air gun history

In the beginning of the 17 t h century, scientists started realising that some form of matter can exist in a form that is similar to air. The Belgian Chemist Jan Baptista van Helmont coined the word Gas by altering the Greek word "Chaos" which means "Space". This word explains the ability..

In the beginning of the 17 t h century, scientists started realising that some form of matter can exist in a form that is similar to air. The Belgian Chemist Jan Baptista van Helmont coined the word Gas by altering the Greek word "Chaos" which means "Space". This word explains the..

Accidents - Large area of forest catches wild fire accidentally. If not controlled in time by proper methods, fire grows out of proportion. In the last 5 years two major wild fires (in USA and Malaysia) are recorded. Each of them has sent an estimated 1.5 million tons of CO 2 to atmosphere. Over ye..

A mixture is a material containing two or more elements or compounds that are in close contact and are mixed in any proportion. The components of a mixture can be separated by physical means. For example, air, gun powder, et..

Application of Bernoulli's Theorem - The working of spray-gun is based on Bernoulli's theor..

Question: A boy fires a gun and hears the echo 2 seconds later. If he is 480 m away from a wall, calculate the velocity of sound in air. Answer: v = = = 480 m s - 1..

Introduction - In the second century AD a Greek writer named Lucian wrote a story about a trip to the moon. He did not even know how far the moon was but his story revealed that the idea of space travel was certainly not new. Much later in 1865, the French novelist Jules Verne wrote a story in whic..

. In these methods, the energy is said to be transferred in the form of waves. Other examples of energy propagation by transfer of matter are Electric current in a wire Air currents set up by unequal heating of the surface of the Earth Ocean tides in which energy is transmitted by a fluid..

Discovery of Oxygen - Two scientists, Carl Scheele of Sweden and Joseph Priestly of England working independently, discovered oxygen. They published their discovery in 1777. Scheele obtained oxygen by heating potassium nitrate and mercuric oxide and called it "Fire Air". Priestley called ..

Projectiles - So far we have studied only the motion of an object under only one force. In this section we are going to study the motion of an object acted upon by two forces acting at right angles to each other. When an object is thrown horizontally from a certain height from the ground, then the ..