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.
How Do I Create a Timer Circuit Using a 555 Timer?
  • XP
  • · Replies 16 ·
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16
Brain cramp on 2nd elevator problem
  • redshift
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4
Solve Mass m: Frequency 0.88 & 0.60 Hz
  • pupatel
  • · Replies 8 ·
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8
Bicycle Type Chain [Mechanics] Problem
  • maverick280857
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2
Refrence Angles & Positive/Negative Angles(Coterminals) HOW?
  • mathzeroh
  • · Replies 2 ·
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2
Calculate Friction Coefficient Using Pulleys and Mass
  • Chaotic Boredom
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2
Sound Travel Time Calculation for Distant Listeners
  • wikidrox
  • · Replies 4 ·
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4
Calc Refractive Index of Cylinder w/Mirrored Surface
  • Dita
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2
How Do Free Electrons Move in Response to Atmospheric Potential Changes?
  • wikidrox
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2
What Happens When a Soviet and US Satellite Collide Elastically?
  • hobo
  • · Replies 4 ·
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4
Ball, spring and curved incline - is this right?
  • redshift
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2
How do I find the limit of x as it approaches zero
  • UrbanXrisis
  • · Replies 12 ·
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12
Distance of Solid Sphere Down Ramp | Physics Problem
  • Format
  • · Replies 2 ·
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2
Understanding Centrifugal Force & Work on a Spool of Thread
  • e(ho0n3
  • · Replies 3 ·
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3
What Is the Angular Acceleration of a Disc Rotating About Multiple Axes?
  • e(ho0n3
  • · Replies 10 ·
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10
Understanding the Physics behind the Epic Racing Scene in 2 Fast 2 Furious
  • KLdude
  • · Replies 14 ·
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14
A Non-Conducting Sphere with a Hole
  • jg370
  • · Replies 2 ·
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2
What was the speed of the bullet just before impact?
  • psruler
  • · Replies 9 ·
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9
Electric Field and Electric Potential
  • orgo
  • · Replies 2 ·
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2
Can Anyone Help with Griffiths' QM Problems for an Exam?
  • mazmaz
  • · Replies 4 ·
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4
Solving 2 Physics Problems: Work and Force Calculations
  • Format
  • · Replies 8 ·
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8
Work on an Incline: Calculating Force and Work
  • Format
  • · Replies 4 ·
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4
What is the equation for equilibrium of a picture suspended by two strings?
  • grahamfw
  • · Replies 3 ·
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3
Represent on a diagram the following to vectors
  • undertow2005
  • · Replies 3 ·
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3
Simple Harmonic Motion Problems with Vertical and Horizontal Springs
  • undertow2005
  • · Replies 21 ·
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21
Solving a Rotational Motion Problem: Determining Angular Velocity & Speed
  • e(ho0n3
  • · Replies 5 ·
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5
Final Exam Help - Grade 11 Physics
  • TigerWoods
  • · Replies 2 ·
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2
Wave propagating along a string - Newton's 3rd Law
  • Jack3000
  • · Replies 3 ·
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3
Calculating Focal Length Using Sign Conventions for Lenses
  • oooride
  • · Replies 2 ·
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2
How to Calculate Moment of Inertia About Each Axis?
  • Luminous Blob
  • · Replies 5 ·
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5
How to Determine the Centroid of a Complex Plane Area in Calculus?
  • agro
  • · Replies 2 ·
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2
Stuck on the Final Module: 3 Questions Answered
  • i_wish_i_was_smart
  • · Replies 2 ·
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2
How do you calculate tension and frictional forces in a system of moving bodies?
  • undertow2005
  • · Replies 7 ·
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7
Calculating Electron Mass from Magnetic Field and Potential Difference
  • invinc1ble
  • · Replies 4 ·
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4
Image formation and ray diagrams
  • fellowsk
  • · Replies 3 ·
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3
Stuck on conservation of energy problem
  • redshift
  • · Replies 5 ·
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5
Wave Optics - Single Slit Diffraction
  • Alice-Shallom
  • · Replies 3 ·
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3
Thermal Expansion of copper sphere Problem
  • acgold
  • · Replies 2 ·
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2
Vertical Asymptotes of x^3/(x^2+3x-10): -5 & 2
  • ladyrae
  • · Replies 3 ·
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3
Why is my mergesort function only working for arrays up to three items?
  • discoverer02
  • · Replies 4 ·
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4
Work-Energy-Power Textbook Problem
  • suffian
  • · Replies 2 ·
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2
Electric Forces and Electric Fields in DNA
  • Dita
  • · Replies 3 ·
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3
Calculate RMS Value of Sawtooth Voltage in Figure 33.54
  • oooride
  • · Replies 3 ·
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3
Mechanics need to get facts straight
  • UrbanXrisis
  • · Replies 5 ·
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5
What Is a Mobility Vector and How Is It Calculated from Vectors v1, v2, and v3?
  • 007
  • · Replies 4 ·
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4
What is the inverse function of x^3 + 1 and how do you find its value at x = 4?
  • UrbanXrisis
  • · Replies 2 ·
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2
Physics: Box sliding down an inclined plane
  • undertow2005
  • · Replies 3 ·
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3
Solve Kinematics Problem: Initial Velocity of Ball Thrown Horizontally
  • PinkFlamingo
  • · Replies 2 ·
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2
Understanding Limits: Solving for x^2-2|x|/x
  • ladyrae
  • · Replies 4 ·
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4
How Do You Solve a Double Integral for Area Between z=e^{x^2} and the xy-Plane?
  • tandoorichicken
  • · Replies 3 ·
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3
How Do You Determine Object Location and Magnification in a Concave Mirror?
