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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Finding the energy of a charged sphere
- Eitan Levy
- · Replies 1 ·
Waves: Calculate the sound intensity from two speakers
- Karl Karlsson
- · Replies 3 ·
Average speed of a probability density wave and wave packets
- schniefen
- · Replies 17 ·
Calculating the Ratio of Apparent Weight on a Ferris Wheel
- SuperSood
- · Replies 11 ·
Newton's 2nd Law: Pile of Books on a Table Being Moved
- Serbiwni
- · Replies 3 ·
To find the equilibrium position of a mass attached to an elastic string
- gnits
- · Replies 17 ·
Special Relativity question using Lorentz Transformation time dilation
- MyoPhilosopher
- · Replies 17 ·
Rotational motion question -- Wire wound around a rolling spool
- anonymous99
- · Replies 14 ·
How to make m1 the subject of the formula
- cykachu12
- · Replies 1 ·
Is Energy Conservation Preserved in a Circuit with Two Inductors?
- Rolls With Slipping
- · Replies 3 ·
How to proceed after finding the elastic limit in a two-part materials question
- Zararuth
- · Replies 3 ·
How does the current divide in parallel inductors?
- jangchen
- · Replies 4 ·
Kinematics without rolling or sliding
- ac7597
- · Replies 1 ·
Conservation of Energy of a Spring with Weight Added
- The Head
- · Replies 7 ·
How Accurate Is the Calculation of Angular Acceleration and Time for a Yo-yo?
- ac7597
- · Replies 10 ·
Acceleration of masses in a pulley system
- jisbon
- · Replies 2 ·
How to Apply Conservation of Angular Momentum to a Pendulum?
- jisbon
- · Replies 12 ·
Speed needed to travel 48 light-years in 23 years by spaceship clock
- Athenian
- · Replies 13 ·
When a short-circuit exists, how to find the current?
- jangchen
- · Replies 4 ·
Free body diagram -- Ball rotating on one arm of a Y shaped pole
- jisbon
- · Replies 6 ·
Does the Radius Affect Centripetal Force?
- mani88
- · Replies 1 ·
Year 12 mechanics depth study project ideas for 2-hour experiment
- mani88
- · Replies 2 ·
How Does Torque Affect Angular Acceleration in a Circular Disk?
- ac7597
- · Replies 8 ·
Why does my calculation give 1/2 the gravitational potential energy loss instead of 1/4?
- lerngen
- · Replies 9 ·
How Can I Improve My Algebra Skills for Solving Equilibrium Problems?
- posto002
- · Replies 8 ·
Developing an Intuition for Statics Problems
- lightlightsup
- · Replies 14 ·
Solving for Missing Values in 1D Collision w/v2 ≠ 0
- LilRubyKinz
- · Replies 9 ·
Final pressure when two hydrogen bottles equalize
- zanyzoya
- · Replies 10 ·
Why is my measured pulley displacement less than predicted?
- breid040
- · Replies 1 ·
What is the Linear Distance and Angular Velocity of a Rotating Potter's Wheel?
- jdmaxwell02
- · Replies 7 ·
Length of a string over a 2 pulley system
- breid040
- · Replies 7 ·
Solving for Maximum Speed of Cube: Kinematics & Upthrust
- jisbon
- · Replies 7 ·
Deriving the expression for average vertical force
- jisbon
- · Replies 18 ·
Flight of a plane without lift on its wings
- DavidOB18
- · Replies 8 ·
How Fast Could a Car Ascend a Straightened Mountain Road?
- nateb27
- · Replies 48 ·
Spherical gas distributed symmetricaly over space
- Moara
- · Replies 3 ·
Work done pushing a refrigerator up an Incline
- rorte721
- · Replies 6 ·
Three quantum mechanics questions (about Uncertainty p. and comp. conjugate)
- schniefen
- · Replies 8 ·
Speed of charged sphere above a charge sheet using energy methods
- wormwoodsilver101
- · Replies 9 ·
Calculating the work done in a PV diagram
- jisbon
- · Replies 5 ·
Calculate the extension of a spring between current-carrying wires
- jisbon
- · Replies 4 ·
Solving Schrodinger's Equation for a Particle in an Infinite Box
- Boltzman Oscillation
- · Replies 1 ·
Static equilibrium of a bar attached to a hinge
- ac7597
- · Replies 3 ·
Why does oxygen absorb 60GHz radio waves instead of emitting?
- Andrew9
- · Replies 1 ·
Travel time of a particle suspended from an elastic string
- gnits
- · Replies 6 ·
How to find the equilibrium point between two masses? (Topic 6.2)
- Balti
- · Replies 3 ·
Determining Radiation Length in Air
- B4cklfip
- · Replies 1 ·
Finding isentropic enthalpy for superheated refrigerant in compressor
- WhiteWolf98
- · Replies 3 ·
How does the Double-Slit Experiment explain the strange behavior of electrons?
