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Tool: Exponential Decay
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Description: The applet below is a simulation of the law of radioactive decay. The red circles of this simulation symbolize 1000 atomic nuclei of a radioactive substance whose half-life period T1/2 amounts to 20 seconds. The diagram in the lower part of the applet represents the fraction of the nuclei that have not yet decayed at a given time t, predicted by the radioactive decay law.
Technology Type: Java Applet 
Author: W. Fendt
Language: English 
Cost: Does not require payment for use

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Story: Using "Exponential Decay" tool with Algebra II Online Class
Courses: Algebra II Growth and decay applications

Comment:Excellent description of Half-life decay, and applet wonderfully demonstrates it.