Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How Much Weight Can a 20.0 m³ Meteorological Balloon Lift?
- chawki
- · Replies 52 ·
How Much Work is Required to Accelerate a Mass from 2 m/s to 60 m/s?
- Ockonal
- · Replies 3 ·
Max Spring Compression Calculation
- jordanilyily
- · Replies 2 ·
How can the window washer move at constant velocity with unbalanced forces?
- ThomasMagnus
- · Replies 5 ·
How Long to Achieve 1-g Environment in a Rotating Space Cylinder?
- ScottM
- · Replies 3 ·
Photon stopping an object travelling at 10m/s
- Mr.A.Gibson
- · Replies 3 ·
How Is the Moment of Inertia of a Cube Calculated Incorrectly?
- iva
- · Replies 11 ·
Solving Dynamics Questions: Newton's Third Law Explained
- darksoulzero
- · Replies 1 ·
Statics: forces on a beam and reactions
- laekoth
- · Replies 4 ·
Find centripetal acceleration with two masses and radius.
- 2much
- · Replies 3 ·
Lorenz velocity transformation
- ProPatto16
- · Replies 6 ·
Understanding Velocity in Polar Coordinates
- srmeier
- · Replies 1 ·
What Is the Moment of Inertia of a Door Rotating on Its Hinges?
- Jacob87411
- · Replies 7 ·
Calculating the Speed of Dolphins Seen Through a Glass Window
- sona1177
- · Replies 11 ·
Algebra step in Halliday 8e Ch6 Prob 34 N2L solution
- NamaeKana
- · Replies 6 ·
Apply a force so it won't move?
- mistabry
- · Replies 4 ·
Bringing the particles together
- shehan1
- · Replies 4 ·
Convert 4,597.7 lb/in^2 to N/m^2: 805,502.76N/m^2
- JL-Wsixx
- · Replies 2 ·
Particle travelling in magnetic field unit vectors
- bmxicle
- · Replies 2 ·
Momentum principle to calculate speed
- shehan1
- · Replies 6 ·
Magnetic field and torque on a concentric coil in a wire loop
- lcam2
- · Replies 3 ·
Ice poured into water. Final temperature?
- hattori_hanzo
- · Replies 15 ·
Particle Collisions: Proton Kinetic Energy + Carbon-12 Nucleus
- Liquidxlax
- · Replies 4 ·
Electrostatics - metal sphere potential
- xwhyy
- · Replies 4 ·
A mass attached to two horizontal springs, vertical motion
- roman15
- · Replies 26 ·
Calculate emf and internal resistance with two circuits with the same cell
- koalafacey
- · Replies 3 ·
LR Circuit: Solving for Charge Flow?
- cupid.callin
- · Replies 2 ·
Can a 10A Fuse Handle a 150W Radio and 240V Water Heater in Parallel?
- chawki
- · Replies 2 ·
Wheatstone Bridge - Max power delivered
- cupid.callin
- · Replies 1 ·
Calculating the Temperature Change of Water After a Raindrop Strike
- larry21
- · Replies 1 ·
Block on a ramp problem - energy
- Marioqwe
- · Replies 2 ·
What is the Coulomb's Law formula for calculating point charges?
- logearav
- · Replies 2 ·
Questions, answers and multiple answers
- chawki
- · Replies 8 ·
Determining values of resistance, voltage, and current throught a circuit
- doublea500
- · Replies 4 ·
Energy conservation with interfering waves
- SaraF
- · Replies 2 ·
Block sliding 3.2 m in 5.1 s down a 36° incline
- Jake4
- · Replies 2 ·
Work Done Problem: Solve for Total Work by 94.6 N Force
- Jake4
- · Replies 2 ·
Why Does a Wheatstone Bridge Offer Higher Accuracy in Resistance Measurements?
- uchicago2012
- · Replies 1 ·
Two 750W radiators in parallel and series at 230V
- chawki
- · Replies 6 ·
What is the wire's linear charge density?
- smoics
- · Replies 1 ·
Projectile Motion - Finding Ini. Vel. using Range and Angle
- Tearsandrille
- · Replies 3 ·
Single Slit Diffraction light intensity
- JJBladester
- · Replies 1 ·
Determine currents through all resistors
- boo_lufc
- · Replies 20 ·
Finding resistance of a copper conductor using resistivity
- whybeahero
- · Replies 5 ·
How Do You Calculate the Force Between Charges in Electrostatics?
- xwhyy
- · Replies 3 ·
What is the Difference Between Active and Reactive Power in A.C. Circuits?
- zorro
- · Replies 9 ·
Finding total resistance between points A and B with 50 ohm resistors
- chawki
- · Replies 1 ·
Energy and coupling in a five-mass spring system on an inclined track
- jcfor3ver
- · Replies 1 ·
Tension and reaction force on a 1 m rod rotating about one end
- Nash77
- · Replies 1 ·
How Do Gymnasts Balance Forces During an Iron Cross?