- Krushnaraj Pandya
- · Replies 6 ·
Finding the current and voltage for a resistor
- Davidllerenav
- · Replies 16 ·
Calculate the rotational inertia of a solid hexagonal
- Yalanhar
- · Replies 11 ·
Node Voltage: Where to choose ground?
- rugerts
- · Replies 7 ·
What Are the Units for Precession Rate (Ω)?
- lightlightsup
- · Replies 5 ·
Why does exceeding fs-max cause sliding in rolling wheel problems?
- lightlightsup
- · Replies 16 ·
Height and Acceleration of a Satellite in Orbit
- benca
- · Replies 3 ·
Problem on the required force to keep the gate of a dam at equilibrium
- Kaushik
- · Replies 18 ·
The energy of a ball shot upwards
- physicslady123
- · Replies 5 ·
Calculating the initial frequency of a decelerating flywheel
- Stuka_Hunter
- · Replies 14 ·
Find the sum of all these electric currents
- quee
- · Replies 9 ·
Finding the Torque of a shaft that is spun by a lever
- Muhsin
- · Replies 9 ·
What is the Angular Momentum of a Baseball?
- ac7597
- · Replies 19 ·
Kinematics and angular speed of a collision between a rod and puck
- ac7597
- · Replies 3 ·
Why is the wedge force positive?
- PhysicsCanuck
- · Replies 6 ·
Finding deceleration and initial velocity given segment times and final velocity
- MariaComeHere
- · Replies 6 ·
Minimum initial speed to spin a particle around a disk (with gravity)
- zizzle
- · Replies 9 ·
Impulse on and the distance traveled by a cannonball
- benca
- · Replies 2 ·
How Does the Relative Speed of Photons Change in Different Scenarios?
- MeAndMyLucidLife
- · Replies 28 ·
Determine the effective current value in the circuit with C and R
- Leonid92
- · Replies 3 ·
What is the value of e (coefficient of restitution) for the following?
- Kaushik
- · Replies 10 ·
Entropy and the Laws of Thermodynamics
- Physics345
- · Replies 3 ·
Deriving moment of inertia for a thin spherical shell
- jake010
- · Replies 27 ·
Finding acceleration on an inclined plane pulley system
- Jimmyjonny12
- · Replies 3 ·
Electrostatic force equilibrium
- Prabs3257
- · Replies 4 ·
Compressor pumping 70 L air into 6 L tank: 11.7 or 12.7 atm?
- Zifan Wang
- · Replies 4 ·
Is Equating Energies a Better Solution for Finding Extension Under Spring Force?
- Prabs3257
- · Replies 4 ·
Sign Convention for Angular Acceleration in Rotational Motion
- Santilopez10
- · Replies 15 ·
Body heat loss via radiation calculation check
- crystal1001
- · Replies 7 ·
Universal gas constant R= Cp-Cv
- Sabra_a
- · Replies 2 ·
Ideal gas: Temperture at 1 atm
- Baronen
- · Replies 2 ·
Mass fraction and volume of a gas in a cylinder
- Sabra_a
- · Replies 12 ·
Pushing a stalled car out of an intersection
- carodog
- · Replies 1 ·
What is the Angular Velocity of a Thin Plate at Time t?
- roeb
- · Replies 1 ·
Determine the radius of a rising bubble
- Sabra_a
- · Replies 25 ·
Isothermal, isobaric and adiabatic
- Sabra_a
- · Replies 6 ·
How Can a Stationary Top Block Accelerate with the Bottom Block?
- DavidOB18
- · Replies 9 ·
Change in a marine mammal's lung volume when diving to 200 meters
- crystal1001
- · Replies 6 ·
Isothermal process, Calculate the density
- dbag123
- · Replies 4 ·
Finding the flux along the curved part of a surface
- Pablo
- · Replies 11 ·
Normal force between stacked boxes
- jackattack825
- · Replies 7 ·
BC108 transistor load line doesn't intersect characteristic curves
- nfi
- · Replies 3 ·
Projectile motion with linear drag
- ewelinaaa
- · Replies 1 ·
Fission vs. Fusion question (particle physics)
- Diyon335
- · Replies 4 ·
Net force on an inclined plane with friction
- chezholmes
- · Replies 2 ·
To find the velocity of a mass attached to the midpoint of a spring
- gnits
- · Replies 2 ·
Finding moment of inertia using bifiler suspension with a rectangular rod
- dlxgains
- · Replies 2 ·
Angular momentum of a falling ball
- ac7597
- · Replies 9 ·
Why is mesh current i1 - i2 used instead of i2 - i1?
- rugerts
- · Replies 2 ·
Finding electric field inside a spherical shell with Gauss' law
- Eitan Levy
- · Replies 10 ·
What is the formula for calculating torque in a rotating pyramid?
- ac7597
- · Replies 24 ·
To find the increase in the radius of a rotating ring
- Kaushik
- · Replies 21 ·