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Physics Education Technology - University of Colorado, Boulder
PhET Blog

Archive for January, 2011

New Buoyancy Sim


When will objects float and when will they sink? Learn how buoyancy works with blocks. Arrows show the applied forces, and you can modify the properties of the blocks and the fluid.


Jan 26


Inquiry-Based Activities for Reactions & Rates

Reactions & Rates
Here’s a great lesson on reaction rates from Ms. Emily Firchau at Arapahoe High School. Thanks Emily!


Jan 18


Gene Machine: The Lac Operon Sim

Gene Machine: The Lac Operon

Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA.


Jan 12


Updated Greenhouse Effect Sim

Greenhouse Effect

We just published an updated version of the Greenhouse Effect. In this version, we restored cloud reflection and ice reflection features. (Thanks to the user who reported this bug!) You can now see how clouds and ice influence the amount of sunlight reaching the surface. We also fixed a control-panel layout issue occuring in the Japanese translation.


Jan 7


Improved Acid-Base Sim v1.01

Acid-Base Solutions

We improved our new Acid-Base Solutions sim to provide support for those with colorblindness.


Jan 5