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.
What Are Some Good Websites for Physics Practice Questions?
  • zeuse
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Help with a Physics Capacitor Problem
  • imationrouter03
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Arc Length of Curve r(t) from 0 to 1: Find the Integral
  • SummerPhysStudent
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Solve the Crazy e/m Problem: Change in Capacitance Required for Detection
  • imationrouter03
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8
Can You Solve ax^2-40x+40=0 for Both a and x?
  • dbn
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9
How Far Must a Key Be Depressed to Detect a Change in Capacitance in a Keyboard?
  • imationrouter03
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Find the Apparent Weight: Solving for Volume
  • akatsafa
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Quantum physics & Atomic Physics Question
  • yoshima
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Trigonometry identity proof trouble. (Help much appreciated)
  • KnowledgeIsPower
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Question when doing a simple investigative experiment .
  • terpsgirl
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2
Which Circuits Cannot Be Reduced to a Single Equivalent Resistor?
  • conkermaniac
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Calculating Final Temperature of Isolated System with Ice and Water
  • marcov8
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10
Thermodynamics Help: Ideal Gas Cycle with Reversible Processes
  • khermans
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6
Understanding Buoyant Force: Impact of Density on Objects Immersed in Water
  • akatsafa
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Simple harmonic motion and amplitude of an object
  • wilmerena
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2
Can someone help a newbie, electric forces
  • DSM4Life
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5
Calculating Launch Speed: What You Need to Know
  • wilmerena
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3
How Much Should Guitar String Tension Be Reduced to Lower Frequency by 2%?
  • bpogi
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5
What is the Relationship Between R, v0, θ, and d in Projectile Motion?
  • bullet_ballet
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2
Why do mirrors reverse images left-to-right?
  • relinquished™
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4
Entropy Question: Calculating Entropy Change for a Diamond
  • Jerzey2Atl
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2
Initial Velocity Calc From Potential Energy (2D Projectile Motion)
  • AcEY
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Solve for Angular Displacement with Acceleration: Rolling Motion Help
  • wilmerena
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Can anybody differentiate this to simplest formy=4/3+5cosx
  • lakshmi
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Physics Assesment : Copper wires resistance
  • Turkish
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2
How Do I Solve Problems Involving Work and Kinetic Energy?
  • Physicshelpneeded
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3
Calculating Electric Force between Identical Charged Rods
  • AgPIper
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5
Angular Momentum of a Spinning Coin
  • cpuwildman
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7
Calculating Force on Potassium Ion Due to Electric Field
  • thebigbluedeamon
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2
Electric Potential (w/ a pendulum :P)
  • AgPIper
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2
What is the net magnetic field at a point due to perpendicular currents?
  • thebigbluedeamon
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3
Find Min Value of r for Unfalling Brick
  • e(ho0n3
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11
C program: reading chars then ints
  • Math Is Hard
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6
Chemistry problem dealing with solubility
  • ACLerok
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2
Math Struggles: A College Student's Dilemma
  • decibel
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7
Light question .difficulty finding answer
  • terpsgirl
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3
What Equation Do You Use to Calculate Average Net Force on a Bouncing Superball?
  • Physicshelpneeded
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9
What is the acceleration of a simple pendulum at the lowest point of its swing?
  • Rockdog
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13
Who First Proposed Sun-Like Stars Exist? The Arguments Behind It
  • hellfire
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Acoustics homework problem help
  • quarky
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How Much Additional Force Is Needed to Hold a Water Hose Stationary?
  • djlightsout06
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How Fast Does the Ladder Slide Down the Wall?
  • ladyrae
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Is doctorate the highest level at a university?
  • EngTechno
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What Factors Affect the Measurement of Reaction Rates in a Closed System?
  • mikeyman2010
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Calculate missing mass from given impulse
  • siemieniuk
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Puzzler for newbies to electrostatics
  • maverick280857
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Solute Particle Count in KBr, HCl &Na_2CO_3
  • recon
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What Is the Probability of Selecting Two Cards That Sum to 3 from a Stack of 6?
