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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Rayleigh criterion with circular aperture and car headlights
- cep
- · Replies 1 ·
Potential of charge inside a cylinder
- Beer-monster
- · Replies 10 ·
How Do You Calculate the Moment of Force for a Crate on a Framework?
- joe465
- · Replies 17 ·
What is the Maximum Deflection of a Galvanometer in an Electromagnetic Setup?
- Kyoma
- · Replies 1 ·
Conditions for a density matrix; constructing a density matrix
- Juqon
- · Replies 5 ·
Finding the unknown third leg of a three-part bike trip using vectors
- physicsguy101
- · Replies 1 ·
Tension in a 2.0-kg pendulum bob at 30° from vertical
- knowNothing23
- · Replies 9 ·
Why does the equality require μs tan θ > 1?
- fterh
- · Replies 6 ·
What does a distributed load with arrows pointing up mean?
- TyErd
- · Replies 7 ·
Voltage across resistor and capacitor at 10 Hz
- joe007
- · Replies 7 ·
Calculate E - capacitor question
- blueyellow
- · Replies 1 ·
Calculate Rope Tension with Unequal Forces
- iampaul
- · Replies 3 ·
Why does friction with the ground determine who wins tug of war?
- iampaul
- · Replies 11 ·
What is the Significance of Line of Action of Force?
- logearav
- · Replies 5 ·
Simple Harmonic Motion - Acceleration and Velocity
- Peter G.
- · Replies 6 ·
How can I convert the units of B to match the Kennicutt Schimdt law?
- matteo86bo
- · Replies 2 ·
Moments problem from Cambridge AS physics past paper
- seiei
- · Replies 2 ·
Sphere rolling up a ramp No mass given
- mightymango
- · Replies 4 ·
Solving a Puzzling Problem: Equal and Opposite Forces on a Rod
- conquerer7
- · Replies 5 ·
How to prove an electrostatics concept mathematically
- channel1
- · Replies 3 ·
Preparation books before reading Landau and Lifshitz
- genericusrnme
- · Replies 1 ·
Rotated Reference Frames and Angles/Accelerations
- pgm575
- · Replies 3 ·
Cosmic rays and induced radioactivity
- rob60
- · Replies 1 ·
Solving Parallel Plate Capacitor Pendulum Oscillations
- blueyellow
- · Replies 3 ·
Why Is the Calculated Charge Enclosed Within the Cube Incorrect?
- vrinda mukund
- · Replies 2 ·
How Do You Convert Energy from J/kg to kJ/mol?
- clintyip
- · Replies 11 ·
What is the relationship between diffraction and resolving power?
- Peter G.
- · Replies 1 ·
Relative velocity question from giancoli physics
- hamsterpower7
- · Replies 3 ·
Why don't I need to break Coulomb's law force into components?
- channel1
- · Replies 12 ·
Electric force on a charge from three point charges
- hzee
- · Replies 15 ·
Stationary Waves - Effect of Frequency and Amplitude
- Peter G.
- · Replies 3 ·
What Forces Are Needed to Move a Box Up a Hill with and Without Friction?
- Ciricus
- · Replies 1 ·
How would I graph this in my TI-83?
- hyde2042
- · Replies 3 ·
Oblique Collision Trigonometry problem
- Darth Frodo
- · Replies 10 ·
Problem doing force analysis using simultaneous equations
- liamh05
- · Replies 8 ·
Theoretical electrodynamic cycle 2
- Ambforc
- · Replies 3 ·
Delta-v for Hohmann transfer from hyperbolic trajectory to circular orbit
- lujz
- · Replies 4 ·
Using Kirchoff's junction rule for current from a battery.
- rcmango
- · Replies 4 ·
Initial velocity magnitude in projectile motion
- jahaddow
- · Replies 1 ·
Electric field at origin, zero or nonzero?
- rcmango
- · Replies 2 ·
Electron moving from point A to B. electron potential higher?
- rcmango
- · Replies 8 ·
Image created by concave mirror, sight from a distance.
- rcmango
- · Replies 7 ·
Kirchhoff's Rule: Solving Two Equations
- soupastupid
- · Replies 1 ·
Double-slit experiment, one slit covered with glass
- cep
- · Replies 6 ·
Can pressure difference between isolated air masses crush a floor?
- armolinasf
- · Replies 2 ·
Current through resistor, with heat. What happens to the current?
- rcmango
- · Replies 4 ·
What Is the Voltage Across a Resistor in a Parallel Circuit?
- soupastupid
- · Replies 1 ·
Basic Waves Question, but can't visualize.
- Beeza
- · Replies 5 ·
Amount of charge flowing through a resistor?
- druuuuuuuunnk
- · Replies 7 ·
Finding missing components given speed and direction.
