
- Krashy
- · Replies 9 ·
Cirular Motion - car on a circular ramp
- Fatima Hasan
- · Replies 4 ·
HW question w/ rotational kinetic energy
- Tony the Tutor14
- · Replies 26 ·
Light Signal Travels Between Earth and a Spaceship
- T-Marked
- · Replies 19 ·
Calculating λ in a ripple tank lab
- queenmurr
- · Replies 2 ·
Friction and normal force on an inclined plane
- Fatima Hasan
- · Replies 8 ·
Work done by the force of a man on a crate of 80N
- Kennedy
- · Replies 14 ·
Finding launch distance without energy methods
- Eitan Levy
- · Replies 12 ·
[Optics] Find maximum order number, Fraunhofer diffraction
- Decimal
- · Replies 7 ·
Length contraction and time dilation in relativity
- Kennedy
- · Replies 30 ·
How Deep Will a Barge Sit When Moving from Saltwater to Freshwater?
- eglaud
- · Replies 4 ·
Friction force calculation returning 7 but not matching answer choices
- Fatima Hasan
- · Replies 8 ·
Constructive Interference in Coherent Antenna Arrays
- not_a_physics_major
- · Replies 6 ·
Particle in a box question in classical mechaincs
- Taylor_1989
- · Replies 6 ·
A weird velocity/acceleration question
- inaiki
- · Replies 4 ·
Unstable equilibrium, centre of mass problem
- Kennedy
- · Replies 4 ·
Special theory of relativity, theoretical problem
- Kennedy
- · Replies 4 ·
How Far Could a Football Be Thrown in Reduced Gravity?
- Lori
- · Replies 10 ·
Centripetal motion, the tension at the bottom of a circle
- Kennedy
- · Replies 7 ·
Basic mechanics question -- Two cables supporting a stage light
- Krashy
- · Replies 2 ·
How Far Will the Ball Roll Relative to the Ground in 0.10 Seconds?
- pgardn
- · Replies 12 ·
Projectile motion above ground given only angle and height
- raptor13
- · Replies 3 ·
Statics of structure, distributed load
- Morshed awad
- · Replies 3 ·
Final velocity after collision of three objects
- Lori
- · Replies 1 ·
Kinetic energy lost in collision between 80g and 60g objects at 50 m/s
- Lori
- · Replies 2 ·
Is my logic right for the answer to this inelastic car collision question?
- Lori
- · Replies 3 ·
Piston with crankshaft: what is the temperature of gas entering the cylinder?
- Ashley1nOnly
- · Replies 8 ·
Circular motion, string and ball in a horizontal circle
- Kennedy
- · Replies 9 ·
Static friction rotating an object
- Biker
- · Replies 10 ·
Finding the battery voltages in this circuit
- Eitan Levy
- · Replies 1 ·
Rotating rod of negligible mass attached to two point masses
- Kennedy
- · Replies 19 ·
Acceleration of a speck around a circle
- Lori
- · Replies 6 ·
Free energy per unit volume of an ideal gas
- Pushoam
- · Replies 3 ·
Energy received by a planet from the Sun
- Jahnavi
- · Replies 17 ·
Is the textbook wrong or am I? (circuit with resistors, switches and a battery)
- Eitan Levy
- · Replies 6 ·
Static friction and a rotating object
- Biker
- · Replies 14 ·
Body describes a closed trajecty on a free-to-spin disk
- Gena
- · Replies 2 ·
Catapult Lab Help: Calculating Projectile Motion and Energy | Physics Lab Tips
- alli66
- · Replies 2 ·
Gauss' Law: Sphere with an Opening
- Const@ntine
- · Replies 4 ·
Solving Kinematic Movement Equation: Bike Acceleration
- FelixLudi
- · Replies 5 ·
Current through 15 ohm resistor in series-parallel circuit
- Helly123
- · Replies 14 ·
Kinematics problem with differential equations.
- Spoti112
- · Replies 4 ·
Finding speed of 2.0 kg pendulum at lowest point
- Lori
- · Replies 5 ·
Thermodynamics- Piston problem, pressure, internal energy
- Ashley1nOnly
- · Replies 5 ·
Accurate, precise, both, or neither?
- Lori
- · Replies 6 ·
Block-pulley system and kinetic energy
- Kennedy
- · Replies 1 ·
Find Coefficient of Restitution with just height of the ball after one bounce
- x2017
- · Replies 9 ·
Millikan Oil Drop Experiment: Determining Elementary Charge
- Sandro Romualdez
- · Replies 2 ·
String with masses on either end being pulled from the center
- CSPhysics
- · Replies 5 ·
Connecting two charged capacitors
- Eitan Levy
- · Replies 3 ·
Electrostatics? Magnitude and direction of a magnetic field
- Sandro Romualdez
- · Replies 4 ·
The energy lost in discharging a capacitor
- Pushoam
- · Replies 16 ·
Conduction band, valence band and Fermi energy
- Pushoam
- · Replies 8 ·
How Does a Switch Affect Voltage and Current in a Circuit?
- Eitan Levy
- · Replies 8 ·