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Category Archives for "Science and Engineering"

What Is a Polynomial

Polynomial is an algebraic expression which is a combination of constants and the variables. The numbers like 1,2, -3 are the constants and the variables are x, y, and so on. Both of these combine to form a polynomial, which literally means many terms. Thus polynomials can be of more than one term. It is […]

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Who Invented the First Compound Microscope

Greeks were equipped with fully efficient radiant heating method operating around 2000 yrs before its introduction in United States. This was the time when foundation of compound microscope was traced in china. However, it is hard to determine the originator of “First Compound Microscope”. Some authorities think that Dutch Spectacles along with Zacharias Janssen created […]

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What Is a Chromatid

Chromatid is the term used to refer to each of the strands of replicated chromosome. One has to understand the fact that there is major difference between the two terms, ‘chromatid’ and ‘chromosome’. The chromatids that are exact copies of each other are joined at the center and this point of joining of the two […]

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What Is Enthalpy

Enthalpy of a system can be defined as the total energy present within a thermodynamic system. One has to understand that internal energy and enthalpy are two different concepts. The international system of units makes use of the unit Joule to measure enthalpy. However, the older units like the calorie and British thermal unit are […]

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What Is a Colloid

A colloid is a mixture, wherein the minute particles of one substance are evenly distributed throughout the second substance. The particles within a colloid are of the dimensions between 1 and 1000 nanometers, thereby, making it very difficult for the naked eye to recognize the individual particles. However, these tiny particles that make up the […]

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What is Magnesium

The element, magnesium, is the fourth most abundant element on the surface of the earth. It is denoted by the symbol, ‘Mg’ and has an atomic number of 12. The valency of magnesium is 2 and this is the main reason as to why magnesium is a highly reactive metal. Owing to this feature of […]

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What Are Valence Electrons

Valence electrons are the electrons present in the outermost shell of the atom. These are the electrons that play a significant role in determining the reactivity of the particular element. The reason for this can be given to lie in the fact that valence electrons are the ones that take part in formation of chemical […]

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What is the Doppler Effect

Doppler Effect is the apparent change in the frequency of a wave when the source producing the wave moves relative to the observer. The phenomenon derives its name from physicist, Christian Doppler who first explained by in the year 1842. The most common experience with Doppler Effect is felt when a source of sound approaches […]

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What is Algae

Algae are aquatic form that has vast resources of bio chemicals, still remains instinct for not being explored in a right way. Algae were treated as diverse group of organisms in the past to match it into a single class of plants.  Initially, algae were also considered as mare plants without leaf, stem, root and […]

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What is Entropy

The tendency of a particle to move from higher levels of organization and structure to lower levels is known as Entropy. This tendency happens in the molecular levels. This phenomenon is regularly seen by everyone in their day to day activities. This concept when considered in physics relates to the second law of thermodynamics. In […]

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What is Genetic Engineering

Genetic engineering is the modification done to a genome of an organism. This is done with the help of new and advanced DNA technology. Genetic engineering is to introduce a new element or to change the DNA structure with the main aim of bringing changes in to the organism. This introduction of new DNA does […]

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What is a Light Year

Light year is a measure which is used to calculate the distance travelled by light in an empty space or a vacuum in a year. The movement of light in the empty space is close to 299.792 km per second. When calculated, the sun travels approximately 9.4 trillion km in a year. This measurement is […]

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What is Conduction

The process of transfer of heat form one molecule to another is known as conduction. When a particular set of molecules gain energy, this energy is transferred from one to another. This transfer of heat is also happens in the form of convection and radiation. The substances which easily transfer the heat are known as […]

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What Is Natural Selection

Natural selection is the theory which states that the animals possess beneficial traits which they pass from one generation to another. This theory is proposed by Charles Darwin. There are differences between the natural selection and evolution. Evolution basically refers to the development of the entire biological organism in the course of generations. Whereas, the […]

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What Is Nuclear Energy

The energy that is generated due to the nuclear fission is known as the nuclear energy. Both the heat and electricity can be generated through nuclear fission. Presently, many countries use the nuclear energy for constructive and also for the destructive purposes. The constructive purpose of the nuclear energy is to produce electricity using this […]

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How Big is the Universe

This is a question often asked by small kids. However, they should first understand what the universe means. The universe is a totality of all the elements, which exist. This can mean the solar system, all the satellites, and the Milky Way too. The size of the universe is immeasurable. One can say that the […]

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