Antonie van Leeuwenhoek, a merchant from the Netherlands, was among the first to observe microorganisms with a magnifying lens. Since 1673, Leeuwenhoek wrote letters describing small creatures he called animalcules to the Royal Society of London. Through his simple microscope consisting of 1 lens, Leeuwenhoek sent pictures of animalcules in
Did you know that when the plane takes off or wants to land (landing), the plane requires a certain slope in order to fly or arrive at the runway perfectly? Well, one of the mathematical calculations that can be applied in determining the inclination of the fuselage when taking off
Linear Equation System Linear systems of equations are linear equations that are correlated to form a system. The system of equations can consist of one variable, two or more variables. In this discussion, we only discuss systems of linear equations with two and three variables. Vector Arithmetic & Geometry Series
Electron configuration is the arrangement of electrons in an atom, molecule and other physical structures. Like other elementary particles, electrons follow the laws of quantum mechanics and display the properties of both particles and waves. Knowledge of the electron configuration of atoms is very useful in helping to understand the
There are several methods people used decades ago to try to digest a thick book in less than an hour. The most obvious method, which we all do from time to time, is skim read or skim a passage and scroll through pages looking for keywords. Or the method of
A chemical reaction is a process that is usually characterized by a chemical change in which the starting materials (reactants) differ from the products. Chemical reactions tend to involve the movement of electrons, which causes the formation and breaking of chemical bonds. There are several types of chemical reactions and