Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Photoelectric effect, h/e ratio
- Azndude51
- · Replies 1 ·
When do quantum effects become important for a He-Ne laser?
- WolfOfTheSteps
- · Replies 7 ·
Deriving a Proportionality Statement for Centripetal Force and Frequency
- Murdoc88
- · Replies 9 ·
Magnetic Force to balance out Electric Force
- mbrmbrg
- · Replies 2 ·
Static Friction and Circular Motion problem
- Coastal
- · Replies 6 ·
Adiabatic compression of an ideal gas
- Rasine
- · Replies 5 ·
Momentum and kinetic energy- pendulum component
- JerG90
- · Replies 2 ·
How Close Can You Get to a 720p TV Before Seeing Individual Lines?
- kmj9k
- · Replies 4 ·
Rotational Dynamics of a Handle with a Knob on One End
- judonight
- · Replies 2 ·
How Does an Electrostatic Ink-Jet Printer Manipulate Charged Ink Drops?
- sister007
- · Replies 6 ·
How Is Impulse Calculated in Collision Scenarios?
- matadorqk
- · Replies 4 ·
How Much Force Do Pillars Exert with a Parked Car on a Bridge?
- chamonix
- · Replies 1 ·
Find the speed of the car as it hits the water
- bassplayer142
- · Replies 5 ·
What Are the Physics Behind a Mid-Ice Check in Hockey?
- Jaramia
- · Replies 14 ·
Two different elastic collision formulas giving different answers
- rootX
- · Replies 6 ·
Does Electrical Current Depend on Time?
- totalnewbie
- · Replies 10 ·
Magnetic Fields and Equilibrium
- physicsstudent14
- · Replies 5 ·
Calculating Work Done by an Ideal Gas in an Isothermal Expansion
- Rasine
- · Replies 2 ·
Charge on Conventional Alum Foil
- Ronnin
- · Replies 6 ·
Why will ultrasonic waves not interfere with other sound waves in water?
- lwymarie
- · Replies 1 ·
Angular velocities when rubber wheels contact and block slides in rotating cone
- MathematicalPhysicist
- · Replies 8 ·
Calculating ga on Earth and an Asteroid using F=-kx Formula
- imy786
- · Replies 1 ·
Dog sliding on frictionless pond with wind force
- macgirl06
- · Replies 2 ·
What are the coordinates X:XXX and Y.YYY for geocache GC11CEK?
- nls123
- · Replies 1 ·
Circuit analogue to Kinetic motion.
- HalfThere
- · Replies 6 ·
How Does Lifting Objects Affect the Body's Center of Gravity?
- kaya-king cola
- · Replies 8 ·
Solve for Wavelength of Commercial FM Radio Station at 90.1 MHz
- map7s
- · Replies 9 ·
Acceleration Part 3: Is Constant Ga Assumption Valid?
- imy786
- · Replies 1 ·
How to Solve for the Angle of Incline in a Sliding Block Problem
- NaZer
- · Replies 5 ·
Finding acceleration from 2 m fall taking 8.0 s
- imy786
- · Replies 4 ·
Can a stationary, massive particle have a de Broglie wavelength?
- swain1
- · Replies 2 ·
At what rate is the flywheel spinning when the power comes back on?
- nguyenn2
- · Replies 2 ·
Glasses to fix near points and far points
- vu10758
- · Replies 4 ·
Find the acceleration of block of mass
- f(x)
- · Replies 19 ·
Calculating Velocity and Acceleration of Ball from Child A
- physicsone
- · Replies 1 ·
Sign and direction on charges, coulumbs law
- FlopDaNut
- · Replies 3 ·
Pressure as a function of depth
- elitespart
- · Replies 5 ·
Surface Charge Density and high-speed proton beam
- sister007
- · Replies 4 ·
Work Done by Tension in Cable: More Than Gravity?
- rootX
- · Replies 1 ·
Where to buy cork stoppers?-Need for Physics Project
- AznBoi
- · Replies 1 ·
Circular Motion Problem: Spiderman's Swing Analysis
- lapo3399
- · Replies 5 ·
Surface integral problem with attached image
- ajguerras
- · Replies 3 ·
What Is the Direction of the Ball's Projection?
- grando69
- · Replies 2 ·
Speed of sound through an aluminum rod
- fruitl00p
- · Replies 9 ·
Find equation and area of a parametrized surface
- ajguerras
- · Replies 1 ·
Distance traveled by rocket accelerating from 12 to 40 m/s in 5 seconds
- ImsoFly
- · Replies 6 ·
Kinetic Theory of Gases and speed of oxygen molecules
- cyberdx16
- · Replies 1 ·
What Factors Affect the Average Induced EMF in a Rotating Coil?
- kbyws37
- · Replies 1 ·
What is the magnitude of the induced current in the coil
- kbyws37
- · Replies 1 ·
Estimating Power of Water Waves: What Does it Mean?
- rhule009
- · Replies 1 ·
Thermodynamics Otto Cycle engine
- Gordon Arnaut
- · Replies 7 ·
Is r the distance between centers or surfaces in the centripetal force equation?
