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.
Does Light Pass Through a Slit Unaltered When Wavelength Equals Slit Width?
  • Alice-Shallom
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Net Charge of -59uC: #Electrons & Mass Increase
  • supermenscher
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2
with Angular Momentum/Angular Speed
  • needhelp
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3
What Stress Is Needed to Maintain an Aluminum Bar's Length from 15°C to 35°C?
  • pupatel
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2
Complicated Centre of Mass Question
  • siemieniuk
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2
Mechanics 2 - Statics of rigid bodies. Please help.
  • KnowledgeIsPower
  • · Replies 9 ·
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9
Moving Mass on a Moving Incline
  • e(ho0n3
  • · Replies 12 ·
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12
Solving Two Problems: Projectile Motion and Horizontal Velocity
  • akatsafa
  • · Replies 10 ·
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10
Sum of (i^2)/(4^i) where i is from 0 to infinity.
  • Johnny Leong
  • · Replies 13 ·
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13
Solve for Man's Velocity on Ice After Throwing Book at 20 m/s
  • terpsgirl
  • · Replies 2 ·
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2
Solving a Linear Equation with e^(x^2) Integrating Factor
  • Math Is Hard
  • · Replies 10 ·
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10
Rod rotating with moment of inertia at angles? HUH?
  • JamesJames
  • · Replies 8 ·
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8
Magnitude or direction of a vector
  • akatsafa
  • · Replies 3 ·
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3
Threshold Frequency: Find Energy of Photoelectron w/ 0.4eV Work Function
  • jazzchan
  • · Replies 3 ·
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3
How Do You Calculate Acceleration and Angular Speed in Physics Problems?
  • franz32
  • · Replies 5 ·
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5
Chemical effect of electric current
  • lakshmi
  • · Replies 4 ·
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4
How Much Work Is Needed to Move a Sodium Ion Across a Cell Membrane?
  • supermenscher
  • · Replies 8 ·
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8
Problem driving me insane electric forces
  • supermenscher
  • · Replies 7 ·
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7
I know I am doing this problem right but I keep getting the wrong answer
  • supermenscher
  • · Replies 2 ·
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2
What Triggers Current Flow in a Photo-Tube?
  • wikidrox
  • · Replies 2 ·
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2
Kinetic Energy and Angular Momentum of General Rotation System
  • slayerdeus
  • · Replies 2 ·
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2
Convert Text to LaTeX File- Easy Steps!
  • 3.14159265358979
  • · Replies 15 ·
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15
Troubleshooting Differentiation: What Went Wrong with (1 - sin x) / (1 + sin x)?
  • maccaman
  • · Replies 2 ·
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2
Gravitational force and the distance from the earth
  • akatsafa
  • · Replies 15 ·
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15
How Do You Differentiate y = sin(cos x)?
  • maccaman
  • · Replies 5 ·
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5
Electric field vs. Electric potential
  • wave41
  • · Replies 4 ·
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4
Help with 2 Probability Problems, should be simple for most
  • maccaman
  • · Replies 4 ·
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4
Solving a Derivative Problem with f(x) = SQRT(1-3x)
  • ladyrae
  • · Replies 2 ·
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2
Wavelength of Electron questions
  • wikidrox
  • · Replies 2 ·
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2
Calculate Torque on Solid Cylinder: Mass, Radius, I
  • ke2cool
  • · Replies 4 ·
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4
Speed, velocity and accelaration
  • billytonydavies
  • · Replies 2 ·
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2
Calculating Wave Properties: Frequency, Period, Speed, and Wavelength Explained
  • BRITTANI
  • · Replies 4 ·
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4
Why Does the Atwood Machine Problem Calculation Differ from Expected?
  • Shentar
  • · Replies 3 ·
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3
How Does Normal Force Vary Across Different Hilltops on a Frictionless Ramp?
  • Zorodius
  • · Replies 7 ·
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7
Solving Precalculus Problem: 1 - x-3/x-2 = 2x-3/x-2 - Tony Zalles
  • Tony Zalles
  • · Replies 5 ·
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5
What's the Width of Your Eardrum?
  • orgo
  • · Replies 2 ·
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2
[Electrical Eng.] TRIAC & ISM research
  • Alireza
  • · Replies 2 ·
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2
Insertion, Deletion, & Inversion: Step-by-Step Guide
  • Nec
  • · Replies 6 ·
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6
Solving for Spring Constant and Distance in Falling Elevators Problem
  • suffian
  • · Replies 1 ·
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1
C program: storing rounded float to int variable
  • Math Is Hard
  • · Replies 4 ·
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4
Help with this problem due tonight
  • supermenscher
  • · Replies 7 ·
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7
Calculating Friction Force: 800N Weight & 15° Angle
  • tweake
  • · Replies 2 ·
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2
Deceleration Problem: Solving for Time, Distance, and Trajectory
  • cellfinder1
  • · Replies 2 ·
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2
Struggling with Econ? Firm Producing 10 Units, Profit $50
  • cowgiljl
  • · Replies 2 ·
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2
Finding Electrical Field Around a Charge
  • celect
  • · Replies 2 ·
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2
Electric Potential of an insulating washer
  • jg370
  • · Replies 2 ·
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2
Calculating Net Force on Positive Particles Using Coulomb's Law and Vectors
  • supermenscher
  • · Replies 5 ·
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5
How can we use a catapult to study the properties of skipping stones in physics?
  • ponjavic
  • · Replies 7 ·
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7
Capacitors in parallel question
  • Fuego
  • · Replies 3 ·
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3
Problems on Antidifferentiation
  • franz32
  • · Replies 3 ·
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3
How Do You Calculate Elevator Acceleration Using Scale Readings?
