1. Who invented the BALLPOINT PEN? A. Biro Brothers Explanation: The Hungarian brothers‚ Laszlo and George Biro‚ made the first ball point pen in 1894. It followed the first workable fountain pen which was invented by L.E. Waterman in 1884. 2. In which decade was the first solid state integrated circuit demonstrated? A. 1950s Explanation: On September 12‚ 1958‚ Jack Kilby demonstrated the first working IC while working for Texas Instruments‚ although the U.S. patent office awarded the first
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Describe how atmospheric circulation gives rise to the formation of high and low pressure area? The origins of the creation of areas of differing pressures can be seen to start with the sun. As the sun gives off radiation some is absorbed by the earth‚ however this absorption is centred on the equator and therefore creates a disparity between the heat of the equator and tropics and the rest of the globe. Between 450 North and 300 South there is a positive heat budget whereas outside these regions
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Compressors are similar to pump‚ both increase the pressure on a fluid and both can transport a pipe. As gases are compressible‚ the compressor also reduces the volume of a gas. Liquids are relatively incompressible‚ while some can be compressed‚ the main action of a pump is to pressurize and transport liquids. Types of compressors The main types of compressors are shown below: Compressor types Positive displacement Dynamic 1. Reciprocating. 2. Rotary 1.Centrifugal. 2. Axial
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2. General Electric uses a multifaceted approach to help make them one of the industries leaders in engine production. This approach includes resources both financially and managerially. Financially General Electric has invested $50 million in new engine technology‚ with an additional $1.2 billion to $1.4 billion being required to help them bring new engine designs to the forefront. General Electric has also received a $20 million grant from NASA in order for them to create the first tester UDF
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formed. West Jet Airlines Ltd is a Canadian low-cost airlines that flies to most major cities in Canada and serves destinations in the United States‚ Mexico and the Caribbean. WestJet is the second-largest Canadian carrier behind Air Canada (third-largest including Air Canada Jazz). The present CEO‚ President of WestJet Airlines is Sean Durfy. Before West Jet 82% of the market share held y Air Canada. The legislative move was promoted by Air Canada’s competitive attack on West Jet Airlines
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of human biological activity where people usually sleep for eight hours and are awake for sixteen. There are two main types of circadian rhythm disorders: exogenous and endogenous. Examples of exogenous disorders include shift worker disorder and jet lag disorder. Some endogenous disorders include advanced sleep phase disorder‚ irregular sleep-wake rhythm‚ and the non-24-hour sleep-wake syndrome. The journal article “How to assess circadian rhythm in humans: A review of literature” reviews the
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HISTORY OF CIVIL AVIATION Air transport is the most modern‚ the quickest and the latest addition to the modes of transport. Because of speed with which aero planes can fly‚ travel by air is becoming increasingly popular. As far as the world trade is concerned it is still dominated by sea transport because air transport is very expensive and is also unsuitable for carrying heavy‚ bulky goods. However‚ transportation of high value light goods and perishable goods is increasingly being done by air
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Blade Element Theory Prof. Dr. Mustafa Cavcar Anadolu University‚ School of Civil Aviation Eskisehir‚ Turkey mcavcar@anadolu.edu.tr The simple momentum theory provides an initial idea regarding the performance of a propeller but not sufficient information for the detailed design. Detailed information can be obtained through analysis of the forces acting on a blade element like it is a wing section. The forces acting on a small section of the blade are determined and then integrated over
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The Cessna Citation X corporate jet is equipped with two Rolls-Royce AE 3007C engines capable of producing over 6‚400 lbf of thrust each‚ they propel the Citation X to a maximum speed equal to 92% of the speed of sound at altitude (.92 MACH). While these engines are extremely powerful‚ have amazing reliability‚ and operate in environmental extremes. The steps required to start‚ operate‚ and shutdown the Rolls-Royce AE 3007C Turbojet engine are relatively simple. Before starting the engines several
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Gas Compressor Brief Introduction A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are compressible‚ the compressor also reduces the volume of a gas. Liquids are relatively incompressible‚ so the main action of a pump is to pressurize and transport liquids. Types of Compressors Centrifugal compressors Centrifugal
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