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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.

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Solving "ydx - \left( {x + y^3 } \right)dy = 0" with an Integrating Factor

Jul 12, 2005 · Replies 10 · Jul 13, 2005

Replies: 10

Views: 2K

Need help with function problem

Jul 13, 2005 · Replies 2 · Jul 13, 2005

Replies: 2

Views: 2K

Help Me Understand Flux - Magnetically and Electrically

Jul 12, 2005 · Replies 6 · Jul 13, 2005

Replies: 6

Views: 2K

Are Equipotential Surfaces Around Parallel Wires Really Circular Cylinders?

Jul 12, 2005 · Replies 5 · Jul 13, 2005

Replies: 5

Views: 4K

What is the Correct Determinant for a Misprinted Matrix?

Jul 12, 2005 · Replies 8 · Jul 13, 2005

Replies: 8

Views: 2K

Aircrafts Staying Level in Upside Down Flight: How Is It Possible?

Jul 13, 2005 · Replies 3 · Jul 13, 2005

Replies: 3

Views: 2K

Average energy of gas of fermions at T = 0

Jul 5, 2005 · Replies 2 · Jul 13, 2005

Replies: 2

Views: 4K

Power in delevering electricity to a factory

Jul 12, 2005 · Replies 2 · Jul 13, 2005

Replies: 2

Views: 2K

Explaining the High Melting Point of Water

Jul 13, 2005 · Replies 4 · Jul 13, 2005

Replies: 4

Views: 3K

What Is the Temperature at the Interface of Lead and Copper Rods in Series?

Jul 5, 2005 · Replies 2 · Jul 13, 2005

Replies: 2

Views: 7K

Stuck on two electric field questions

Jul 12, 2005 · Replies 9 · Jul 13, 2005

Replies: 9

Views: 12K

Determine the time it take for the car and the truck to meet

Jul 12, 2005 · Replies 5 · Jul 13, 2005

Replies: 5

Views: 2K

How do I find the mass of a spherical gas cloud with varying density?

Jul 12, 2005 · Replies 3 · Jul 13, 2005

Replies: 3

Views: 2K

Understanding Transition btwn Steps of Dirac Delta Function

Jul 12, 2005 · Replies 2 · Jul 12, 2005

Replies: 2

Views: 3K

Calculate Flux of Vector Field F through Unit Sphere | Divergence Theorem

Jul 12, 2005 · Replies 12 · Jul 12, 2005

Replies: 12

Views: 3K

A few questions about water pressure, temp, and sound

Jul 5, 2005 · Replies 2 · Jul 12, 2005

Replies: 2

Views: 3K

Differential equations on mathematica

Jul 5, 2005 · Replies 2 · Jul 12, 2005

Replies: 2

Views: 1K

Finding the charge inside and outside a metal shell

Jul 6, 2005 · Replies 8 · Jul 12, 2005

Replies: 8

Views: 10K

Why is the magnitude of the electric field equal in all cases?

Jul 12, 2005 · Replies 7 · Jul 12, 2005

Replies: 7

Views: 15K

Solving Puzzle of Limit of Integral: $\frac{2e^{-i\alpha x}}{1+\alpha^2}$?

Jun 11, 2005 · Replies 4 · Jul 12, 2005

Replies: 4

Views: 2K

Deriving Kinematics Formula: Step-by-Step Guide with Explanation

Jul 12, 2005 · Replies 4 · Jul 12, 2005

Replies: 4

Views: 19K

Electromagnetic waves - antennas

Jul 12, 2005 · Replies 3 · Jul 12, 2005

Replies: 3

Views: 3K

Why Is (A^{T}A)^{-1}A^{T}=A^{-1}(A^{T})^{-1}A^{T}=A^{-1} Incorrect?

Jul 12, 2005 · Replies 4 · Jul 12, 2005

Replies: 4

Views: 2K

Eigenfunctions and eigenvalues

Jul 11, 2005 · Replies 5 · Jul 12, 2005

Replies: 5

Views: 5K

What's Wrong with My Ball Throw Calculations?

Jul 12, 2005 · Replies 4 · Jul 12, 2005

Replies: 4

Views: 2K

Determining an electric field in vector form, got the answer, just checking.

Jul 11, 2005 · Replies 2 · Jul 12, 2005

Replies: 2

Views: 6K

What is the time needed for A to move 50cm downward?

Jul 4, 2005 · Replies 4 · Jul 12, 2005

Replies: 4

Views: 2K

How Do You Simultaneously Diagonalize Two Commuting Hermitian Operators?

Jul 11, 2005 · Replies 7 · Jul 12, 2005

Replies: 7

Views: 15K

Help me somebody explain this to me(Gauss's Law)

Jul 12, 2005 · Replies 3 · Jul 12, 2005

Replies: 3

Views: 3K

Calculate Antireflective Coating Thickness for Blue Light on Glass Lens

Jul 11, 2005 · Replies 2 · Jul 12, 2005

Replies: 2

Views: 4K

Autonomous differential equation

Jul 4, 2005 · Replies 2 · Jul 12, 2005

Replies: 2

Views: 11K

Difference between a short circuit and a parallel circuit?