  • KingNothing
  • · Replies 5 ·
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5
Weird Generating Function prove
  • phoenixy
  • · Replies 3 ·
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3
Calculating Potential at Point C with Equal Charges on an Equilateral Triangle
  • percy_07
  • · Replies 3 ·
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Finding the Optimal Angle for a Cannon Shot
  • PinkFlamingo
  • · Replies 2 ·
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How Do Hinges Affect Door Movement in Physics Problems?
  • Theelectricchild
  • · Replies 2 ·
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Static coefficient versus kinetic coefficient of friction
  • slayerdeus
  • · Replies 3 ·
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Force/Pressure - Easy Question I think
  • acgold
  • · Replies 2 ·
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Radioactiviy - # of unstable nuclei after 28 hours
  • Carbonoid
  • · Replies 3 ·
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Welding Detached Retinas with Lasers: Solving the Puzzle
  • wikidrox
  • · Replies 3 ·
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Solve Derivative Problem e^{xy} = ln (x+y): Find dy/dx
  • Warr
  • · Replies 2 ·
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Solving the Physics Problem of 20 Tons in a 10 Ton Van
  • Hypercase
  • · Replies 5 ·
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5
Calculating Potential Difference: Work Done and Kinetic Energy Relationship
  • wikidrox
  • · Replies 2 ·
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Solving Scattering Angle Problem When m < M or m > M
  • e(ho0n3
  • · Replies 6 ·
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Proving 1+2+4+...+2^(n-1)=2^(n)-1
  • mustang
  • · Replies 3 ·
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How Does Light Behave When Passing Through Different Materials?
  • dawningit
  • · Replies 6 ·
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How do you add or subtract bar numbers in logarithms?
  • creativeassault
  • · Replies 6 ·
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Electric field and gaussian surface
  • PinkFlamingo
  • · Replies 5 ·
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5
How Do You Calculate the Thrust of a Rocket at Lift-Off?
  • Kodomut
  • · Replies 2 ·
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How to Solve a Trigonometric Equation with Multiple Solutions?
  • Johnny Leong
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Momentum Changes in a variable mass system.
  • Faustian
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What Is the Critical Angle Between Glass and Water?
  • MYS9
  • · Replies 3 ·
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Harmonic motion of a string - Find energy
  • UrbanXrisis
  • · Replies 4 ·
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4
Solving Resonance Problem: Explain Frequency of Tuning Fork
  • WhackyWookie
  • · Replies 3 ·
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3
Does Velocity Remain Constant at Each Hilltop on a Frictionless Track?
  • Texhno
  • · Replies 12 ·
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Cooling with Liquid Nitrogen & Melting Aluminum Cans: Energy Calculations
  • mustang
  • · Replies 3 ·
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3
Discover All Isomers for C9H20 for Beginners
  • peanutthrower
  • · Replies 5 ·
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5
Understanding Conservation of Mechanical Energy in Loop Physics Homework
  • UrbanXrisis
  • · Replies 4 ·
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4
How Does Banking Angle Affect the Radius of an Airplane's Turn?
  • mcgooskie
  • · Replies 3 ·
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Stuck again - electric field and circular arc
  • PinkFlamingo
  • · Replies 3 ·
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3
Electric Potential vrs Electric Potential Energy
  • celect
  • · Replies 3 ·
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3
Calculating Wavelengths & Refraction Angles for Violet Light
  • wikidrox
  • · Replies 3 ·
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3
Why Does the Force Calculation for a Diving Scenario Include Gravity?
  • speg
  • · Replies 3 ·
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3
APU University Student Seeks Support for Analogue Electronics Exam Preparation
  • skinnyl
  • · Replies 14 ·
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14
Average Force and Momentum: What is the Relationship Between Impulse and Force?
  • e(ho0n3
  • · Replies 2 ·
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2
Solving Flotation Problem: Estimate a Polar Bear's Mass
  • WhackyWookie
  • · Replies 3 ·
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3
Solving a Fields Exam Challenge: Calculating E Field & Energy Density
  • Beer-monster
  • · Replies 3 ·
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Annuities: Determining the Interest Rate
  • Itachi
  • · Replies 3 ·
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Stationary Points of Inflection
  • Cummings
  • · Replies 4 ·
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Friction and nonconstant acceleration?
  • Zorodius
  • · Replies 3 ·
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Acceleration Graphs/Tangent Lines
  • Marcules
  • · Replies 3 ·
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Solve the River Current Mystery: Boat Speed & Water Current Calculation
  • PoetryInMotion
  • · Replies 3 ·
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3
Physics Problems: Modules 2-7, 9 - Solving with Calculations and Explanations
  • i_wish_i_was_smart
  • · Replies 7 ·
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7
Finding a Common Household Toy for Physics Presentation
  • lalota
  • · Replies 7 ·
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7
Find Synodic Period of Jupiter | Astronomy Help for Introductory Course
  • cassiopeiae
  • · Replies 4 ·
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4
Geometric Sequence; Arithmetic Sequence w/o 2,3,7
  • mustang
  • · Replies 2 ·
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2
Just these two problems I'll be done.
  • mustang
  • · Replies 2 ·
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Centripetal force on a car turning
  • adamg
  • · Replies 9 ·
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9
Motion in one dimension of a swimmer
  • Alice-Shallom
  • · Replies 2 ·
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Alternating Current Circuits and Electromagnetic Waves
  • ScoutFCM
  • · Replies 2 ·
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2
How Much Steam Is Needed to Heat Water in a Copper Calorimeter to 50°C?
  • Cummings
  • · Replies 2 ·
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2