Essay Database

Principles Each mobile uses a separate, temporary radio channel to talk to the cell site. The cell site talks to many mobiles at once, using one channel per mobile. Channels use a pair of frequencies for communication—one frequency…

it was mainly the people around them who were fighting and disagreeing about the relationship. Romeo and Juliet mainly kept out of the fighting but their lives were made miserable and unhappy by the people around them who were interfering, and because…

exactly how to listen to music through these amazing machines. There are many steps in this process, but the first step is crucial, music choice. Then the process of getting the music to come out of the speakers or headphones begins. Music choice…

century how those strange, noisy contraptions dubbed 'horseless carriages' would revolutionize our lives. In fact, such a comment would bring laughter to many, because the horse and buggy was a way of life.         But, as…

started about 40 years ago. People flew before we mastered snow travel. The first snowmobile wasn't built until 1908, 5 years after the Wright Brothers flew their plane. This "snowmobile" was actually a large machine like a steam locomotive with …

painted on the side lands at Le Bourget field, in the midst of thousands of cheering spectators. A tall, thin, sandy haired, twenty-five-year-old man emerges from the cockpit and timidly smiles. Modestly, he says 'well, I made it.' (http://141.224…

to the industrialization and prosperity of a country. Although engineering improvements sometimes come through trial and error they are most often achieved by applying pure science and mathematics to engineering. Canadian engineering was improved…

in the birth of automation, American inventor, pioneer, mechanical engineer, and manufacturer Eli Whitney. Best remembered as the inventor of the cotton gin. He made his first violin when he was only 12. Eli started college when he…

because I have always been fascinated with trains and railroads from the time I was born. When I was little I had little electric trains sets that I would play with. Then as I got older my fascination with railroads went into more detail with school…

were known for their majestic presence in the sky and were icons of a country's power and prestige. They reigned mostly as reconnaissance and transport utility aircraft but there was something about this 'lighter-than-air' ship that made it far more…