Jul 9, 2005 · Replies 10 · Jul 12, 2005

Replies: 10

Views: 6K

How Do You Plot the Graph of a Function with Given Derivatives and Asymptotes?

Jul 11, 2005 · Replies 6 · Jul 12, 2005

Replies: 6

Views: 2K

C Understanding Time Dilation: The Observable Property of Space-Time

Jul 11, 2005 · Replies 4 · Jul 12, 2005

Replies: 4

Views: 2K

Equation satisfied by nth roots of unity

Jul 11, 2005 · Replies 3 · Jul 11, 2005

Replies: 3

Views: 2K

Concave & Convex Mirrors: Real/Virtual Images Explained

Jul 11, 2005 · Replies 3 · Jul 11, 2005

Replies: 3

Views: 3K

How do I derive the formula for free fall displacement?

Jul 11, 2005 · Replies 6 · Jul 11, 2005

Replies: 6

Views: 3K

Finding and approximation for Planck's constant ( H )

Jun 26, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 5K

Proving Linear Operators: Commutator Relationships

Jul 4, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 2K

How is potential energy related to orbits of satellites?

Jul 11, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 2K

Solving Tarmac Chemical Corp's Optimizing Problem with a LP Model

Jul 11, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 5K

Magnus force and boundary layer equations

Jul 10, 2005 · Replies 3 · Jul 11, 2005

Replies: 3

Views: 4K

Angular Force, Work, Torque, & Power Explained

Jul 11, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 2K

How Can Physics Help Us Find Extra-Terrestrial Life?

Jul 4, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 2K

HelpA question very difficulty

Jun 27, 2005 · Replies 10 · Jul 11, 2005

Replies: 10

Views: 4K

How Do Rectangles Collide on an Orthogonal Plane with Given Velocities?

Jul 4, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 3K

Velocity of .30 Cal Rifle After Firing a Bullet

Jul 10, 2005 · Replies 7 · Jul 11, 2005

Replies: 7

Views: 4K

Calculating Average Speed of a Tapir

Jul 11, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 3K

How Does Momentum Conservation Determine Velocities in Collisions?

Jul 10, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 8K

How Does Matrix Rank Relate to Vector Independence and Dimensionality?

Jul 4, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 2K

Calc Help: Find a, b & c Using Point of Inflection & Local Max

Jul 11, 2005 · Replies 14 · Jul 11, 2005

Replies: 14

Views: 2K

How does escape velocity vary with an object's mass?

Jul 9, 2005 · Replies 11 · Jul 11, 2005

Replies: 11

Views: 2K

What is the force exerted by an oak tree on a jogging person after collision?

Jul 10, 2005 · Replies 2 · Jul 10, 2005

Replies: 2

Views: 2K

Easy problem still wrong answer

Jul 10, 2005 · Replies 4 · Jul 10, 2005

Replies: 4

Views: 3K

How to Calculate Potential Energy and Power Output of a Falling Mass

Jul 10, 2005 · Replies 4 · Jul 10, 2005

Replies: 4

Views: 2K

How Do You Calculate Stopping Distance Using Conservation of Mechanical Energy?

Jul 10, 2005 · Replies 5 · Jul 10, 2005

Replies: 5

Views: 2K

Are These Properties of Odd Functions True?

Jul 9, 2005 · Replies 3 · Jul 10, 2005

Replies: 3

Views: 5K

Ranking 4 numbered points according to net electric field

Jul 9, 2005 · Replies 6 · Jul 10, 2005

Replies: 6

Views: 6K

Some help on a tough math topic

Jul 7, 2005 · Replies 5 · Jul 10, 2005

Replies: 5

Views: 3K

Solving a Growing Tree Problem with dy/dx=x/10

Jul 10, 2005 · Replies 6 · Jul 10, 2005

Replies: 6

Views: 3K

Help for physics static and kinetic friction

Jul 9, 2005 · Replies 5 · Jul 10, 2005

Replies: 5

Views: 2K

How Do You Calculate the Probability of Both Picking a Red Jelly Bean?

Jul 9, 2005 · Replies 4 · Jul 10, 2005

Replies: 4

Views: 8K

Linear programming equation problem

Jul 3, 2005 · Replies 2 · Jul 10, 2005

Replies: 2

Views: 13K

How to calculate the distance a car skids before coming to a halt?

Jul 9, 2005 · Replies 7 · Jul 10, 2005

Replies: 7

Views: 5K

Can one predict an outcome over (n) spins?