  • UrbanXrisis
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Can one become an ameteur Mathematician or Physisict still?
  • ygolo
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Another kinematics easy problem
  • Omid
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C program; trouble with doubles
  • Math Is Hard
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How Is Speed Calculated in Elastic Collisions?
  • chickens
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No. of disjunctions during meiosis
  • avaxtasafi
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Find Friction for Cube on Rough Floor
  • e(ho0n3
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Thermal expansion of diameter of pipe filled with water
  • thermalquestion
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Help on optics problems please they are due tonight
  • supermenscher
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Determining Tension in Uniform Steel Cable
  • e(ho0n3
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Perpetual Motion: Can the Student's Idea Work?
  • dajugganaut
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Solving Vector Problems: Displacement and Magnitude Calculations
  • schrodingersequation
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Physics Forums has helped me with my studies
  • daisyi
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Einstein's Mass-Energy Relation Explained
  • lakshmi
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Correcting Typos in REA Solution Books to Mechanics
  • Will
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How Do You Solve These Temperature and Heat Problems?
  • terpsgirl
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Solving Temperature Problem w/ 30g Ice & 60g Water
  • daisyi
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Conservation of momentum of plate drop
  • romy
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Solving Rational Number Equation | Express x as Ratio of Integers
  • sjaguar13
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How does increasing nuclear force affect nucleon potential energy?
  • lakshmi
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What is the Net Force and Reading on Spring Scale F2?
  • Physicshelpneeded
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Help with easy problems that I just can't seem to get right
  • supermenscher
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Help with Electric Field and Flux
  • Theelectricchild
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Kinetic energy and momentum of two objects
  • wilmerena
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How Do You Calculate Rotation Angles and Motion in Physics Problems?
  • winterma
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Totally lost on magnetic flux question
  • supermenscher
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How Should a Constant Force Affect an Acceleration-Time Graph?
  • Physicshelpneeded
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Can AM Radio Waves Pass Through Glass Better Than FM?
  • Kloka
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How Does Throwing an Anchor Overboard Affect a Barge's Buoyancy?
  • Brianjw
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Conservation of a mechanical energy question
  • wilmerena
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Can Modulo Calculations Demonstrate These Number Theory Properties?
  • 1+1=1
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How Slow Must the Car Go to Stay Safe on a Wet, Unbanked Curve?
  • akatsafa
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Question on aristotles theory of motion
  • terpsgirl
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Where Can I Find Practice Midterms for College Physics?
  • StonedPanda
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This Must B Da Most Easiest Phy Prob.
  • scisyhp
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Work and Kinetic Energy and elastic collision
  • siemieniuk
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Explosion Question did I do this correctly?
  • siemieniuk
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Force and acceleration and graphs
  • Physicshelpneeded
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How Do I Draw a Scale Diagram for Two Forces Acting on an Object?
  • Physicshelpneeded
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Unsatisfied with Borland C++: Needing Assistance
  • SeaBorne
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Solving Pressure & Density Variation w/ Height: Sea Level to Atmosphere Edge
  • Zorodius
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Stuck on 1 problem and part of another problem
  • Brianjw
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Why Should the Boat Head in a Specific Direction to Cross the River Quickly?
  • mikeyman2010
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Velocity and Acceleration Question
  • faust9
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Calculating Distance Using Speed and Time: A Kinematics Problem
  • Omid
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Defferentiate this to simplest formy=a+bcosx/b+acosx
  • lakshmi
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Tips & Resources for Aspiring Secondary Math Teachers
  • 1+1=1
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How do you finish tests faster?
  • Mark
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Calculating Kerosene Tank Height from Leak Rate
  • daisyi
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Calculate RPM of 100m Diameter Space Habitat for Simulated Gravity
  • galoshes
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Fish maintaining position in water
  • Zorodius
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Intersecting Planes and Solving Systems of Equations
  • StonedPanda
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Particle Equilibrium: Solving for the Minimum Angle in a Roller System
  • Artifex
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