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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The Strong Nuclear Force: Increasing with Distance?
- Atomos
- · Replies 4 ·
Sweet spot for elastic collision with a rod
- syang9
- · Replies 2 ·
How Does Changing Tension Affect Standing Wave Patterns and Antinode Formation?
- nophun6
- · Replies 3 ·
Is there a Doppler effect when sound source and object move at right angles?
- endeavor
- · Replies 9 ·
Calculating Earth's Absorbed Solar Power Using Stefan's Law
- Alt+F4
- · Replies 4 ·
Why is the vis-viva equation for elliptical orbits E_k+U not E_k+U_eff?
- fargoth
- · Replies 1 ·
Wes's Big Exam Thread - 3 Hours of Physics Fun
- Wes72
- · Replies 9 ·
Just translating the question.
- ekinnike
- · Replies 2 ·
A rather challeging circuit problem
- DaMastaofFisix
- · Replies 3 ·
What Is the Maximum Velocity of an Object in Harmonic Motion?
- chazgurl4life
- · Replies 2 ·
How Do You Calculate Velocity at Equilibrium in Simple Harmonic Motion?
- chazgurl4life
- · Replies 3 ·
Dynamical Magnetism Faradays Law
- moo5003
- · Replies 2 ·
Two Doppler Shifts: 800Hz to 126Hz
- endeavor
- · Replies 3 ·
How Does Damping Force Relate to Velocity in a Pendulum?
- jrm2002
- · Replies 1 ·
Magnetic Field Force: What Affects It?
- gvntr52
- · Replies 1 ·
My first post, my first question
- ekinnike
- · Replies 4 ·
Is there an electric or magnetic field acting on this electron
- gvntr52
- · Replies 1 ·
Solving a Physics Problem on the "Zipper" Ride
- Supernerd2004
- · Replies 8 ·
How to Find Work Done by an Ideal Gas with Given Conditions?
- willydavidjr
- · Replies 2 ·
Why do we feel heavier or lighter at differenthis parts of the lift?
- animerawkz
- · Replies 1 ·
How Does Newton's Shell Theorem Affect Gravitational Force on Earth?
- adp5025
- · Replies 1 ·
Angular momentum and starship enterprise
- syang9
- · Replies 3 ·
Calculating Buoyant Force of Ice to Find Mass - No Hints
- cscott
- · Replies 7 ·
Question regarding pressure equ.
- cscott
- · Replies 1 ·
Circular motion-centripetal acceleration
- allok
- · Replies 2 ·
Does light from a point source spread out?
- Alvin
- · Replies 7 ·
Wave length of a transverse wave
- ness9660
- · Replies 5 ·
How to Fill a 7.2m Pool in 2 Hours
- cscott
- · Replies 6 ·
Thermodynamics problem - filling a bottle from reservoir
- Petrushka
- · Replies 3 ·
Finding RMS velocity of an oxygen molecule from average kinetic energy
- pureouchies4717
- · Replies 3 ·
Solving for capacitance in the equation V=Vo exp(-t/RC)
- dan greig
- · Replies 8 ·
E field transformation for rocket moving at 1.0×10⁶ m/s
- Gott_ist_tot
- · Replies 2 ·
Charging a parallel plate capacitor
- al_201314
- · Replies 5 ·
Superimposed Simple Harmonic Motions: Resultant Time Period Analysis
- the_terminator
- · Replies 4 ·
How to determine forward and reverse bias in diode circuits
- ness9660
- · Replies 7 ·
Solving Mechanics Problem: Ball, String, Fly, Velocity
- grief
- · Replies 1 ·
Understanding Damping Coefficients in Vibrational Systems
- jrm2002
- · Replies 2 ·
Finding frequency equation for a tube using diameter
- myshiee
- · Replies 3 ·
How Does Friction Affect the Final Speed of a Crate?
- smbascug
- · Replies 6 ·
A Lesson on Lorentz Contraction
- Tido611
- · Replies 4 ·
Why does a battery supply twice the energy to charge a capacitor as stored in it?
- dan greig
- · Replies 8 ·
Solving Sound Intensities - Hearing Threshold in W/m^2
- Huskies213
- · Replies 3 ·
Expand the quadratic term for resistance equation
- amcavoy
- · Replies 2 ·
How does a speaker create louder sound?
- nophun6
- · Replies 1 ·
A few questions - I want to make sure I did it right
- nyclio
- · Replies 14 ·
Confirming Convection: Heat Escape Through Unlidded Containers
- gem0688
- · Replies 2 ·
How do automatic doors work with photodiodes and lasers?
