air university catalog

Summary - The solar system consists of sun, the nine planets and their satellites and thousands of other smaller heavenly bodies such as asteroids, comets and meteors. The sun is a star of intermediate size and luminosity. The sun appears to be larger and brighter than other stars because it is nea..

For thousands of years, air was considered to be a mixture of many gases. The true composition of air was not known for a long time. Air is a mixture of various gases. The main gases present in air are nitrogen (78.1% by volume) and oxygen (20.9% by volume)..

Physical Properties - Hydrogen is a colourless, odourless and tasteless gas. Impure hydrogen has a fishy smell due to its impurities ,arsine and phosphine. Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about 90% of the universeh..

Summary - Hydrogen is the most abundant element in the universe. Hydrogen is also the lightest element in the universe. It has a vapour density of 1, which is 14.4 times lighter than air. Hydrogen is absent in the free state in the earth's atmosphere. But in the combined state i..

Take a look at your surroundings. You may find a pencil, a book, an apple, a table or a chair. Can you feel the air blowing? These are different forms of matter. One or more of our senses can recognize these. These objects possess mass, occupy space and have different shapes, sizes and c..

Mercury is the smallest planet in the solar system and it is nearest to the sun. It is a bare, rocky planet not much larger than our moon. There is no water or air on mercury. By day it is hotter than the hottest desert. At night, it is freezing cold. The ground is covered with craters fo..

Some objects have a wide range of lengths in the universe. They are tabulated below in the order of magnitude of their lengths. Size/distance of the object Order of magnitude of length (m) Radius of nucleus 10 -14 Diameter of an atom 10 -10 Radius of hydroge..

Some objects have a wide range of lengths in the universe. They are tabulated below in the order of magnitude of their lengths. Size/distance of the object Order of magnitude of length (m) Radius of nucleus 10 -14 Diameter of an atom 10 -10 Radius of hydroge..

Structure of Atom - When scientists started exploring matter, they discovered that the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called and 'atom'. Just how small these atoms are can be made out if you realize that there are ab..

. (i) Water is called the "Universal Solvent". Almost all substances dissolve in water to a certain extent. Hence, it known as a universal solvent. Because of this property, it is impossible to get chemically pure water on the earth. Air dissolves in water to a certain..