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

Finding the linear density of charge on a cylinder

  • davidbenari
  • · Replies 4 ·
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4

How do you prove the kinematic equation vf² = vi² + 2aΔd?

  • killaI9BI
  • · Replies 12 ·
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12

Electric Field Between Two Disks

  • k8thegr8
  • · Replies 3 ·
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3

Intensity of light after passing thru polaroid

  • somecelxis
  • · Replies 1 ·
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1

Finding an expression for a projectile's horizontal range

  • imaturtle123
  • · Replies 1 ·
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1

Constructive or destructive interference after a set number of waves?

  • kontorstol
  • · Replies 2 ·
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2

Inelastic Collision Scenario Question

  • IronManTable
  • · Replies 2 ·
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2

Train Collision Problem - Calculating Head Start

  • egrr10
  • · Replies 1 ·
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1

Car motion from position-time graph: reading speed and acceleration

  • annm95
  • · Replies 5 ·
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5

How Does Gauss' Law Apply to Charged Spheres?

  • recomendacion
  • · Replies 1 ·
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1

Analytical Approach to Impedance Matching

  • ChasW.
  • · Replies 2 ·
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2

Nested pendulum with hanging mass oscillating in horizontal SHM

  • Dinheiro
  • · Replies 6 ·
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6

What Are the Dynamics of a Particle in Vertical Circle Motion?

  • rulo1992
  • · Replies 27 ·
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27

Pendulum Period on Earth and Mars

  • toothpaste666
  • · Replies 6 ·
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6
  • Poll Poll

Where do two balls meet when dropped and thrown upward at same speed?

  • sk218
  • · Replies 2 ·
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2

Simple harmonic motion platform

  • Thatonetim194
  • · Replies 2 ·
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2

Finding a buoyant force on an object

  • SevenSeeds5
  • · Replies 10 ·
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10

Physics HW kinematics and sig figs

  • raho14
  • · Replies 4 ·
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4

Is the answer in book wrong? Ones complement conversion

  • orangeincup
  • · Replies 3 ·
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3

Circular Motion involving a gravitron

  • Jimmy87
  • · Replies 6 ·
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6

Calculating Particle Position with Constant Acceleration

  • Rybka
  • · Replies 3 ·
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3

Solving Calories Problem: Lose 6kg in 42 Days

  • Korisnik
  • · Replies 3 ·
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3

Calculate Horse Power of a Boy Eating Ice

  • sylwesh98
  • · Replies 4 ·
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4

Relative velocity and conservation of linear momentum

  • Lord Anoobis
  • · Replies 7 ·
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7

Deriving acceleration r'' from velocity r' using chain rule

  • yugeci
  • · Replies 1 ·
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1

A vector F=Fz, where z is unit vector, expressed in sphereical coord.

  • renegade05
  • · Replies 8 ·
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8

Work and power for a square thermodynamic cycle

  • Effect
  • · Replies 2 ·
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2

3 bulbs at different brightness

  • emmfranklin
  • · Replies 4 ·
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4

Classical Mech - Newtons 2nd. Quad Air Resistance

  • MPKU
  • · Replies 3 ·
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3

How Much Torque is Needed to Lift a 1000 lb Load with a Power Screw?

  • orangeincup
  • · Replies 13 ·
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13

Possibly incorrect professor statement

  • RMZ
  • · Replies 5 ·
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5

Calculate N for Thermo Lab Vacuum at 293K

  • kopinator
  • · Replies 5 ·
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5

What is its average speed during this 37 s interval? Answer in units o

  • yoitsemmy
  • · Replies 2 ·
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2

Create a car to pick up a ballon, travel a distance, and pop it

  • jet55
  • · Replies 11 ·
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11

Dynamic vs kinetic vs static in physics

  • shushi_boi
  • · Replies 3 ·
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3

Finding resultant magnitude and resultant vector

  • EverT23
  • · Replies 8 ·
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8
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5

Absolute Uncertainty of a Negative Power

  • Redfire66
  • · Replies 2 ·
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2
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9

Electric Potential and Second Charge

  • carpelumen
  • · Replies 2 ·
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2

What is the Height of Mercury in an Inclined Torricellian Tube?

  • Rugile
  • · Replies 3 ·
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3

Solving for the Velocity and Height in a Difficult Kinematics Problem

  • cwheats
  • · Replies 1 ·
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1

Will a trebuchet or catapult throw farther?

  • joemost
  • · Replies 1 ·
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1

Density of Earth's atmosphere w.r.t height

  • blintaro
  • · Replies 10 ·
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10

Density and r.m.s of an ideal gas

  • Apothem
  • · Replies 3 ·
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3

Calculating Time Difference of Longitudinal Waves in Steel Pipe

  • Karol
  • · Replies 18 ·
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18

What is the Change in Potential Energy of a Displaced Meter Scale?

  • sylwesh98
  • · Replies 5 ·
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5

Path diffrence to produce destructive intefrence

  • somecelxis
  • · Replies 12 ·
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12

Finding minimum period for a physical pendulum disk by optimizing angular frequency

  • PhysicsKid0123
  • · Replies 6 ·
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6
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3

Length, time and velocity in relativity (special?)

