Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Electric Flux through a Closed Hemisphere Question
  • ehabmozart
  • · Replies 3 ·
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Two projectiles, displacement vs. time
  • anoorani
  • · Replies 3 ·
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3
How Long to Reach Maximum Height in Projectile Motion?
  • RuthlessTB
  • · Replies 3 ·
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3
Finding Force to Pull 150lb Sled on Horizontal Surface
  • science_again
  • · Replies 5 ·
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5
Some help needed in interpreting a problem - Keplerian velocity
  • Sefrez
  • · Replies 9 ·
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9
Does Lens Thickness Affect Its Focal Length?
  • JoeN
  • · Replies 10 ·
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10
Finding an objects surrounding temperature
  • Xek_0003ad64
  • · Replies 1 ·
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White dwarf mass-radius relationship
  • PeteWheatstraw
  • · Replies 2 ·
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2
How to find speed with just height given?
  • Sneakatone
  • · Replies 4 ·
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4
Relationship between Polarizing Angle and Angle of internal reflection
  • OnceKnown
  • · Replies 10 ·
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10
Magnetic Moment- Spin System - Probability
  • VVS
  • · Replies 5 ·
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5
Question about de broglie wavelengths
  • daselocution
  • · Replies 2 ·
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2
Omggg Determining voltage between point a and b given R = 40 ohms
  • riseofphoenix
  • · Replies 4 ·
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4
How Do You Calculate the Energy of Particles Using De Broglie's Equation?
  • Von Neumann
  • · Replies 3 ·
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3
Theory of relativity - proton entering a medium
  • Saitama
  • · Replies 35 ·
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Understanding Work and Energy: A Short Guide
  • idllotsaroms
  • · Replies 4 ·
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4
Thermodynamics, Clausius-Clapeyrons equation
  • Log
  • · Replies 10 ·
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10
How do we find the period without using the amplitude?
  • Shinaolord
  • · Replies 6 ·
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6
What is the Form of the Lennard-Jones Potential Between Two Water Molecules?
  • ProPatto16
  • · Replies 1 ·
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1
Free Body Diagram to find Force
  • REM683
  • · Replies 1 ·
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1
Calculating Braking Force and Stopping Distance for an Automobile
  • Sneakatone
  • · Replies 5 ·
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5
Alternating Current Generator (Magentic Field.)
  • SherlockOhms
  • · Replies 17 ·
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17
How Do You Calculate Work Done by a Variable Force Along a Displacement?
  • Sneakatone
  • · Replies 17 ·
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17
Light problem with a mirror and a lens
  • jgpenn12
  • · Replies 4 ·
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4
How can gravity act as a force on stationary objects
  • jayjay55531
  • · Replies 7 ·
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7
Calculate Moment Across Board w/ 3 Roller Pins & Weight
  • REM683
  • · Replies 3 ·
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3
Current Carrying Rod On Inclined Plane.
  • SherlockOhms
  • · Replies 12 ·
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12
Collision and conservation of energy
  • ShizukaSm
  • · Replies 4 ·
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4
Help with this confusing circuit Using superposition find voltages
  • nchin
  • · Replies 6 ·
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6
Finding Internal Resistance with a Graph: How to Derive r+δr from the Gradient?
  • safat
  • · Replies 7 ·
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7
Basketball force/momentum problem
  • quark001
  • · Replies 8 ·
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8
What causes the sound to become louder in a tuning fork experiment?
  • bhoul
  • · Replies 1 ·
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1
Piston Conundrum: Does it Move?
  • glycerunnin
  • · Replies 3 ·
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3
Math in Maxwell needle method- the formula the moment of inertia
  • Outrageous
  • · Replies 9 ·
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9
Determine X-ray Wavelength & Frequency
  • Von Neumann
  • · Replies 2 ·
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2
Friction on horizontal rough surface (finding tension)
  • coconut62
  • · Replies 11 ·
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11
Calculating Resistance for Cylindrical Shell Resistor
  • CSGuy123
  • · Replies 2 ·
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2
A Falling Rod's Intersection Moving Faster Than Light?
  • LoadedAnvils
  • · Replies 2 ·
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2
Finding the Tension in a Rope (Circular motion)
  • indecisive727
  • · Replies 6 ·
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6
Trying to find the angular speed of a rod.
  • thyrgle
  • · Replies 8 ·
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8
Change in potential energy of elastic strip under deformation
  • eutectic
  • · Replies 10 ·
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10
Leaning sticks on a horizontal surface
  • zeralda21
  • · Replies 9 ·
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9
Find the correct frequency so two waves are in phase
  • Jalo
  • · Replies 3 ·
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3
How to find magnitude of initial displacement?
  • Sneakatone
  • · Replies 4 ·
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4
Probability, Minimal Telephone Lines needed
  • VVS
  • · Replies 3 ·
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3
Is the Straight Line in a Carnot Cycle Graph Isobaric or Isothermal?
  • gema
  • · Replies 1 ·
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1
Electric fields through parallelepiped
  • Fluxthroughme
  • · Replies 1 ·
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1
Semi-infinite non-conducting rod
  • kinof
  • · Replies 3 ·
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3
Classical/Relativistic electron through a potential difference
  • Hakkinen
  • · Replies 5 ·
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5
Can the Brightness of Light Bulb C be Increased by Cutting a Wire?
