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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Contracting sphere: angular velocity when radius shrinks to 1/nth
- neelakash
- · Replies 5 ·
Finding the focal length of the lense
- Aladin
- · Replies 3 ·
Known problem appears difficult
- neelakash
- · Replies 7 ·
How does friction affect the results of the ticker tape experiment?
- shinks
- · Replies 2 ·
Calculate Velocity Using Bernoulli's Equation
- grscott_2000
- · Replies 1 ·
Centre of mass is a unique point
- neelakash
- · Replies 4 ·
Gas turbine combustion with methane: finding air-fuel ratio for 1200K
- simonre7
- · Replies 1 ·
Why is image distance f(n+1) for a converging lens with n times magnification?
- 7Kings
- · Replies 8 ·
Calculating Work on Equipotential Surfaces
- threewingedfury
- · Replies 5 ·
Gravitational attraction problem
- uha1
- · Replies 3 ·
Calculating Heat Energy Generated from Work and Power
- husky88
- · Replies 5 ·
Why do sparks occur only on a dry day?
- rootX
- · Replies 1 ·
What is the buoyant force of water on the block?
- future_vet
- · Replies 4 ·
How Do You Calculate Initial Acceleration in a Solar Propulsion Engine?
- koujidaisuki76
- · Replies 3 ·
What Physics Concepts Are Applied in These Real-World Scenarios?
- Blake411
- · Replies 4 ·
Tripling the Distance between Bright Fringes
- jst
- · Replies 18 ·
How Do You Calculate the Period of Oscillation for a Mass Suspended by Springs?
- chouZ
- · Replies 3 ·
Thin-Film Interference Question. Quick One
- cheechnchong
- · Replies 16 ·
How Does Height Affect Static Pressure in a Hydroelectric System?
- grscott_2000
- · Replies 2 ·
Showing a rotating liquid surface is paraboloidal
- chouZ
- · Replies 1 ·
How Do You Prove Matrices Like AA^T and A+A^T Are Symmetric?
- FlyingDonkey
- · Replies 2 ·
Check my simple harmonic motion and wave answers
- future_vet
- · Replies 1 ·
How much TNT equals the energy from 1 gram of U-235?
- Mitchtwitchita
- · Replies 4 ·
Calculating Tension for Steel Wire in Piano
- Machine
- · Replies 2 ·
What will be the final temperature of the system?
- diogenes
- · Replies 3 ·
Why do different spherical wave equations give different intensity behaviors?
- Repetit
- · Replies 7 ·
Solving Forces Acting on a Swinging Gymnast
- danago
- · Replies 3 ·
Ideal Voltmeters of DC Circuits
- bjgawp
- · Replies 2 ·
Harmonic motion of coupled pendula
- bigevil
- · Replies 3 ·
Asynchronous/Synchronous motors comparison?
- BayernBlues
- · Replies 1 ·
The 'natural frequency' of an object. What does this mean?
- Couperin
- · Replies 5 ·
Will an increase of voltage also increase Amps?
- TSN79
- · Replies 1 ·
Trig problems (Interference/diffraction and slits))
- AznBoi
- · Replies 3 ·
Doppler effect: wavelength detected as train approaches at 40 m/s
- TbbZz
- · Replies 7 ·
Calculating Angular Spread of Light in Glass Using Snell's Law
- skinard360
- · Replies 6 ·
Air resistance of a high speed car
- tomrule007
- · Replies 3 ·
Collisions and Momentum: Solving for Initial Velocity
- tomrule007
- · Replies 4 ·
Elasticity: finding weight density
- kthouz
- · Replies 2 ·
Diffraction Question: Calculating m
- cheechnchong
- · Replies 1 ·
Torque/Static Equilibrium/Forces problem
- aliaze1
- · Replies 4 ·
Multiple torques/forces on a disk, finding net torque
- aliaze1
- · Replies 2 ·
Bead and loop-the-loop: normal force?
- Physicist
- · Replies 4 ·
Why does motor efficiency increase with voltage?
- heena1988
- · Replies 1 ·
Lenz's Law: Direction of Induced Current
- wakejosh
- · Replies 3 ·
Position of Normal Force in a Pulled 2D Rectangular Block
- h8torade
- · Replies 5 ·
Moment of Inertia of Washer-like Ring
- InSaNiUm
- · Replies 3 ·
Speed, Kinetic Energy, Force Problem.
- marckc22
- · Replies 3 ·
Charge on object between two charged plates Problem
- Galileo_Galilei
- · Replies 1 ·
What Are Common Power Rates for Household Electrical Appliances?