  • redshift
  • · Replies 2 ·
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2
Another Electromagnetic wave question
  • wikidrox
  • · Replies 2 ·
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2
How to Solve an Atwood Machine Problem with a Pulley
  • e(ho0n3
  • · Replies 24 ·
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24
Work Done Moving Box on Inclined Plane: 160 Newton
  • 2Pac
  • · Replies 4 ·
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4
Electric Potential: Find at Infinity w/ Two Point Charges
  • wave41
  • · Replies 7 ·
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7
Which Charge Do I Use for Calculating Capacitance?
  • wikidrox
  • · Replies 2 ·
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2
Converging lens and Concave mirror
  • HeyHow!
  • · Replies 6 ·
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6
About aerial dish used in communication
  • Johnny Leong
  • · Replies 2 ·
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2
Solve Angle Between Light Rays After Prism Refraction - Help (with prism)
  • shingetsunohimitsu
  • · Replies 2 ·
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2
The Constant Horizontal Force Needed to Raise the Wheel
  • e(ho0n3
  • · Replies 8 ·
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8
Max Speed for 1500 kg Car on 90 m Curve
  • 3.14159265358979
  • · Replies 3 ·
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3
Are electricity and magnetism more alike or different?
  • DoctorReynaldo
  • · Replies 2 ·
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2
Recursive Integral Simplification
  • Nihilist Comedian
  • · Replies 3 ·
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3
Mechanical Kinetic Energy vs Electrical Potential Energy
  • jg370
  • · Replies 3 ·
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3
Projectile motion and radius of curvature.
  • faust9
  • · Replies 4 ·
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4
Identifying Material Based on Density
  • AKG
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2
What is the reference for our year based on periodic motion?
  • Lindseynh
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2
Questions about the titanic ship
  • decibel
  • · Replies 6 ·
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6
Sound Question: Chimney Flue Resonating at Fundamental Frequency
  • Blade_of_Physics
  • · Replies 5 ·
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5
What Is the Minimum Starting Height for a Roller Coaster to Complete a Loop?
  • e(ho0n3
  • · Replies 12 ·
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12
Applying the Summation Rule to Find a Derivative: Am I on the Right Track?
  • ladyrae
  • · Replies 20 ·
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20
What is the Vertical Force on the Support Closest to the Piano?
  • pupatel
  • · Replies 2 ·
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2
The Force of a Tractor Pulling a Trailer Up an Incline
  • Wade
  • · Replies 5 ·
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5
C programming question (beginner)
  • Math Is Hard
  • · Replies 7 ·
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7
Intensity For Three-Slit Grating
  • DivGradCurl
  • · Replies 7 ·
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7
Is the Derivative Calculation Correct Despite the Notation Error?
  • ladyrae
  • · Replies 2 ·
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2
Spinning Bicyle Wheel, Person, and Platform
  • e(ho0n3
  • · Replies 10 ·
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10
How Do You Calculate Total Power in a Hydroelectric Power Station?
  • Alix
  • · Replies 12 ·
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12
Partition of Integer need advice
  • phoenixy
  • · Replies 2 ·
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2
Interference of Light waves HELP
  • yoshima
  • · Replies 3 ·
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3
Calculating Force from Ball-Bat Impact
  • 3.14159265358979
  • · Replies 5 ·
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5
Discovering the Derivate Definition for f(x) = x/(2x-1)
  • ladyrae
  • · Replies 3 ·
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3
Finding f'(x) for f(x) = x - (a/x)
  • ladyrae
  • · Replies 2 ·
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2
Where Can I Find Websites to Help Secondary Students with Math?
  • modmans2ndcoming
  • · Replies 2 ·
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2
Conduction, convection currents, radiation
  • thingsfallapart
  • · Replies 4 ·
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4
A static charge vs. electrical charge?
  • Amphi
  • · Replies 7 ·
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7
Troubleshooting Simple Equilibrium Problems on Inclined Surfaces - 2.0 kg Block
  • KT
  • · Replies 4 ·
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4
Solving a Spool Problem: Length of Unwound Rope & Distance of CM Movement
  • e(ho0n3
  • · Replies 3 ·
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3
Sound Quality in Stadiums: Physics Explained
  • MYS9
  • · Replies 2 ·
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2
Angle of an emerging ray through two boundaries
  • nation_unknown
  • · Replies 2 ·
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2
Converting 25 Degrees to Radians: A Puzzling Question
  • zillea
  • · Replies 2 ·
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2
Binomial Distribution (Statistics)
  • haribol
  • · Replies 2 ·
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2
Frequency of Vibrations & Waves in Guitar String
  • pupatel
  • · Replies 2 ·
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2
How Is the Electrical Force Calculated on a Charge at the Center of a Hexagon?
  • sandplasma
  • · Replies 2 ·
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2
How High Should a Rifle Barrel Be Aimed to Hit a Target 200m Away?
  • PinkFlamingo
  • · Replies 2 ·
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2
Solve Blood Flow Problem: Density of Plasma & Pressure | h=21 cm
  • acgold
  • · Replies 2 ·
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2
Separable differential equation
  • Luminous Blob
  • · Replies 2 ·
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Drawing Methyls & Ethyls: 3-Ethylheptane & 2-Methyl-3-Ethylhexane
  • peanutthrower
  • · Replies 2 ·
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2
Need help on easy questions from phy 105
  • links0311
  • · Replies 2 ·
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2
Discovering the Volume of a Football (Elliptical): Easy Guide
  • HeyHow!
  • · Replies 2 ·
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2