hat can be produced from domestic resources. Although not widely used today as a transportation fuel‚ government and industry research and development are working toward the goal of clean‚ economical‚ and safe hydrogen production and hydrogen fuel cell vehicles. Hydrogen is the simplest and most abundant element in the universe. At Earthsurface temperatures and pressures‚ it is a colorless‚ odorless gas (H2 ). However‚ hydrogen is rarely found alone in nature. It is usually bonded with other elements
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to Congress‚ 2/24/09) Solar energy is the cleanest‚ most abundant‚ renewable energy source available which described as the sun’s rays that reach the earth and can then be converted into either thermal (heat) or electricity. Solar energy converted into heat can be used to: heat water for use in homes and buildings and heat spaces. Solar energy can be converted into electricity in two ways: 1) photovoltaic cells; and 2) solar thermal plants (also known as concentrated solar power or CSP)‚ which are
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Fighting For What Is Right Hannah Johnson‚ the mother of an African-American soldier and the daughter of a run away slave‚ writes to President Abraham Lincoln in hopes of emotionally appealing to him on the subject of equality amongst African-American soldiers. Johnson’s main argument‚ visited throughout her letter‚ is her deep concern for her son along with thousands of other African-American men fighting for their country and the unjust treatment they are receiving despite their service. Hannah
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A Character in Her Own Right Behind all the great men of Shakespeare‚ there is a women close behind‚ who is often over looked. These women are just as crucial of a character as the men they follow. In William Shakespeare’s Macbeth‚ Macbeth is a mere tool‚ there to carry out orders for his wife‚ both of whom desire nothing more than to rule. Together they will do anything‚ including murder‚ achieve their goal. Lady Macbeth proves to be a tragic figure and possess every capability that a man
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As we all know‚ education is very important in our lives. If you think that education is expensive just try ignorance. So‚ the challenge to us all isthen to prepare ourselves with the skills and academic knowledge necessary tobecome good citizens who are able to provide meaningful contributions to oursociety. Not only must we all be qualified academically but we also need to beprepared for hard work. No nation can achieve greatness if her citizens are lazy.Therefore‚ I am making a clarion call
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ABSTRACT: HELIOS project was a part of NASA’s ERAST programme (Environmental Research Aircraft and Sensor Technology). It was developed by NASA and Californian company AeroVironment Inc. ERAST programme develops pilotless solar powered airplane technology. The HELIOS construction is based upon its predecessors like NASA’s solar plane Pathfinder‚ which was successfully tested a few years prior to HELIOS. Due to its speed HELIOS was able to fly over the same spot for days or weeks‚ therefore‚ in
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Solar Energy Topics Solar technologies use the sun’s energy and light to provide heat‚ light‚ hot water‚ electricity‚ and even cooling‚ for homes‚ businesses‚ and industry. More basic information about solar is also available. Solar Technologies Photovoltaics (PV) Photovoltaic solar cells‚ which directly convert sunlight into electricity‚ are made of semiconducting materials. The simplest cells power watches and calculators and the like‚ while more complex systems can light houses and
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Oedipus All of Oedipus’ obstacles were an effect of his own actions. It all began when the Oracle at Delphi announced to Oedipus that he was destined to murder his father and marry his mother. He made the decision to escape the life he knew to stop this event from occuring. He was not aware that by doing so he was allowing the prophecy to happen and that he was entering his destiny of tragedy. When all is said and done‚ Oedipus was blind and found guilty for the death of the king of Thebes. Although
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from the Earth‚ a solar eclipse occurs when the Moon passes between the Sun and Earth‚ and the Moon fully or partially blocks the Sun. This can happen only at new moon‚ when the Sun and the Moon are in conjunction as seen from Earth. In a total eclipse‚ the disk of the Sun is fully obscured by the Moon. In partial and annular eclipses only part of the Sun is obscured.If the Moon were in a circular orbit close enough to the Earth and in the same orbital plane‚ there would be total solar eclipses every
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