Who Discovered Coal?

Coal is a kind of sedimentary rocks that can be easily combusted. The coal is typically found in layers that was formed hundreds of millions years ago, from buried forests in the presence of high temperature and pressure the . Coal is composed from hydrogen, oxygen, sulfur and nitrogen combined with the main component carbon. …

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Who Invented The Artificial Pacemaker?

The artificial pacemaker is the device which controls the heart beats in order to help the patients who have cardiac problems. The idea appeared first in the year 1899, by the British J.A. McWilliam when he discovered that an electrical impulse can affect the heart by controlling the ventricular contractions reaching 60 or 70 beat/minute. …

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Who Discovered Telescopes?

Our Solar System is composed from the sun along with the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The Solar System has been formed about 4.6 billion years ago, the sun equals about 98-99% of the Solar System mass while the mass of the 8 planets that orbit around the sun equals only …

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Who Discovered X-Ray?

X-rays (X-radiation) are shorter in the wavelength ultraviolet and longer in wavelength than gamma rays. In 1895, the German physicist Wilhelm Röntgen (1845-1923) noticed that there were unknown rays when he was working on his lab with a cathode radiation tube. Wilhelm Röntgen was awarded the first Nobel prize in physics in 1901 for discovering …

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Who Invented Airplane?

The first trial of manufacturing a flight machine was made by the Greek Archytas in the beginning of the 5th century B.C., he tried to fly a bird shape model using steam power. In the 9th century, the first trial of flying was by Abbas Ibn Firnas (810–887) the Arabic physician, engineer, and inventor using …

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Who Discovered Diabetes?

Diabetes is a chronic disease where the patient suffers a high percentage of sugar in the blood. The main symptoms of the diabetes are recurrent urination and increasing thirst and hunger. Diabetes can be classified to 3 main types according to its causes and some other types which are not so common. *Type 1 diabetes, …

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Who Discovered Light?

The sun has been the main source of light for millions of years, light travel from the sun to the earth through space till it reaches earth. The distance that light has to cover is measured by the light year which equals 9.4605284*1015 meters. In the year 1838 Friedrich Bessel (1784-1846) a German astronomer and mathematician was …

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Who Discovered Numbers?

Numbers include several parts as positive numbers, negative numbers, zero, rational numbers, irrational numbers and complex numbers. The scientists have discovered signs of tallying system on the caves and on bones, but no one can determine what was the tallying system counting. The natural numbers appeared in the first counting system which was put about …

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Who Discovered The Components of Atmospheric Air?

The atmospheric air is the several gases surrounding earth. It is one of the fundamental factors of starting life on earth and its continuity. The atmospheric air is considered the main cause of life on earth, as it is essential in the photosynthesis process and respiration. The atmospheric air consists of several gases: Oxygen with …

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