Skip to Main Content
Sign In
Please Sign In to Access
An invalid email address and/or password has been entered.
Email address
Password
Remember me
Forgot password?
No account?
Register
.
Resend email confirmation
Created 12/2/15. Updates available
online
.
Simulations
New Sims
Physics
Biology
Chemistry
Earth Science
Math
By Grade Level
Elementary School
Middle School
High School
University
By Device
Cutting Edge Research
All Sims
Translated Sims
Teaching Resources
Troubleshooting
FAQs
For Translators
Donate
Research
Licensing
About PhET
University
Switch to Index
Least-Squares Regression
Radiating Charge
Gene Expression - The Basics
Plate Tectonics
Fluid Pressure and Flow
Under Pressure
Normal Modes
Beer's Law Lab
Concentration
Molarity
Sugar and Salt Solutions
Molecule Shapes
Molecule Polarity
Resonance
Ramp: Forces and Motion
Forces and Motion
Neuron
Collision Lab
Capacitor Lab
Build a Molecule
Isotopes and Atomic Mass
Bending Light
Balancing Chemical Equations
Molecules and Light
Gravity and Orbits
Alpha Decay
Atomic Interactions
Balloons & Buoyancy
Balloons and Static Electricity
Band Structure
Battery Voltage
Battery-Resistor Circuit
Beta Decay
Blackbody Spectrum
Calculus Grapher
Charges and Fields
Circuit Construction Kit (AC+DC)
Circuit Construction Kit (DC Only)
Color Vision
Conductivity
Curve Fitting
Davisson-Germer: Electron Diffraction
Double Wells and Covalent Bonds
Eating & Exercise
Electric Field Hockey
Electric Field of Dreams
Energy Skate Park
Equation Grapher
Estimation
Faraday's Electromagnetic Lab
Faraday's Law
Forces in 1 Dimension
Fourier: Making Waves
Friction
Gas Properties
Generator
Geometric Optics
Glaciers
Gravity Force Lab
John Travoltage
Ladybug Motion 2D
Ladybug Revolution
Lasers
Lunar Lander
Magnet and Compass
Magnets and Electromagnets
Masses & Springs
Maze Game
Microwaves
Models of the Hydrogen Atom
Molecular Motors
Motion in 2D
My Solar System
Natural Selection
Neon Lights & Other Discharge Lamps
Nuclear Fission
Ohm's Law
Optical Quantum Control
Optical Tweezers and Applications
Pendulum Lab
pH Scale
Photoelectric Effect
Plinko Probability
Projectile Motion
Quantum Bound States
Quantum Tunneling and Wave Packets
Quantum Wave Interference
Radio Waves & Electromagnetic Fields
Radioactive Dating Game
Reactants, Products and Leftovers
Reactions & Rates
Resistance in a Wire
Reversible Reactions
Rutherford Scattering
Salts & Solubility
Self-Driven Particle Model
Semiconductors
Signal Circuit
Simplified MRI
Sound
States of Matter
Stern-Gerlach Experiment
Stretching DNA
The Greenhouse Effect
The Moving Man
The Ramp
Torque
Vector Addition
Wave Interference
Wave on a String
Gene Machine: The Lac Operon
Circuit Construction Kit (AC+DC), Virtual Lab
Circuit Construction Kit (DC Only), Virtual Lab
Density
Acid-Base Solutions
Buoyancy