Solar System is a planetary system that includes the central star – the Sun, and all the natural cosmic objects (planets, asteroids, comets, solar wind streams, etc.) that are bound by gravitational interaction. The Solar System formed about 4.6 billion years ago. The Solar System is part of the Milky Way galaxy. Sometimes the Solar …
Earth’s magnetic field is the magnetic field that surrounds Earth. It arises from the interaction between moving charges in Earth’s core and the surrounding environment. It creates the magnetosphere, which is the region around Earth where the magnetic field is present. The magnetosphere shields Earth from cosmic radiation. Some animals, such as birds and fish, …
Minerals are chemical compounds and simple substances with a crystalline structure and a clearly defined chemical composition formed as a result of geological and cosmic processes. Minerals are fundamental components of the Earth’s crust. The science that studies minerals, their origins, and species diversity is mineralogy. Classification of Minerals The first broad classification of known …
The Boltzmann constant (k or kB) is a physical constant that defines the relationship between temperature and energy. Her name is derived from the Austrian physicist Ludwig Boltzmann, who made significant contributions to the study of the statistical nature of heat and entropy. The Boltzmann constant is denoted as kB and has a value of …
Archimedes’ Law – a fundamental physical law discovered by the ancient Greek scientist Archimedes around the 3rd century BCE. Formulation of the Law For any body submerged in a fluid (or gas) at rest, there acts upon this fluid (or gas) an upward buoyant force or Archimedean force equal to the product of the density …
Pascal’s Law is a fundamental law of gas hydrodynamics formulated by the French mathematician and physicist Blaise Pascal in the 17th century. This law describes how changes in pressure affect gases in closed systems and is one of the fundamental properties of gases. Formulation of the law Pascal’s Law is formulated as follows: Liquids and …
An arithmetic progression (AP) is a numerical sequence in which each term, starting from the second one, is equal to the sum of the previous term and a constant number ‘d,’ which is called the common difference of the arithmetic progression. If the first term of the arithmetic progression is known as ‘a1’ and the …
The Avogadro’s law is a fundamental law of chemistry formulated by the Italian scientist Amedeo Avogadro in 1811. This law states that under the same conditions of temperature and pressure, equal volumes of any gas contain an equal number of molecules. Avogadro’s law can be expressed as follows: “The volumes of gases formed from the …
An electric arc is one of the types of electric discharge in a gas. An electric arc is a phenomenon where an electric current crosses the space between two electrodes, resulting in a discharge accompanied by a significant release of energy in the form of light, heat, and sound. It occurs due to the excitation …
Natural numbers are numbers used for counting and numbering objects in nature. They start from 1 and have no upper limit. The set of natural numbers is denoted by N = {1, 2, 3, 4, 5, …}. Main properties of natural numbers Operations on natural numbers Operations on natural numbers include addition, subtraction, multiplication, and …