Jun 29, 2005 · Replies 3 · Jul 10, 2005

Replies: 3

Views: 2K

Electric Field Help: Find Magnitude & Direction

Jul 9, 2005 · Replies 3 · Jul 9, 2005

Replies: 3

Views: 2K

How do you do this? Probability

Jul 8, 2005 · Replies 2 · Jul 9, 2005

Replies: 2

Views: 3K

Oscillations of 1.5 kg Block on Spring: Frequency and Stretch

Jul 8, 2005 · Replies 2 · Jul 9, 2005

Replies: 2

Views: 2K

Help! John Needs to Carry a Long Piece of Wood

Jun 30, 2005 · Replies 9 · Jul 8, 2005

Replies: 9

Views: 3K

How Do You Calculate Force on a Car Impacting a Tree at 60km/h?

Jul 7, 2005 · Replies 2 · Jul 8, 2005

Replies: 2

Views: 11K

Maximizing Integral Value: Finding Optimal a and b Values for x-x^2 Function

Jul 8, 2005 · Replies 8 · Jul 8, 2005

Replies: 8

Views: 2K

If we have to use a match to start a reaction, is it endothermic?

Jul 7, 2005 · Replies 5 · Jul 8, 2005

Replies: 5

Views: 3K

Applying gauss' law to planar symmetry, finding E question

Jul 7, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 4K

K, the idealized surface current density

Jul 7, 2005 · Replies 4 · Jul 7, 2005

Replies: 4

Views: 16K

Differential equation - looking for a minor mistake in my solution

Jul 7, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 6K

Proving One-to-One Functions Using Inverse and Implicit Function Theorems

Jul 5, 2005 · Replies 7 · Jul 7, 2005

Replies: 7

Views: 2K

Kinetic energy of a rotating wheel?

Jul 6, 2005 · Replies 4 · Jul 7, 2005

Replies: 4

Views: 23K

Rain's velocity with respect to a moving car

Jul 6, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 20K

Need Help with Calculus Summer Assignment on Cosine Identities?

Jul 7, 2005 · Replies 11 · Jul 7, 2005

Replies: 11

Views: 5K

What Can I Do When I'm Stuck at Work Without Reference Materials?

Jun 30, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 2K

Trig - Help with tan(arccos(x/3))

Jul 7, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 2K

Draw free body diagrams for each sphere

Jul 7, 2005 · Replies 4 · Jul 7, 2005

Replies: 4

Views: 3K

Exploring SL_2(\mathbb{Z}) and Möbius Transformations on the Upper Half Plane

Jul 6, 2005 · Replies 14 · Jul 7, 2005

Replies: 14

Views: 3K

Solving a Tension Angle Physics Problem with Three Equations | Physics Forum

Jul 7, 2005 · Replies 6 · Jul 7, 2005

Replies: 6

Views: 2K

Kater's Pendulum: What is it & Advantages

Jun 30, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 5K

How did you successfully delete a problem?

Jun 30, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 2K

Linear Transformation: Finding the Matrix of T

Jul 5, 2005 · Replies 6 · Jul 7, 2005

Replies: 6

Views: 2K

Is a Basketball Dribble Simple Harmonic Motion?

Jul 7, 2005 · Replies 2 · Jul 7, 2005

Replies: 2

Views: 5K

Can someone check these out please?

Jun 29, 2005 · Replies 2 · Jul 6, 2005

Replies: 2

Views: 2K

Is g integrable if it equals f at all but a finite number of points?

Jul 6, 2005 · Replies 2 · Jul 6, 2005

Replies: 2

Views: 2K

Unraveling the Mystery of Dimensional Analysis

Jul 6, 2005 · Replies 3 · Jul 6, 2005

Replies: 3

Views: 16K

So I was right. :)Solving Three Kinematics Problems with Air Resistance Ignored

Jul 3, 2005 · Replies 6 · Jul 6, 2005

Replies: 6

Views: 6K

How to solve the integral of Ax^2 * exp(-x^2/2a^2)

Jul 5, 2005 · Replies 3 · Jul 6, 2005

Replies: 3

Views: 3K

What is the direction of the third force in my physics homework problem?

Jul 6, 2005 · Replies 13 · Jul 6, 2005

Replies: 13

Views: 6K

Current density and theorem of curl of curl

Jul 6, 2005 · Replies 3 · Jul 6, 2005

Replies: 3

Views: 9K

Height of Milk in a Carton with Two Pierced Holes

Jul 6, 2005 · Replies 3 · Jul 6, 2005

Replies: 3

Views: 2K

Buggies moving at the same velocity

Jun 29, 2005 · Replies 2 · Jul 6, 2005

Replies: 2

Views: 2K

Oscillations, energy conservation

Jul 5, 2005 · Replies 4 · Jul 6, 2005

Replies: 4

Views: 3K

Sliding ladder leaning against wall, and a triangle of maximum area

Jul 5, 2005 · Replies 5 · Jul 6, 2005

Replies: 5

Views: 2K

Sketch the graph of y = x + sin(x)

Jul 5, 2005 · Replies 4 · Jul 6, 2005

Replies: 4

Views: 3K

Intro Physics Homework Help

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