Wednesday, June 6, 2012


The Fastest Ball Challenge

This project is a challenge which the objective is to determine the angle of inclination so that the ball bearing would travel the quickest across the horizontal track.

The theoretical background is about the conservation of energy principle. The principle is supposed to be used to solve the challenge. 
One way to state this principle is "Energy can neither be created nor destroyed". Another approach is to say that the total energy of an isolated system remains constant.

Extraction of Caffeine from Beverages

This project is to extract caffeine from tea. The objectives of this project is to let us experience and learn about Buchner filtration, solvent extraction, and distillation using a rotary evaporator. Buchner filtration is about using a suction to help in normal filtration. Solvent extraction is about 2 layers of solvents and the solubility of organic compounds in these solvents. The rotary evaporator is used to evaporate the solvent that the chemical compound of interest is solubilized in.

Solvent extraction
Buchner filtration

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