  • weirdobomb
  • · Replies 3 ·
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3

Current through resistor parallel to two different batteries

  • Ellie
  • · Replies 3 ·
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3

How can angular frequency be eliminated in solving a challenging SHM problem?

  • PhysicsKid0123
  • · Replies 7 ·
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7

Magnitude of electric field 32m from a rod

  • Les talons
  • · Replies 2 ·
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2

Relative Velocity Airplane Problem

  • lexie47
  • · Replies 14 ·
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14

Physics Question pertaining to Velocity and Gravity

  • jasonmoon
  • · Replies 1 ·
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1

Dropping Keys to find the floor you're on

  • B3NR4Y
  • · Replies 13 ·
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13

What Value Should Charge C Have to Nullify the Net Force on Charge B?

  • Rectifier
  • · Replies 8 ·
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8

Average Speed between two cities

  • Chiffy
  • · Replies 1 ·
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1

Precession angle for orbit r(φ)=r₀/(1−ε cos(βφ)) and cyclic condition

  • alejandrito29
  • · Replies 1 ·
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1

Maximum Sliding Distance in a Rotating Cone - Solving for r

  • Alettix
  • · Replies 9 ·
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9

What Are the Correct Steps to Determine the Thevenin Equivalent Circuit?

  • orangeincup
  • · Replies 8 ·
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8

Finding two point charges from force and sum

  • Rastamonstah
  • · Replies 7 ·
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7

Why does a pressure drop in a pipe cause a force on the pipe?

  • sevn
  • · Replies 1 ·
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1

Fluid mechanics -- fluid in a container moving down an incline

  • TheTank
  • · Replies 8 ·
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8

Mechanics in cartesian coordinates

  • Ascendant78
  • · Replies 3 ·
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3

Vector product and vector product angles

  • Bassa
  • · Replies 4 ·
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4

Charge distribution in concentric shells

  • Feodalherren
  • · Replies 6 ·
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6

Can I use BTU for work in conservation of energy with imperial units?

  • mattwkeller
  • · Replies 2 ·
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2

Calculating Magnification with lens, an object, and a screen.

  • jmacmartin
  • · Replies 1 ·
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1

Why use the parallelogram rule instead of a right triangle for force components

  • Slartibartfest
  • · Replies 3 ·
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3

Velocity and Acceleration Equational Problem ( making sense)

  • zippeh
  • · Replies 3 ·
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3

Circuits - Node analysis of connected and dependent sources

  • Rectifier
  • · Replies 1 ·
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1

Does the Permeability of Water Prevent Surface Disturbance in Aquariums?

  • Kaustubh sri
  • · Replies 10 ·
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10

Electric field at origin from quarter-circle arc of charge

  • Tapehead2
  • · Replies 19 ·
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19

Classical Mechanics - Moving Object in 3D space

  • TanGeriN
  • · Replies 2 ·
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2

Car coming to a stop kinematics problem

  • B3NR4Y
  • · Replies 6 ·
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6

Solve for mass using a graph of a collision

  • B3NR4Y
  • · Replies 1 ·
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1
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7

Electric field strength from two charges

  • pstir2
  • · Replies 1 ·
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1

At how many rpms will a blade tip break the sound barrier

  • natux
  • · Replies 5 ·
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5

One Dimensional motion of particle in a potential field

  • sabanboy
  • · Replies 3 ·
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3

How to find wavelenght of a 3m spring with 2,5 Hz?

  • kontorstol
  • · Replies 13 ·
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13

Electrostatic forces and distance when considering changes in potentia

  • Hereformore
  • · Replies 1 ·
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1

Equilibrium Statistical Physics, Plischke ex. 1.2

  • percolator
  • · Replies 2 ·
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2

Why is there an upward force on a partially immersed liquid cylinder?

  • happysmiles36
  • · Replies 5 ·
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5

Object floating on water with oil poured in

  • happysmiles36
  • · Replies 13 ·
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13

Direction of oscillation of wave

  • somecelxis
  • · Replies 1 ·
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1

Why doesn't the inside of a conducting cup transfer charge?

  • mattwkeller
  • · Replies 13 ·
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13

Sig Fig: Calculate (.82+.042)(4.4*10^3) - 3800

  • cuj93
  • · Replies 8 ·
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8

How Do You Apply the Mesh-Current Method Correctly in Circuit Analysis?

  • orangeincup
  • · Replies 1 ·
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1

A shell is fired vertically upwards

  • DriggyBoy
  • · Replies 5 ·
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5

Beers Law and Colorimetry Problems

  • Blockmeister
  • · Replies 7 ·
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7

Minimizing F2 in a 2D force resultant problem with three unknowns

  • Ockham
  • · Replies 11 ·
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11

Some funny theoretical tasks, classical physics

  • (N)amber
  • · Replies 3 ·
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3

Equivalent resistance with a short circuit

  • sun18
  • · Replies 2 ·
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2

Why does water offers less friction?

  • Kaustubh sri
  • · Replies 20 ·
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20

Projectile motion submarine missle problem

  • narutoish
  • · Replies 13 ·
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13

How to Convert Units to Solve Collision Force Problems?

  • leandro_fl
  • · Replies 1 ·
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1

Finding velocity and acceleration of a point on a decelerating wheel

  • lukatwo
  • · Replies 3 ·
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3