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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Where to buy iron filings, wire, and magnets
- doradexplorer
- · Replies 2 ·
How Do You Find the Gradient of a Line?
- SleSSi
- · Replies 10 ·
Pendulum problem - there's got to be an easier way
- tony873004
- · Replies 7 ·
How would one label power? Is it in Newtons?
- scienceiscool
- · Replies 3 ·
Artificial satellite velocity (around the earth)
- bullroar_86
- · Replies 2 ·
Prove only using Fourier Series
- Oxymoron
- · Replies 11 ·
Ideal Mechanical Advantage of a Lever with 65N Force and 60/10 cm Arms
- billnyerocks
- · Replies 3 ·
Solving Rydberg's Equation for an Unexcited Hydrogen Atom
- scorpa
- · Replies 2 ·
How Do You Calculate the Amount of Each Ingredient Needed to Make Gunpowder?
- b14him88
- · Replies 3 ·
Direct comparison test for convergence
- RadiationX
- · Replies 3 ·
Difference between frequency and period in oscillating motion
- bjon-07
- · Replies 4 ·
Force on a wire in a magnetic field at different angles
- lightuplightup
- · Replies 2 ·
Period of a satellite in an elliptical orbit compared to circular orbit
- bullroar_86
- · Replies 6 ·
Can a Sound Mill Harness the Power of Sound Waves?
- Amroth
- · Replies 7 ·
How Far Will the Spring Stretch Beyond Equilibrium in Its First Swing?
- Joyce
- · Replies 2 ·
Suppose a small coin is on a flat horizontal rotating turntable
- bullroar_86
- · Replies 15 ·
A QM problem on finding eigenvalues
- skpang82
- · Replies 34 ·
How Do You Calculate Molecule Spacing and Quantity Using the Ideal Gas Law?
- destinee20
- · Replies 2 ·
Kinetic energy when a object is dropped from certain distance
- Nikola Tesla
- · Replies 3 ·
Free charge accelerating away from fixed charge: why is my velocity wrong?
- TrippingSunwise
- · Replies 6 ·
Derivative of Electromagnetic Field tensor
- Theraven1982
- · Replies 6 ·
How to Calculate the Kinetic Energy of a Photon Using the de Broglie Hypothesis
- zcapa14
- · Replies 5 ·
Assume that the earth is perfectly round
- bullroar_86
- · Replies 2 ·
Finding The Identity of Unknowns
- don123
- · Replies 2 ·
A question regarding efficiency of pulleys
- Nikola Tesla
- · Replies 8 ·
Checking concave mirror and double convex lens problems
- indiansfan4life
- · Replies 2 ·
Question regarding matrix multiplication
- Mathman23
- · Replies 4 ·
Pre-Test on Trigonometric Equations and Applications
- Lucretius
- · Replies 13 ·
Unwanted terms in photon momentum field calculation
- Kalimaa23
- · Replies 6 ·
Why is sin(α+β) < sin α + sin β for angles in (0, π/2)?
- Kamataat
- · Replies 2 ·
How Do You Calculate Impulse When a Satellite Changes Direction?
- ][nstigator
- · Replies 2 ·
How Much Steam is Needed to Raise Water Temperature from 20°C to 50°C?
- cogs24
- · Replies 2 ·
Choosing a topic for my semester physics lab project
- USA-PV
- · Replies 2 ·
How High Will Water Shoot from a Broken Vertical Pipe?
- thegreatone
- · Replies 2 ·
How do acids and bases interact in a buffer solution?
- laker_gurl3
- · Replies 2 ·
Solving ODE Problems with e^{2s} + 2e^s +2 = 0
- tandoorichicken
- · Replies 2 ·
Sum of a non-geometric series with exponential terms
- RadiationX
- · Replies 6 ·
Can You Solve These Grade 11 Trigonometry Problems?
- Raza
- · Replies 11 ·
Electric Potential and a capacitor
- Jodi
- · Replies 2 ·
Calculate Acceleration of Car: 1600m in 0.125s
- ProBasket
- · Replies 2 ·
Quick Integration Question w/ e
- Weather Freak
- · Replies 3 ·
Question regarding physical optics - (plane-polarized light)
- Sanosuke Sagara
- · Replies 3 ·
Question regarding physical optics - (thickness)
- Sanosuke Sagara
- · Replies 5 ·
Integration by trig. substitution
- mad
- · Replies 5 ·
2 questions in Electric and magnetic fields in space.
- convict11
- · Replies 2 ·
How Do You Integrate ae^(a^u) with Respect to u?
- Chaz706
- · Replies 2 ·
Finding x-intercepts and antiderivatives from slope and derivative conditions
- scorpa
- · Replies 3 ·
Could the Green Goblin's Grip Overcome Static Friction on the Bridge?
- DKirby
- · Replies 2 ·
What Causes the Pitch Changes in a Spinning Twirler Toy?
- hulkster
- · Replies 6 ·
Ice melting because of a candle burning?