- mindagap
- · Replies 1 ·
Thin film thickness from reflected yellow light in ethyl alcohol
- BobbyBobbyBob
- · Replies 1 ·
Calculating Distance from Sound and Light Speeds
- kris24tf
- · Replies 3 ·
Charged Particle in Magnetic Field
- spoonthrower
- · Replies 5 ·
Calculate Density of Oil and Water
- zenmasterwombles
- · Replies 2 ·
Blowing across a coke bottle (sound physics)
- nophun6
- · Replies 4 ·
Solving a Focal Length Puzzle: Find the Image Location and Size
- lilkrazyrae
- · Replies 2 ·
SL Atmospheric Pressure Calculation
- zenmasterwombles
- · Replies 3 ·
How do you find the angle of polarization? What is the formula?
- lilkrazyrae
- · Replies 6 ·
What are the steps for solving Maxwell's laws assignment?
- MrJunkpile
- · Replies 3 ·
20.0-mH inductor potential energy problem
- boomboompoop
- · Replies 3 ·
Terminal velocity in finite time
- cscott
- · Replies 3 ·
AC Theory Question: Transformers
- Ryan231
- · Replies 2 ·
Efficiency Calculations for Mechanical Systems
- kaity
- · Replies 5 ·
What is the Relationship Between Radius and Length of Coiled Tape?
- r4nd0m
- · Replies 7 ·
Conservation (energy and momentum) problem
- N_L_
- · Replies 1 ·
Listing all forces on someone swimming in a pool
- sauri
- · Replies 9 ·
Simple Pendulum lab not so simple
- NIZBIT
- · Replies 9 ·
How Do You Calculate Work Done by an Expanding Gas?
- brilyn
- · Replies 1 ·
Fraction Of The Intensity Incident
- lilkrazyrae
- · Replies 1 ·
When to use L = r × p versus L = Iω for angular momentum?
- grief
- · Replies 4 ·
Exam III Practice Problems (liquids and pressures)
- Alt+F4
- · Replies 97 ·
Time for object to fall 500m from a cliff
- 6ies
- · Replies 2 ·
How fast do X rays travel in a vacuum?
- kevinlikesphysics
- · Replies 1 ·
Calculate the position of the image
- Pseudo Statistic
- · Replies 1 ·
What Is the Carnot Efficiency Formula for Engine Calculations?
- brilyn
- · Replies 1 ·
Normal force reading on scale in decelerating elevator
- oooo
- · Replies 2 ·
What is the acceleration of a body sliding on a frictionless inclined plane?
- willydavidjr
- · Replies 14 ·
Calculating Cumulative Time Changes over 20 Centuries
- Fletcher
- · Replies 2 ·
Why Is My Calculation of Acceleration Marked Wrong?
- oooo
- · Replies 3 ·
How to Calculate the Initial Velocity for Two Balls to Land Simultaneously?
- xarmenx
- · Replies 3 ·
LC circuit and fixed inductance problem
- Punchlinegirl
- · Replies 1 ·
Multirange Ammeter and magnitudes of the resistances
- ovoleg
- · Replies 2 ·
The Hot Resistance Of the filament
- Sullitp
- · Replies 12 ·
How Do Two Cars Accelerating Towards Each Other Meet?
- sekishi
- · Replies 4 ·
Rotational Kinematics of Running
- MetalCut
- · Replies 3 ·
Particle Elastic Collision problem
- M98Ranger
- · Replies 3 ·
Doppler shift with moving car horn and bicyclist
- lavafrog
- · Replies 4 ·
Solving for Rotational Kinetic Energy with Angular Speed and Masses
- M98Ranger
- · Replies 5 ·
What is wronge with this picture?
- Longstreet
- · Replies 5 ·
Current through 20Ω resistor when switch reopens in LR circuit
- Gott_ist_tot
- · Replies 1 ·
LC circuit with two capacitors and inductors in series
- davegillmour
- · Replies 1 ·
How Can You Determine the Elastic Limit of a Spring Without Causing Damage?
- foofoo
- · Replies 1 ·
Calculating Frequency and Wavelength of Sound Waves in Water and Air
- brokentruce
- · Replies 11 ·
Resolving car headlights as separate sources with the Rayleigh criterion
- wayneo
- · Replies 14 ·
Hat current is needed to provide a modest 40 kN force? plug and chug
- mr_coffee
- · Replies 2 ·
What is the angular width of the central maximum?
- wayneo
- · Replies 7 ·
How do I connect circuit elements in parallel using breadboards?
- Benny
- · Replies 2 ·
Minimum velocity for a stable Earth satellite orbit
- mcolem
- · Replies 6 ·
Electric Potential and Kinematics
- Elysium
- · Replies 5 ·
Relativistic conservation laws for inelastic collision
- terry
- · Replies 9 ·
How to Calculate Capacitance in a Parallel Configuration?
- Kenny Lee
- · Replies 4 ·
How Do You Calculate the Distance Between Two Moving Ships Using Vectors?
- turnstile
- · Replies 3 ·
Why Does Intensity Diminish at the Ends in Young's Double Slit Experiment?
- sparsh
- · Replies 1 ·