Class notes that cover the unit circle and now it is related to trigonometry. It starts first with a brief introduction to what is a unit circle. Then, it uses trigonometry to explain who the unit circle could used and some example problems are provided to show its usages.

A worksheet for students when studying about the three domains and the six kingdom of organisms. It can used for in-class assignments or as homework.

This is a presentation made from class notes covering the subject of Gibbs Free energy and its role in the reaction’s spontaneity and in equilibrium. Clarifications are given regarding how the Gibbs free energy equation was derived from the entropy equation using the second law of thermodynamics. Two examples problems are provided with step-by-step solutions to display how to use the free energy equation. Useful for giving out lectures, reviews and for reference.