Article last reviewed: 2017 | St. Rosemary Institution © 2010-2018 | Creative Commons 4.0

Pre-eclampsia and eclampsia are disorders in pregnant women. Pre- eclampsia is hypertension and eclampsia is the worsening of pre-eclampsia where the woman experiences convulsions or goes into a coma. The complication of eclampsia in a pregnant woman can put her and her unborn child at risk. A risk that may be fatal. This is only…

Few people recognize his name today, and even among those who do, the words Nikola Tesla are likely to summon up the image of a crackpot rather than an authentic scientist. Nikola Tesla was possibly the greatest inventor the world has ever known. He was, without doubt, a genius who is not only credited with…

Black Light. What is it? It is a portion of the Ultra-Violet Spectrum that is invisible to our eyes. We cannot distinguish it. However, when this radiation impinges on certain materials visible light is emitted and this is known as “fluorescence.” Fluorescence is visible to the human eye, in that it makes an object appear…

At the time Georg Simon Ohm was born not much was known about electricity, he was out to change this. Georg grew up in Bavaria which is why most information about Georg is in German. There is even a College named after him: Georg-Simon-Ohm Fachhochschule Nuernberg. To much dismay not a whole lot has been…

With this definition of the flux being, we can now return to Faraday’s investigations. He found that the magnitude of the emf produced depends on the rate at which the magnetic flux changes. This fundamental result is known as Faraday’s law of induction. The minus sign is placed there to remind us in which direction…

The shuttle, a manned, multipurpose, orbital-launch space plane, was designed to carry payloads of up to about 30,000 kg (65,000 lb) and up to seven crew members and passengers. The upper part of the spacecraft, the orbiter stage, had a theoretical lifetime of perhaps 100 missions, and the winged orbiter could make unpowered landings on…

A gun is a weapon that uses the force of an explosive propellant to project a missile. Guns or firearms are classified by the diameter of the barrel opening. This is known as the calibre of the gun. Anything with a calibre up to and including .60 calibre(0.6 inches) is known as a firearm. The…

In the Geiger-Muller tube, particles ionize gas atoms. The tube contains a gas at low pressure. At one end of the tube is a very thin “window” through which charged particles or gamma rays pass. Inside the tube is a copper cylinder with a negative charge. A rigid wire with a positive charge runs down…

In the modern society, radio is the most widely used medium of broadcasting and electronic communication : it plays a major role in many areas such as public safety, industrial manufacturing, processing, agriculture, transportation, entertainment, national defense, space travel, overseas communication, news reporting and weather forecasting. In radio broadcasts, they use the radio waves which…

Chromium is a very hard, brittle, gray metal, which is sometimes referred to as Siberian red lead. It does not rust easily and becomes shiny and bright when it is polished. The shiny trim on our automobile bumpers and door handles is usually electroplated chromium. Most chromium comes from something called chromite which is a…

Charles Babbage may have spent his life in vain, trying to make a machine considered by most of his friends to be ridiculous. 150 years ago, Babbage drew hundreds of drawings projecting the fundamentals on which today’s computers are founded. But the technology was not there to meet his dreams. He was born on December…

How Wind Tunnels Work A wind tunnel is a machine used to fly aircraft’s, missiles, engines, and rockets on the ground under pre-set conditions. With a wind tunnel you can chose the air speed, pressure, altitude and temperature to name a few things. A wind tunnel is usually has a tube like appearance with which…

Zeno of Elea was born in Elea, Italy, in 490 B.C. He died there in 430 B.C., in an attempt to oust the city’s tyrant. He was a noted pupil of Parmenides, from whom he learned most of his doctrines and political ideas. He believed that what exists is one, permanent, and unchanging. Zeno argued…

Sir Isaac Newton and Gottfried Wilhelm Leibniz are two of the most supreme intellects of the 17th century. They are both considered to be the inventors of Calculus. However, after a terrible dispute, Sir Isaac Newton took most of the credit. Gottfried Wilhelm Leibniz (1646-1716) was a German philosopher, mathematician, and statesman born in the…

Trigonometry uses the fact that ratios of pairs of sides of triangles are functions of the angles. The basis for mensuration of triangles is the right-angled triangle. The term trigonometry means literally the measurement of triangles. Trigonometry is a branch of mathematics that developed from simple measurements. A theorem is the most important result in…

Paul Adrien Maurice Dirac (1902-1984), known as P. A. M. Dirac, was the fifteenth Lucasian Professor of Mathematics at Cambridge. He shared the Nobel Prize for Physics in 1933 with Erwin Schrodinger.[2] He is considered to be the founder of quantum mechanics, providing the transition from quantum theory. The Cambridge Philosophical Society awarded him the…

Leonhard Euler, (born April 15, 1707, died Sept. 18, 1783), was the most prolific mathematician in history. His 866 books and articles represent about one third of the entire body of research on mathematics, theoretical physics, and engineering mechanics published between 1726 and 1800. In pure mathematics, he integrated Leibniz’s differential calculus and Newton’s method…

Georg Cantor founded set theory and introduced the concept of infinite numbers with his discovery of cardinal numbers. He also advanced the study of trigonometric series and was the first to prove the nondenumerability of the real numbers. Georg Ferdinand Ludwig Philipp Cantor was born in St. Petersburg, Russia, on March 3, 1845. His family…

The Fibonacci numbers were first discovered by a man named Leonardo Pisano. He was known by his nickname, Fibonacci. The Fibonacci sequence is a sequence in which each term is the sum of the 2 numbers preceding it. The first 10 Fibonacci numbers are: (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89).…

Geometry was thoroughly organized in about 300 BC, when the Greek mathematician Euclid gathered what was known at the time, added original work of his own, and arranged 465 propositions into 13 books, called ‘Elements’. The books covered not only plane and solid geometry but also much of what is now known as algebra, trigonometry,…