  • devilaudy
  • · Replies 2 ·
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Solve Schrodinger equation for an eletron in a box. Why discrete?
  • tsuwal
  • · Replies 2 ·
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Kinetic energy of water pouring
  • kox
  • · Replies 3 ·
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3
Using Steam Tables to Solve Part (b) - Find Initial and Final Temps
  • theBEAST
  • · Replies 7 ·
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7
Resolving Components: Solving Homework Statement
  • tooperoo
  • · Replies 15 ·
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15
Energy of photons from Balmer series
  • Fluxthroughme
  • · Replies 4 ·
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4
Damped Harmonic Oscillator/Resonance
  • CAF123
  • · Replies 25 ·
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25
Maximum Charge in an LC circuit.
  • InertialRef
  • · Replies 1 ·
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1
Thermodynamics help please. Compression, heat, cool, decompression
  • InquisitiveOne
  • · Replies 16 ·
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16
A question about conducting sphere using Gauss's Law
  • ehabmozart
  • · Replies 1 ·
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1
Atomic Bonding - calculating number of atoms help
  • smg__90
  • · Replies 1 ·
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1
What is the Work Done on an Object on an Incline with Constant Velocity?
  • Mangoes
  • · Replies 1 ·
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Resistors in series and in parallel
  • Moninder
  • · Replies 1 ·
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Thinnest film that will give constructive interference for red light
  • prettykitty
  • · Replies 3 ·
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3
How to find current in parallel and series?
  • Moninder
  • · Replies 1 ·
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1
Calculating Work Done by a Steady Wind in a Given Direction
  • Sneakatone
  • · Replies 10 ·
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Marterial Science (Chemistry Related) Problem
  • Double A
  • · Replies 4 ·
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4
How Can I Solve for Acceleration in This Friction Problem?
  • sankalpmittal
  • · Replies 18 ·
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Fields through an insulating slab
  • Fluxthroughme
  • · Replies 5 ·
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5
How Do You Analyze Forces in a Non-Slipping Book Stack Scenario?
  • nubshat
  • · Replies 5 ·
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How to Calculate Electrical Power from Water Flow Rate?
  • calbolan
  • · Replies 3 ·
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3
How to find work from mass, friction given?
  • Sneakatone
  • · Replies 12 ·
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12
Tricky question involving masses, a pulley on incline with friction
  • totallyclone
  • · Replies 27 ·
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27
Calculating net work done on an accelerating box.
  • klmgirly
  • · Replies 1 ·
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1
Calculating Bx for Two Coaxial Cylindrical Conductors
  • Gee Wiz
  • · Replies 16 ·
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16
Find work from additional spring compression
  • Sneakatone
  • · Replies 2 ·
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Statics Springs Design Problem
  • jklops686
  • · Replies 8 ·
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8
Deriving the Wein displacement law
  • Fluxthroughme
  • · Replies 1 ·
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1
How Does Earth's Potential Energy Change from Perihelion to Aphelion?
  • Robertoalva
  • · Replies 6 ·
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6
Altitude of Satellite Orbit in 4.4 Hours
  • Robertoalva
  • · Replies 10 ·
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10
Electric field inside non conducting sphere
  • Fluxthroughme
  • · Replies 4 ·
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4
Changes in velocity with Direction change
  • skatergirl
  • · Replies 3 ·
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3
Find the current in the copper wire
  • Maiq
  • · Replies 5 ·
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5
Motion in a Plane-Finding velocity and displacement
  • skatergirl
  • · Replies 13 ·
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13
What is the speed of the m1 piece after the explosion?
  • burton95
  • · Replies 4 ·
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Explain how do we get standard error.
  • Outrageous
  • · Replies 8 ·
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8
Oscillation of a vertical spring
  • CAF123
  • · Replies 60 ·
3
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Calculate angular momentum of a planet only velocities and radii known
  • eb446
  • · Replies 1 ·
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1
A Question About Pulleys and Spring Scales
  • mcnealymt
  • · Replies 10 ·
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10
Can a Cloud Containing 8 Solar Masses Collapse?
  • Meganwright
  • · Replies 1 ·
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SHM (finding the phase constant)
  • MarcL
  • · Replies 1 ·
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1
Photon energy and specific heat capacity
  • Fluxthroughme
  • · Replies 1 ·
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1
Horizontal Force on a Gate Hinge?
  • SQUIDDO
  • · Replies 3 ·
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3
Rotation of a uniform rigid disc about a fixed smooth axis
  • Zatman
  • · Replies 9 ·
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9
How Do You Find Equivalent Capacitance in This Complex Circuit?
  • majormaaz
  • · Replies 10 ·
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10
Conservation of Angular Momentum in Molecular Cloud Collapse
  • Meganwright
  • · Replies 1 ·
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Initial speed of proton between parallel plate=?
  • bored2death97
  • · Replies 1 ·
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1
Glancing Collision and Kinetic Energy
  • njuice8
  • · Replies 1 ·
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Finding the height of a body through conservation of energy
  • MichaelDunlevy
  • · Replies 6 ·
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6
What Determines Sound Properties in a Water-Filled Bottle Xylophone?
  • LP23
  • · Replies 1 ·
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1
Difference Between Capacitor Equations: q=Q(1-e^-t/RC) & q=Qe^-t/RC
  • arthur01
  • · Replies 4 ·
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4