General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

Complex numbers and complex variables

Science; General science

A natural and extremely useful extension of the familiar real numbers. They can be introduced formally as follows. Consider the two-dimensional real vector space consisting of all ordered pairs ( a ...

Volcanic glass

Science; General science

A natural glass formed by rapid cooling of magma. Magmas typically comprise crystals and bubbles of gas within a silicate liquid. On slow cooling, the liquid portion of the magma usually ...

Biology

Science; General science

A natural science concerned with the study of all living organisms. Although living organisms share some unifying themes, such as their origin from the same basic cellular structure and their ...

Open channel

Science; General science

A natural or artificial conveyance through which liquid (typically water) having a free surface moves. The free surface is the interface with a gas (usually the atmosphere), along which the pressure ...

Geyser

Science; General science

A natural spring or fountain which discharges a column of water or steam into the air at more or less regular intervals. It may be regarded as a special type of spring. Perhaps the best-known area ...

Emery

Science; General science

A natural mixture of corundum with magnetite or with hematite and spinel. Emery has been used for centuries as an abrasive or polishing material. Because the mixture is very intimate and appears to ...

Araneae

Science; General science

A natural order of the class Arachnida, also called Araneida, commonly known as the spiders. These animals are widespread over most of the land areas of the world and are well adapted to many ...