- Nikola Tesla
- · Replies 4 ·
Integrating 1/-(x-2) and 1/(x-2) - What To Do?
- cmab
- · Replies 2 ·
If the tides on earth one meter high how far away is the moon?
- bjon-07
- · Replies 9 ·
How does polarisation of light work and what does dextrorotary and laevorotary mean?
- charlee
- · Replies 2 ·
Calculating Football Volume with Shells Method - Calc Quest
- courtrigrad
- · Replies 4 ·
Differentiate the exponential function
- monkeyass
- · Replies 2 ·
Find the value of a in y=a(2)^x passing through (3,4)
- racheluckhardt
- · Replies 3 ·
How Can 12 People Meet Each Other at Three Tables Over Five Days?
- Xamfy19
- · Replies 2 ·
Not sure how to do this temp and freq problem
- xxiangel
- · Replies 3 ·
Project on the Lorentz Fitzgerald contraction
- physics4ever
- · Replies 2 ·
Siren Wavelength for Car Travelling North at 29.4 m/s
- srhly
- · Replies 2 ·
Lenses: If given object height and focal length, is it possible to calculate
- Byrne
- · Replies 4 ·
Triangle & Rectangle Area Calculator: Find Solutions for x and y with exponents
- mathelord
- · Replies 2 ·
Why does the sound in a glass chnage as your fill it up with water?
- hulkster
- · Replies 12 ·
Potential due to point charges
- crazy student
- · Replies 5 ·
Why Is the Inverse Laplace Transform of This Function 2e^{-t} - e^{-2t}?
- cyberdeathreaper
- · Replies 5 ·
Hollow sphere rolling up incline and two-block spring frequency
- cde42003
- · Replies 14 ·
A typical thermodynamics question
- tony_engin
- · Replies 4 ·
E and B fields of a point charge moving along the x-axis
- meteorologist1
- · Replies 1 ·
Parametric curves, optimization, and 3D force vectors
- Danielll
- · Replies 3 ·
How Do Recursion Formulas Work in Mathematics?
- skrying
- · Replies 6 ·
Do I use the same method for intersecting lines as for a line and plane?
- EvaBugs
- · Replies 9 ·
Building a battery-powered dragster from repurposed materials
- midcourtassassin
- · Replies 2 ·
How Do You Calculate Maximum Angular Acceleration of a Pendulum?
- UrbanXrisis
- · Replies 2 ·
Hand-drawing a line graph to show the y-intercept
- heather002
- · Replies 2 ·
Finding the Original Frequency of a Vibrating Tuning Fork
- Haftred
- · Replies 2 ·
How Do Mechanics and Statics Problems Calculate Movement and Force?
- blackbody
- · Replies 3 ·
What Are the Inner and Outer Radii of y=arccos(x)?
- cmab
- · Replies 2 ·
Can someone explain Gauss's law in simple terms?
- elevated
- · Replies 6 ·
Convert polar and Cartesian equations, aircraft bearing, and vector forces
- Apophis
- · Replies 2 ·
Entropy change of ideal gas in Q/T form
- tony_engin
- · Replies 16 ·
Finding area between circle and y-axis using integration
- roger
- · Replies 13 ·
Rate of liquid height change in draining cylindrical tank
- gillgill
- · Replies 16 ·
How Do You Calculate the Sum of Specific Mathematical Progressions?
- courtrigrad
- · Replies 2 ·
Do sequences with limits always converge?
- RadiationX
- · Replies 4 ·
Proving Measurability and Zero Area for Finite Sets in a Plane
- courtrigrad
- · Replies 2 ·
What is the balance due on a $275,000 mortgage after 8 years?
- IB
- · Replies 3 ·
What is the moment experience by each hinges?
- adiputra
- · Replies 7 ·
Question on electrostatic pressure
- brianparks
- · Replies 2 ·
Do arccoth(x) and arctanh(x) have the same derivatives?
- Benny
- · Replies 2 ·
What is the Half Angle Formula for Trigonometric Identities?
- whkoh
- · Replies 9 ·
A few questions in relation to energy
- lektor
- · Replies 2 ·
Specific heat capacity of the final temp
- DDV805
- · Replies 2 ·
Is 100% Efficiency Possible in Energy Conversion Processes?
- Soaring Crane
- · Replies 2 ·
Solving Inverse Function: sec(2x+180)=2, 0<x<360
- Link
- · Replies 4 ·
Equilibrium of a Uniform Rod with Attached Particle Question
- icvotria
- · Replies 2 ·
Finding M in ∫_{-π/2}^{M} cos x dx = 1.5
- ziddy83
- · Replies 4 ·
Where is the centroid of a parabolic wire located?
- StirlingA
- · Replies 2 ·
Taylor differentition polynomials?
- dagg3r
- · Replies 8 ·
How to Determine Thevenin Equivalent and Max Power Transfer Load Resistance?
- airkapp
- · Replies 2 ·
Question on Divergence in Cylindrical Coords
- Spectre5
- · Replies 13 ·