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Bending Light
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Explore bending of light between two media with different indices of refraction. See how changing from air to water to glass changes the bending angle. Play with prisms of different shapes and make rainbows.

Subject:
Physics
Science
Material Type:
Interactive
Provider:
PhET Interactive Simulations University of Colorado Boulder
Author:
Emily Moore
Kathy Perkins
Noah Podolefsky
Sam Reid
Trish Loeblein
University of Colorado at Boulder
Date Added:
05/09/2011
Coulomb's Law
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Visualize the electrostatic force that two charges exert on each other. Observe how changing the sign and magnitude of the charges and the distance between them affects the electrostatic force.

Subject:
Physics
Science
Material Type:
Interactive
Provider:
PhET Interactive Simulations University of Colorado Boulder
Author:
University of Colorado Boulder
Date Added:
12/04/2020
Molecule Polarity
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When is a molecule polar? Change the electronegativity of atoms in a molecule to see how it affects polarity. See how the molecule behaves in an electric field. Change the bond angle to see how shape affects polarity. Need to have JAVA installed to view the Real Molecules pportion of the simulation.

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations
Author:
University of Colorado Boulder
Date Added:
09/27/2011
Molecule Shapes
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Explore molecule shapes by building molecules in 3D! How does molecule shape change with different numbers of bonds and electron pairs? Find out by adding single, double or triple bonds and lone pairs to the central atom. Then, compare the model to real molecules!

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations
Author:
University of Colorado Boulder
Date Added:
10/10/2011
Molecules and Light
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Turn light source on to explore. Observe what happens in the observation window as you set up different combinations of light source and molecule. Note this simulation is the first to support our pan and zoom feature, so zoom in for a closer look, if you need to.

Subject:
Physics
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations University of Colorado Boulder
Author:
University of Colorado Boulder
Date Added:
10/01/2010
PhET Interactive Simulations: Acid-Base Solutions
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How do strong and weak acids differ? Use lab tools on your computer to find out! Dip the paper or the probe into solution to measure the pH, or put in the electrodes to measure the conductivity. Then see how concentration and strength affect pH. Can a weak acid solution have the same pH as a strong acid solution?

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations
Author:
University of Colorado Boulder
Date Added:
09/01/2010
PhET Interactive Simulations: Beer's Law Lab
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ÒThe thicker the glass, the darker the brew, the less the light that passes through.Ó Make colorful concentrated and dilute solutions and explore how much light they absorb and transmit using a virtual spectrophotometer!

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations
Author:
University of Colorado Boulder
Date Added:
05/14/2012
PhET Interactive Simulations: Concentration
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Watch your solution change color as you mix chemicals with water. Then check molarity with the concentration meter. What are all the ways you can change the concentration of your solution? Switch solutes to compare different chemicals and find out how concentrated you can go before you hit saturation!

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations
Author:
University of Colorado Boulder
Date Added:
03/09/2012
PhET Interactive Simulations: Molarity
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What determines the concentration of a solution? Learn about the relationships between moles, liters, and molarity by adjusting the amount of solute and solution volume. Change solutes to compare different chemical compounds in water.

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations
Author:
University of Colorado Boulder
Date Added:
09/13/2021
Rutherford Scattering
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How did Rutherford figure out the structure of the atom without being able to see it? Simulate the famous experiment in which he disproved the Plum Pudding model of the atom by observing alpha particles bouncing off atoms and determining that they must have a small core.

Subject:
Chemistry
Science
Material Type:
Interactive
Provider:
PhET Interactive Simulations University of Colorado Boulder
Author:
University of Colorado Boulder
Date Added:
03/01/2007
States of Matter
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Watch different types of molecules form a solid, liquid, or gas. Add or remove heat and watch the phase change. Change the temperature or volume of a container and see a pressure-temperature diagram respond in real time. Relate the interaction potential to the forces between molecules.

Subject:
Physics
Science
Material Type:
Interactive
Provider:
PhET Interactive Simulations University of Colorado Boulder
Author:
University of Colorado Boulder
Date Added:
07/18/2011
pH Scale
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Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
PhET Interactive Simulations
Author:
University of Colorado Boulder
Date Added:
07/01/2008