- raman911
- · Replies 1 ·
Projectile Motion: Force vs. Time and Impulsive Force Analysis
- leykis101
- · Replies 3 ·
Work and Kinetic Energy Problem for Pump
- marckc22
- · Replies 2 ·
Force on Current in a Wire: A,B,C?
- wakejosh
- · Replies 5 ·
Finding the second derivative of a logistic regression model
- goatrance
- · Replies 7 ·
Bernoullis equation and appropriate units
- grscott_2000
- · Replies 1 ·
What is the Kinetic Energy of a Block on a Pulley System?
- marckc22
- · Replies 5 ·
Acceleration Dependent on Velocity
- mickeylutz
- · Replies 1 ·
Understanding Momentum and Impulse: A Baseball Problem
- husky88
- · Replies 2 ·
Converging Lenses and image position
- Burner
- · Replies 5 ·
Finding temperature coefficient with two resistance measurements
- Boozehound
- · Replies 5 ·
Calculating Current and Magnetic Field of Wire: Magnetism Question Solution
- Boulderbison19
- · Replies 4 ·
Electric field intensity/ charge magnitude question
- AladdinSane
- · Replies 3 ·
Solving Momentum Equalization of Electron and Proton
- Decan
- · Replies 7 ·
Does angle of refraction increase when incident angle increases?
- AznBoi
- · Replies 5 ·
Impulsive Force: Tom's Homework Solution
- tomrule007
- · Replies 10 ·
Magnitude of an electric force problem with vectors
- AladdinSane
- · Replies 3 ·
What is the lower energy level for a blue emission in the hydrogen spectrum?
- Mitchtwitchita
- · Replies 5 ·
How Does Gravitational Potential Influence Kinetic Energy in Satellite Launches?
- koujidaisuki76
- · Replies 1 ·
What is the Focal Length of a Convex Lens for Sharp Image Formation?
- wakejosh
- · Replies 2 ·
Angular Momentum Sum: Calculating Work Done
- manojanand
- · Replies 1 ·
Work done on a gas in a cylinder
- Funktimus
- · Replies 5 ·
Forced landing of a plane - Find the minimum length of the barage
- Aqua Marine
- · Replies 6 ·
Average Power in an AC current.
- wakejosh
- · Replies 1 ·
How Much Would Each Half of a Cut Spring Stretch Under the Same Load?
- Aqua Marine
- · Replies 5 ·
Conservation of energy of block and ramp
- tomrule007
- · Replies 12 ·
Orbit when central force is suddenly halved
- neelakash
- · Replies 1 ·
What Does a 9V Battery Indicate in Electrical Terms?
- h20h
- · Replies 3 ·
Photon Energy: Frequency and Height in a Well
- Gyroscope
- · Replies 1 ·
Why is a Potential Divider Required in Sensor Circuits?
- lincsimp
- · Replies 3 ·
What characteristic of light produces interference patterns?
- wakejosh
- · Replies 2 ·
Calculating Current in a Circuit
- wakejosh
- · Replies 2 ·
Circular Motion - Satellites Problem
- Galileo_Galilei
- · Replies 4 ·
Calculating 3.0 Coulombs Per Second in Amps
- wakejosh
- · Replies 1 ·
Newton's Third Law of women standing
- Galileo_Galilei
- · Replies 2 ·
What is the correct calculation for total kinetic energy after the collision?
- Gyroscope
- · Replies 2 ·
Car race riddle (not too hard, not too easy)
- Couperin
- · Replies 3 ·
Time constants, resistance and RC circuits
- t_n_p
- · Replies 2 ·
What is the Speed of an Object in Simple Harmonic Motion?
- FaNgS
- · Replies 12 ·
Intensity of light / measuring wavelength of light
- Mex
- · Replies 2 ·
Why Is Applied Force Plotted on the Vertical Axis in Spring Graphs?
- Kevin_14
- · Replies 3 ·
Projectile motion of a flying plane
- ripper9100
- · Replies 4 ·
Proportion of atmospheric Carbon 14
- poiuy
- · Replies 1 ·
Ball bouncing off parabolic mirror y²=2px always reaches focus
- neelakash
- · Replies 10 ·
Is there an easy way to remember the signs used for the mirror equation?
- AznBoi
- · Replies 1 ·
Solve Acceleration of 2.0 kg Block in Newton's 3rd Law Problem
- pingpong240
- · Replies 11 ·
Electricity and magnitism question
- pharaoh
- · Replies 3 ·
Finding aircraft carrier speed from sonar frequency shift
- euphtone06
- · Replies 2 ·
Speed of the second hand of a smoothly running analog watch?
- akoma714
- · Replies 7 ·
Flare fired upward from moving truck
- lilmixbrunette1
- · Replies 5 ·