- way2whack
- · Replies 1 ·
Calculating Energy of Radiation in Proton-Antiproton Annihilation
- ProPatto16
- · Replies 1 ·
Necessary to remove an electron from the surface.
- omni
- · Replies 6 ·
Tension and Forces on an Inclined Plane
- Heat
- · Replies 5 ·
How fast must a coil be rotating to produce a certain current
- Mastur
- · Replies 5 ·
Block launching off ramp given initial velocity and Friction
- physicN00Bz
- · Replies 1 ·
Why does a pendulum in a car behave unpredictably?
- mHo2
- · Replies 6 ·
Why Does My Calculation for Electron Diffraction Not Match the Expected Result?
- kraphysics
- · Replies 8 ·
What is the coefficient of static friction for a penny on a rotating wheel?
- d.tran103
- · Replies 3 ·
Number of moles of hydrogen gas in the cylinder
- mugen715
- · Replies 2 ·
Cannot find V and I in this circuit
- alacey11
- · Replies 5 ·
Calculating Electric Field at the Midpoint of a Charged Rod
- madah12
- · Replies 2 ·
Why is aluminum foil attracted to a charged balloon just like paper?
- MzCurious
- · Replies 1 ·
Finding acceleration when mass and force are givern
- shawnarae
- · Replies 2 ·
Is My Photoelectric Effect Calculation Correct?
- kraphysics
- · Replies 7 ·
How far a cube sinks below the waterlevel
- justinram22
- · Replies 5 ·
How does a 555 timer circuit work?
- maherelharake
- · Replies 5 ·
Output impedance of a Pass Transistor
- dancergirlie
- · Replies 14 ·
Rounding to Significant Figures: Error +/-58, Observed 227.32
- factfinder
- · Replies 1 ·
Using Acceleration to find Tension
- Peter G.
- · Replies 4 ·
Conservation of Energy - Friction - Inclined Slope
- dandy9
- · Replies 6 ·
Diffraction Grating interference pattern
- JJBladester
- · Replies 4 ·
Equivalent resistance of seven resistors in mixed series-parallel circuit
- Kajayacht
- · Replies 5 ·
Can someone explain how to find stuff with 2 Voltmeters?
- doublea500
- · Replies 7 ·
Double Slit, Central Diffraction Maximum
- jegues
- · Replies 8 ·
Roller Coaster + Centripetal Force
- Earn Success
- · Replies 4 ·
Carnot Heat Pump: Solving |Q_c|/|Q_h|=T_c/T_h
- frankwilson
- · Replies 3 ·
What is the significance of electric potential energy in electrostatics?
- kripkrip420
- · Replies 1 ·
RMS voltage, phase angle, AC circuits
- kevinlikesphysics
- · Replies 1 ·
What is the motional emf of the loop at time t = 0.032 s?
- hime
- · Replies 1 ·
Centroid and centre of pressure
- Pietair
- · Replies 3 ·
Finding coefficient of linear expansion
- imminentfate
- · Replies 5 ·
Time-energy uncertainty relation calculation gives 66eV not 6.6eV
- chris_0101
- · Replies 1 ·
Determining change of momentum of a tennis ball
- marijo
- · Replies 1 ·
Is Mechanical Energy Conserved in Rolling Motion without Slipping?
- zorro
- · Replies 2 ·
Calculating Work and Potential Energy of a Block
- emscare
- · Replies 11 ·
Physics - optics - apparent depth
- preet
- · Replies 4 ·
What is the Kinetic Energy of a 3000lb Car Traveling at 60mph?
- mbm
- · Replies 5 ·
Calculate Work, Power, PE and KE for a 400W Motor
- Googl
- · Replies 6 ·
How Do You Calculate the Coefficient of Kinetic Friction on an Inclined Slide?
- jared69sib
- · Replies 2 ·
Calculating Acceleration and Tension in a Pulley System
- Nash77
- · Replies 2 ·
Dimension Analysis: Solving x=ut- y^{2} * z^{2} / V
- Philip Wong
- · Replies 4 ·
Finding height H using Snell's law and trigonometry
- ObliviousSage
- · Replies 2 ·
How Do You Calculate Terminal Velocity for a Wooden Sphere Falling Through Air?
- booksrmylife
- · Replies 6 ·
Solving Algebra Roadblock: 100m Dash Force & Speed
- jared69sib
- · Replies 8 ·
Does a Tire's Point of Contact Have Zero Tangential Acceleration?
- elyons
- · Replies 4 ·
Where Does the Kinetic Energy Equation KE = mgR(1-cos theta) Originate?
- Nash77
- · Replies 1 ·
Physics final practice problems: energy, collisions, and torque
- Nash77
- · Replies 4 ·
Non Inverting Operational Amplifier
- theuniverse
- · Replies 2 ·
Potential difference in circuit with battery, resistors, switch, capacitor
- awertag
- · Replies 1 ·
What is the Max Speed for a Car on a Level Circular Curve?
- d.tran103
- · Replies 1 ·