Introductory Physics Homework Help Forum

Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

Threads

Find n where the sum from i=1 to n equals 34

  • ptex
  • · Replies 4 ·
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4

Resistance of parallel resistors

  • athenaroa
  • · Replies 3 ·
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3

How does torque relate to stopping a rotating wheel?

  • ProSk8ter474
  • · Replies 2 ·
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2

What is the period of a standing transverse wave on a flexible string?

  • PhysicsPhun
  • · Replies 7 ·
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7
  • Poll Poll

Why is wavelength equal to tank length in wave tank experiment?

  • deimos
  • · Replies 2 ·
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2

Is {(sinx)^2, (cosx)^2} a Basis of W in Linear Algebra?

  • discoverer02
  • · Replies 3 ·
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3

Heat Effects on an Aluminum Annular Ring

  • Xamfy19
  • · Replies 3 ·
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3

Calculating the Volume of Water Displaced by a Kayak

  • psruler
  • · Replies 3 ·
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3

Input and output voltages of a transformer?

  • derfrok
  • · Replies 3 ·
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3

How do you develop your own study habits for science and math?

  • Ebolamonk3y
  • · Replies 5 ·
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5

Batmobile Physics Problem: Solving for Time on a Straight Street in Gotham City

  • raferalston
  • · Replies 2 ·
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2

Environmental significance of fossil fuel use

  • PhYsics0860165
  • · Replies 2 ·
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2

Solving tan(γa) = −γ/β for γ with varying parameter a

  • Norman
  • · Replies 3 ·
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3

Solving Trig Equations: 2cos^2(x)+cos(x)-1=0 in the Interval x≥0 and x≤2π

  • krusty the clown
  • · Replies 2 ·
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2

What is the final nucleus after a series of radioactive decays?

  • athenaroa
  • · Replies 3 ·
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3

How Does Stretching a Wire Affect Its Resistance?

  • cseet
  • · Replies 2 ·
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2

Internuclear separation between ions in a crystal-

  • Claire84
  • · Replies 5 ·
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5

Why do capacitors in parallel and series discharge at different rates?

  • UrbanXrisis
  • · Replies 2 ·
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2

Light wavelength in liquid and critical angle for total internal reflection

  • eku_girl83
  • · Replies 2 ·
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2
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21

How Do You Calculate Diffraction Angles and Grating Lines?

  • mustang
  • · Replies 2 ·
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2

Angular acceleration of a wheel with multiple dynamics questions

  • ProSk8ter474
  • · Replies 2 ·
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2

Angular Acceleration Calculation: Solving Problems with Missed Physics Notes

  • ProSk8ter474
  • · Replies 3 ·
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3

How to draw a force diagram for a charge moving in a magnetic field

  • UrbanXrisis
  • · Replies 10 ·
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10

Saturn's rings and tidal forces on neutron star probes

  • Dingo Jellybean
  • · Replies 4 ·
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4

B field btwn two current carrying wires

  • sonya
  • · Replies 2 ·
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2

A Plane, A pulley and two boxes

  • Divergent13
  • · Replies 4 ·
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4

2002 ap physics c free response #1 question

  • dlau
  • · Replies 3 ·
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3

Solve Algebra 2 Problem 43: 7^3x/2^7x-1=(43.2)^x+2

  • mustang
  • · Replies 2 ·
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2

Trigonometric equations - strange results

  • repugno
  • · Replies 3 ·
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3

Understanding Critical Values of a Function

  • tandoorichicken
  • · Replies 4 ·
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4

Calculating Tension in a Model Plane's Horizontal Circular Motion

  • st3dent
  • · Replies 4 ·
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4

Problem23: Highest Order for 585 nm Grating w/1483 Lines/cm

  • mustang
  • · Replies 5 ·
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5

How Do You Calculate Tension in Wires Supporting a Loaded Rod?

  • jonny17
  • · Replies 2 ·
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2

How Can Rayleigh's Method Determine Beam Oscillation Frequency?

  • JamesJames
  • · Replies 2 ·
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2

Electricity Generated by Magnet Motion Over Coil

  • UrbanXrisis
  • · Replies 10 ·
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10

Linear accelerator physics problem

  • carnom
  • · Replies 4 ·
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4

Making an electromagnetic motor

  • cor_18
  • · Replies 2 ·
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2

Minimum copper and lead mass to sink floating wood

  • jamdr
  • · Replies 13 ·
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13

How Does a Magnetic Field Influence Particle Motion and Flux Calculations?

  • physadam2
  • · Replies 7 ·
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7

Conservation of Linear Momentum in an Explosion of Particles

  • Clutch306
  • · Replies 2 ·
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2

Calculating Average Value of y=x^2√x3+1 from 0 to 2

  • tandoorichicken
  • · Replies 2 ·
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2

Calculating the Impact: Measuring Dive Heights from the Pool

  • fightinag07
  • · Replies 4 ·
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4

Finding Magnification of a Gem Using a Converging Lens

  • mustang
  • · Replies 2 ·
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2

Converging lens focal length and magnification problems

  • mustang
  • · Replies 2 ·
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2

Proper Punctuation: Parentheses and Question Marks in English Writing

  • aychamo
  • · Replies 2 ·
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2

Understanding Waves: Period, Frequency, and Speed of a Vibrating String

  • midgey
  • · Replies 2 ·
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2

Finding member forces in a three-member truss by moment analysis

  • paul11273
  • · Replies 18 ·
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18

Second-order diffraction angle for 3224 slits/cm grating at 463.2 nm

  • mustang
  • · Replies 6 ·
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6

Bifocal lens power for distant vision with near point at 40 cm

  • hibiscus23
  • · Replies 2 ·
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2
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2

Mass dropped into hole through Earth

  • MaximumTaco
  • · Replies 3 ·
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3

What symbol represents momentum: P or ρ?