- BassMaster
- · Replies 10 ·
Finding deceleration from speed change over time
- ImsoFly
- · Replies 10 ·
Thermodynamics Insulation Problem.
- tsMore
- · Replies 1 ·
What is the Ratio of Angles and Distance Between Two Charged Spheres?
- jackiefrost
- · Replies 4 ·
Newton's Law of Gravitation vs. Gravitational Potential Energy
- AznBoi
- · Replies 2 ·
How far do colliding football players slide with friction coefficient 0.052?
- Faded Maximus
- · Replies 3 ·
Speeds of particles of a wave on a cord
- endeavor
- · Replies 3 ·
Solving Dynamics Problem: Normal Force at Bottom of Hill?
- judonight
- · Replies 4 ·
How Does the Doppler Effect Influence Sound Frequency at the Great Wall?
- rmorelan
- · Replies 5 ·
Lissajou's Figure: Name for Distorted Eight?
- Amith2006
- · Replies 1 ·
Calculating Angular Acceleration with Friction on an Inclined Plane
- ripper9100
- · Replies 7 ·
Fractional energy in a damped harmonic oscillator
- endeavor
- · Replies 2 ·
Work done by the spring on an object
- DrHughes
- · Replies 3 ·
Magnetic fields from power lines
- edosqclbe695
- · Replies 1 ·
Calculating Entropy Changes for a Solid Warming from 20C to 100C
- HalfManHalfAmazing
- · Replies 6 ·
Understanding Electric Fields and Capacitance for Suspended Charged Disk
- brad sue
- · Replies 2 ·
How Can You Measure Light Intensity Variation with Wavelength Using an LDR?
- question2007
- · Replies 3 ·
Current Balance experiment (Earth's magnetic field?)
- maverick280857
- · Replies 1 ·
How Do You Calculate Car Motion Parameters in Physics?
- bobchiba
- · Replies 1 ·
Force needed to balance a slightly angled seesaw with equal weights
- bunion
- · Replies 1 ·
Fundamental frequency of organ pipe filled with helium
- GreenMind
- · Replies 2 ·
Average acceleration and velocity problem
- newton9point8
- · Replies 5 ·
Phase difference for sound waves at different distances from sources
- ml_lulu
- · Replies 2 ·
Energy of an oscillating system
- AznBoi
- · Replies 9 ·
Pulleys: How do they exactly work?
- DrHughes
- · Replies 2 ·
How Do You Calculate Internal Resistance and Current Flow in a Circuit?
- debwaldy
- · Replies 6 ·
How Do You Calculate Maximum Angular Velocity and Torques for a Swing Bridge?
- elgringo
- · Replies 4 ·
How does the shape of a lens affect focal lengths?
- jst81161
- · Replies 1 ·
Satellite completing two orbits per day above the equator
- AngularVelocity
- · Replies 1 ·
Capacitance Dielectric Problem
- debwaldy
- · Replies 8 ·
How to Calculate Tension in a Pulley System with Inclined Forces
- Murdoc88
- · Replies 11 ·
Calculating Temperature Change in Materials with Specific Heat and Conductivity
- brad sue
- · Replies 5 ·
Why Do My Momentum Problem Solutions Differ from the Textbook Answers?
- neelakash
- · Replies 1 ·
Car with gun recoil after firing 2 shells at 200 m/s
- neelakash
- · Replies 1 ·
The Dynamics of a Heavy Chain on a Smooth Peg
- sauravbhaumik
- · Replies 10 ·
Solving Circuits with Kirchhoff's Rules
- physicssux
- · Replies 3 ·
Problem involving Moment of Inertia
- bilals
- · Replies 4 ·
How Does Melting Ice Affect System Displacement in a Gravity-Free Environment?
- neelakash
- · Replies 15 ·
Weighing In on Different Planets: Radii and Mass
- lep007
- · Replies 5 ·
Basketball shot release speed with 25-degree launch angle
- interpretasl
- · Replies 6 ·
Calculating Second Moment of Area about X and Y Axes - Example Problem
- Bradracer18
- · Replies 10 ·
Understanding Kirchhoff's Circuit Problem: Finding Currents in a Complex Circuit
- Boulderbison19
- · Replies 3 ·
Electron through hole and probability density in metal
- kingwinner
- · Replies 7 ·
How Do You Calculate the Decay Constant from Radioactivity Measurements?
- GTBuzz42
- · Replies 5 ·
Finding support reactions for a truss with pin and rocker supports
- RadiationX
- · Replies 6 ·
Calculating Current in Circuits With o.3μF Capacitor and 40Ω Resistor
- natural
- · Replies 1 ·
Motion of Charged Particles in Electric Fields
- simplicity12
- · Replies 2 ·
Conservation of Momentum in an Isolated System: A Derivation
- dotcom
- · Replies 4 ·
Forming Proper Equation to Calculate Speed of Spaceship
- ND3G
- · Replies 2 ·