- bling-bling
- · Replies 5 ·
Finding magnitude and direction of displacement.
- bling-bling
- · Replies 14 ·
I can't do space curvilinear motion
- EddieHimself
- · Replies 5 ·
Polygon Of Forces To Demonstrate Equilibrium
- sperrya
- · Replies 3 ·
Calculating Wavelengths in de Broglie's Standing Wave Condition
- powerof1004
- · Replies 7 ·
Electric Circuit - Equivalent Resistance
- leslielau
- · Replies 5 ·
Communications satellites in geosynchronous orbit
- thor0403
- · Replies 2 ·
Point charges, midpoint zero or non zero?
- rcmango
- · Replies 3 ·
Bernoulli's Equation and liquid density
- physkid1
- · Replies 1 ·
Plotting momentum conservation for colliding gliders on an airtrack
- VyRianS
- · Replies 4 ·
Double-slit interference and thin-film coatings problems
- shemer77
- · Replies 4 ·
Calculate the coefficient of friction between crates and a conveyor belt
- sperrya
- · Replies 14 ·
Calculating uncertainty in a experiment
- bobred
- · Replies 3 ·
Block released from compressed spring sliding up a frictionless incline
- flyingpig
- · Replies 1 ·
Special relativity, circular motion
- Adorno
- · Replies 1 ·
How Are Internal Energy, Heat, and Work Related in Ideal Gases?
- Punkyc7
- · Replies 1 ·
What is the magnitude of tension in the string supporting the pulley
- bulbasaur88
- · Replies 2 ·
Is the magnetic force always 0?
- flyingpig
- · Replies 17 ·
How Does Traction Affect the Force on a Patient's Foot in a Pulley System?
- bulbasaur88
- · Replies 7 ·
How to Solve AP Physics B Questions Involving Falling Objects?
- jcoolio12
- · Replies 15 ·
Relating resonance with two different Pipes
- RoxSox2004
- · Replies 1 ·
Finding angle with just static friction coefficient
- phee
- · Replies 1 ·
Why is B(x,t)•l - B(x+dx,t)•l in Maxwell's Eqn 34.16?
- sparkle123
- · Replies 3 ·
Where is the Error in Calculating the Magnetic Field of a Current Loop?
- AriAstronomer
- · Replies 3 ·
Calculate the biggest horizontal distance that can be reached
- jaumzaum
- · Replies 7 ·
Projectile motion questiondon't understand about angles and vectors
- hamsterpower7
- · Replies 1 ·
Specific Heat of Nickel / Latent Heat of Fusion
- paperdoll
- · Replies 9 ·
AM radio signal superimpostion/modulation
- sillyquark
- · Replies 10 ·
Force exerted on bar by pin support
- Hanga
- · Replies 2 ·
Understanding Kepler's Second Law of Motion
- logearav
- · Replies 2 ·
If a string is pulled left by 10N and right by 15N, what is the tension?
- zspdztzx
- · Replies 11 ·
Projectile shot from 105 m cliff at 37° angle
- TriumphDog1
- · Replies 14 ·
Stretching a rubberband mulitple times, increases extension length
- [L]otus
- · Replies 1 ·
Flux through concentric spheres
- roam
- · Replies 3 ·
String wave and small angle approximation?
- genxium
- · Replies 2 ·
Pulley system with friction and massive pulleys
- funoras
- · Replies 8 ·
Water glasses experiment theory.
- SugerQueen
- · Replies 7 ·
Optimal takeoff angle for long jump with 20 metre run-up
- miniradman
- · Replies 7 ·
Non Uniform Circular Motion w/ Calculus and Vectors
- rue7
- · Replies 1 ·
Displacement Current and Copper Wire
- ovoleg
- · Replies 3 ·
Two masses on two inclined planes
- maysenator
- · Replies 21 ·
Maxwell's Rainbow Problem frequency/wavelength
- arl146
- · Replies 1 ·
What is the current in each bulb?
- aznseal12
- · Replies 2 ·
How Does Laser Impact Affect Missile Speed Change?
- Gavandeshaq
- · Replies 19 ·
Finding support forces when planking on a pool ladder rail
- Megaevelie
- · Replies 16 ·
Train travelling uphill at s.7s degree incline, find friction coefficient
- MaggieNF
- · Replies 10 ·
Solve Confusing Freight Transport Problem on Titan
- physikamateur
- · Replies 1 ·
Identify which of the ff. object will be positive or negative charge
- Megaevelie
- · Replies 2 ·
Convex lens with 16cm focal length: object distance for 2× magnification
- vickilcw
- · Replies 2 ·
Potential Difference Between Two Points: 100J of Work Done
- raviem
- · Replies 2 ·
Effective heat andThermometers / Rate heat is lost
- paperdoll
- · Replies 9 ·