  • masamune
  • · Replies 2 ·
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2

Centre of Mass & SHM: Help Understanding & Graphing

  • nic0la
  • · Replies 8 ·
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8

Structure constants of Lie groups

  • turin
  • · Replies 2 ·
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2

Impulse response? I need a bit of help with this if anyone can?

  • lizm
  • · Replies 2 ·
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2

Help with Bohr model and hydrogen energy level problems

  • Spectre32
  • · Replies 2 ·
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2

Projectile fired - find maximum height

  • kurtlau
  • · Replies 2 ·
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2

Cracking the Physics Olympiad Problem: Expressing V in 5 Parameters

  • olympiad
  • · Replies 2 ·
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2

Is the Book's Answer Correct for This Circuit Problem?

  • KingNothing
  • · Replies 6 ·
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6

What is the deceleration on an incline?

  • KingNothing
  • · Replies 8 ·
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8

Minimum ionosphere height for destructive interference with radio waves

  • Xamfy19
  • · Replies 2 ·
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2

Having trouble with differential equations and separation of variables

  • cair0
  • · Replies 4 ·
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4

Geomagnetic field demonstration

  • GTdan
  • · Replies 2 ·
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2

Special Relativity- Muons in a Storage Ring

  • Vickitty
  • · Replies 2 ·
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2

Can You Convert an Integral Into an Infinite Series?

  • maxpowers_00
  • · Replies 2 ·
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2

Series and Parallel Circuit Problem

  • moonlit
  • · Replies 2 ·
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2

Series convergence and binomial series in relativity

  • Elkay
  • · Replies 10 ·
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10

Designing an AM Demodulator Circuit with No ICs

  • Trancid
  • · Replies 9 ·
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9

How Does Quantum Mechanics Describe Particle Velocity?

  • curious george
  • · Replies 4 ·
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4

Mechanical energy of cannon ball

  • physics phan
  • · Replies 6 ·
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6
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2

Struggling with AP Multiple Choice: ky Differential Equation

  • tandoorichicken
  • · Replies 2 ·
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2

Solving a Camera Lens Problem: Height of Image on Film

  • jribbe1
  • · Replies 2 ·
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2

Does Earth's mass increase from solar energy using e=mc2?

  • blackflub
  • · Replies 2 ·
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2
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3

Calculate Amplitude of SHM for Block Connected to Spring and Embedded Bullet

  • PhysicsPhun
  • · Replies 3 ·
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3

How Do You Convert dB to W/m² in Sound Intensity Calculations?

  • new324
  • · Replies 6 ·
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6

Relative Brightness of A-E, C+D

  • Empire
  • · Replies 2 ·
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2

QM scattering - Section 19.5 in Shankar

  • gwiazdka
  • · Replies 1 ·
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1

How Do Molecules Stay Distinct Between the Stratosphere and Troposphere?

  • Soilwork
  • · Replies 7 ·
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7

Finding overall uncertainty in g from freefall measurements

  • keil
  • · Replies 2 ·
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2

Magnetic flux through a wire cross-section using Ampere's law

  • AngelofMusic
  • · Replies 2 ·
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2

Eagle flying between two approaching trains at 80 km/h

  • lucianb
  • · Replies 6 ·
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6

What is the inductance of a solenoid with a soft iron core?

  • pattiecake
  • · Replies 2 ·
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2

Calculating Angular Momentum and Precession of a Toy Gyroscope

  • cuz937100
  • · Replies 5 ·
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5

This is very confusing multiple choice question

  • Evergreen
  • · Replies 8 ·
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8

Calculus - Derivatives and Applications

  • toosm:)ey
  • · Replies 6 ·
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6

Finding concavity with implicit differentiation at a point

  • ACLerok
  • · Replies 4 ·
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4
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2

Induced superficial charge distribution of a sphere

  • ReyChiquito
  • · Replies 2 ·
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2

Centripetal acceleration of tire rim and car rounding a turn

  • wikidrox
  • · Replies 2 ·
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2

Dummy Variables in Taylor Series

  • AngelofMusic
  • · Replies 2 ·
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2

Balancing Two Uniform Beams: Calculating Forces & Angles

  • masamune
  • · Replies 2 ·
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2

Can a Linear Transformation Be Onto If the Codomain's Dimension Is Higher?

  • discoverer02
  • · Replies 5 ·
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5

How Does Moving a Magnet Near a Coil Demonstrate Lenz's Law?

  • UrbanXrisis
  • · Replies 3 ·
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3

Maximum velocity and spring constant for bungee cord with 0.176 kg bear

  • g4wonhyo
  • · Replies 1 ·
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1

Finding a factor relationship and minimum of xe^x - 4e^x

  • mcintyre_ie
  • · Replies 16 ·
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16

Lagrange' s eequations of a suspended set of rods

  • student1938
  • · Replies 26 ·
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26

Experiments regarding C of A.M.

  • ACLerok
  • · Replies 2 ·
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2