There are many types of rainbows, which may not be common knowledge. Learn about the fogbow, the lunar rainbow, and other interesting types, and how they each form.

Explains what the electron shielding effect is, how to calculate the amount of nuclear charge in an atom, how to use the number of orbitals to find the number of electrons in an atom, and Slater's method of calculating the shielding...

Explains what the Tyndall Effect is and uses a diagram to model its impact on two different mixtures. Includes causes, examples, a look at suspensions and solutions, and an experiment to try.

Read about the non-metallic elements in the halogen family, what their chemical and physical properties are, their uses, and some interesting facts about them.

Describes the chemical and physical properties of the chalcogen group of elements, also known as the oxygen group.

Explains the concept of equilibrium and what static equilibrium is, gives some examples, and models how to calculate static equilibrium through some problems with detailed solutions.

Describes the basic structure of a hydraulic system and what is involved in rebuilding a hydraulic cylinder. It presents three different problem scenarios and strategies for repairing the cylinder.

Learn about the different types of thermometers, their applications, and how they work.

Read about the history of the thermometer and the different types of thermometers and temperature scales that were invented.

A manometer is used to measure the pressure of a gas or fluid. This article explains the principle behind the working of manometers, the different types, and how they are used. Formulas used to calculate pressure are also given.

A phase converter is a special device used to convert electric power from a single-phase source into three-phase power in situations where that is required. Read about how a rotary phase converter works.

A phase converter is a special device used to convert electric power from a single-phase source into three-phase power in situations where that is required. Read about the different types of phase converters, how they work, and their...

This article explains what voltaic cells and electrolytic cells are, how they work, their construction, the reactions that take place within them, and the similarities and differences between them.

Explains what welding is and provides a detailed comparison of three different methods of doing it, including their processes, uses, advantages, and disadvantages.

Explains how a dry cell battery works, the chemical reactions that take place in it, how to use a multimeter to test its strength, what dry cell batteries are used for, their advantages, and about recycling. [The article suggests placing...

Learn about sodium bicarbonate, its chemical properties, how it is produced, where it is found, and its many uses.

This article looks at the properties of coal, graphite, and diamonds, all of which are made from carbon, and explains why they are different. The formation of diamonds inside the Earth is described, and the theories around whether or not...

Many things invented by NASA are used in everyday life. Some of the most widely used inventions are described here.

Describes five inventions of Archimedes and the stories behind them.

Describes Thomas Edison's inventions in chronological order from 1868 to 1915, with mention of his contribution to World War I.

This resource presents a long list of important inventions during the First Industrial Revolutions, organized consecutively from 1701-1839. Includes short descriptions and images. This is followed by a table listing inventions from the...

Provides an overview of movements in the history of industrial design and a list of significant designers.

Discover the history of the first airplanes and flying machines, and how the Wright brothers constructed their first successful airplane.

Many modern items were invented in the 1800s. This resource presents a lengthy chronological list of significant inventions from the 1800s and their inventors.