Saturn (0)

Sarnased õppematerjalid

1

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Planet venus

Venus Venus has been known since prehistoric times and the planet is named after Venus, the Roman goddess of love. It is the second-closest planet to the Sun and it`s often called Earth's "sister planet," because the two are similar in size, gravity, and bulk composition. Because of these similarities, it was thought that Venus might even have life. Venus is also called the Morning star or the Evening star, because it reaches its brightness shortly before sunrise or shortly after sunset. It is the brightest object in the sky except for the Sun and the Moon. During the last few years the scientists have found that Venus and Earth are very different. It has no oceans and is surrounded by a heavy atmosphere composed mainly of carbon dioxide with virtually no water vapor. There are strong winds at the cloud tops but winds at the surface are very slow, no more than a few kilometers per hour. The surface of Venus retains a constant temperature between

Inglise keel

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Energy - põhjalik referaat energiast

SISUKORD ENERGY STORY................................................................................................................4 USES OF ENERGY............................................................................................................. 4 2.1 Uses of energy in homes...............................................................................................5 2.2 Types of energy used in homes.................................................................................... 6 2.3 Energy use in different types of homes........................................................................ 6 2.4 Commercial Energy Use...............................................................................................9 2.5 Industrial and Manufacturing Energy Use..................................................................11 2.6 Transportation Energy Use.........................................................................................12 RENE

Inglise keele foneetika ja fonoloogia

4

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The Cataclysmic Death of Stars

The Cataclysmic Death of Stars Republished from the pages of National Geographic magazine Written by Ron Cowen March 2007 Ever since he was a teenager, Stan Woosley has had a love for chemical elements and a fondness for blowing things up. Growing up in the late 1950s in Texas, "I did everything you could do with potassium nitrate, perchlorate, and permanganate, mixed with a lot of other things," he says. "If you mixed potassium nitrate with sulfur and charcoal, you got gunpowder. If you mixed it with sugar, you got a lot of smoke and a nice pink fire." He tested his explosive concoctions on a Fort Worth golf course: "I screwed the jar down tight and ran like hell." "kaboomWoosley", now an astronomer at the University of California at Santa Cruz, has graduated to bigger explosions--much bigger. Woosley studies some of the most powerful explosions since the birth of the universe: supernovae, the violent deaths of stars. The universe twinkles with these cataclysms. They happen every sec

Inglise keel

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Teaduslik revolutsioon

he thought, learned nothing since their earliest encounter with Aristotle. Around 1609 Galileo had news of a development from Holland a lens grinder had taken two lenses and placed them at opposite ends of a metal tube. A rudimentary telescope was the result. Galileo made his own telescope as well as a compound microscope. Galileo directed all of his attention to the heavens. He was the first man to see craters on the moon, sun spots and the rings of Saturn. He also observed the phases of Venus. He determined that the Earth's moon was not a source of light but rather of reflected light. He saw the moons of Jupiter. And of course, Galileo was also a Copernican: "Sol est centrum mundi, est omnio immobile motu locali," ("The sun is the center of the universe and the earth moves.") In 1611, Galileo packed his brass telescope in his bag and decided to go to Rome. Criticism of Galileo's observations began immediately

Ajalugu

171

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2-stroke tuners handbook tuners

 Two-Stroke TUNER’S HANDBOOK By Gordon Jennings Illustrations by the author Copyright © 1973 by Gordon Jennings Compiled for reprint © 2007 by Ken i  PREFACE Many years have passed since Gordon Jennings first published this manual. Its 2007 and although there have been huge technological changes the basics are still the basics. There is a huge interest in vintage snowmobiles and their “simple” two stroke power plants of yesteryear. There is a wealth of knowledge contained in this manual. Let’s journey back to 1973 and read the book that was the two stroke bible of that era. Decades have passed since I hung around with John and Jim. John and I worked for the same corporation and I found a 500 triple Kawasaki for him at a reasonable price. He converted it into a drag bike, modified the engine completely and added mikuni carbs and tuned pipes. John borrowed Jim’s cop

Mootor

20

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Energeetika arengu plaanimine

ELEKTROENERGEETIKA INSTITUUT Referaat Taastvad Energiaallikad Esitamise tähtaeg 14.04.2009 Õppejõud: Hannes Agabus Tudeng: Sergei Belosapko Nikita Naumov Tallinn 2009 Contents: 1. Renewable energy 1.1. Costs................................................................................................................... 2 1.2. Potential future utilization..............................................................................4 1.3. Why Don't We Use More Renewable Energy? ...........................................5 2. Energy Types 2.1. Wind Energy.......................................................................................................6 2.1.1. Annual Generation........................................................................................7 2.1.2. Growth and cost trends.........................

Energeetika arengu plaanimine

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ppt

Green Energy presentation

Green Energy Program paid for and brought to by -Anja Bananja -Franz the Manz - And Just Chadrick Overview- What is Green Energy? Different Types? What is sustainability? German Green Energy Cost and Efficiency Recycling What is Green Energy? -It is energy resources that are renewable -Can be naturally replenished -Clean, Safe and not harmful to the environment (aka mother earth)  Types of Green Energy Green Energy going cute  Solar Power · Is produced by using photovoltaic cells, which capture sunlight and turns that into energy. Problems ? -The sun has got to shine -The cost of solar panels and the systems range between $20k-40k -The light from the sun produces a very small amount of energy  Wind Power -These giant pinwheels spin from strong winds which spins a turbine of a generator to produce energy. Gian

Inglise keel

16

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SCIENCE AND TECHNOLOGY

SCIENCE AND TECHNOLOGY A century ago communication across any distance was dependent upon the telegraph or letters. No jets crossed the ocean, no television pictures enabled us instantly to see events in any part of the world, there were no worldwide telephone networks and no computers. It is just a short lifetime since humanity first travelled into space and discovered how fragile our planet looks. FROM FIREWORKS TO THE MOON At first glance you might think that there couldn't possibly be anything common between a 13 th century festival in China and the Apollo 11 moon landing in 1969. However, there is a link and that is that they both relied on the use of rockets. The Chinese first developed rockets by filling bamboo tubes with an explosive made from saltpetre, charcoal, and sulphur. The sealed tubes would be thrown onto fires during celebrations because it was thought that the loud explosions would protect them. It wa

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