Tuesday, November 13, 2012


Car Invention
A motor vehicle consists of a set of mechanical parts working in a harmonious way to move this vehicle, and the car is the most widespread means of transport in the present era.

Cars are divided into several types, including small cars, and most are owned by ordinary people who use them to go to work or move their family from one place to another and on excursions. Large buses are used to transport passengers, throughout the country; large trucks are used to transport goods, and thus is considered a key element in the industrialized countries to boost the economy forward alongside the railway. 

The first cars were in the early nineteenth century but the real discovery of the car goes back to the late eighteenth century when Joseph Nicholas Cuneo made the first powered car in 1769. 

Most definitions of the term specify that cars are designed to move on the roads processed (asphalt), and they seat up to seven people, usually moving on four wheels. 

History
Carl Benz invented the car with a gasoline engine in Germany in 1885. Benz patented this car on January 29, 1886 in the city of Mannheim. Thanks to Benz the modern invention of the car but other German engineers were working on building cars at the same time. In Stuttgart in 1886, Gottlieb Daimler and Wilhelm Maybach patented the first motorcycle, built and tested in 1885. In 1870 German inventor Siegfried Marcus built a motorized rickshaw but this vehicle did not exceed the pilot phase
Now there are new types of fuel for engines for cars to reduce dependence on petroleum-based fuel, and reduce the amount of harmful gases to the environment, and reduce the problem of global warming. Therefore car makers are working to create new types of fuel, and still their findings until now find ample room to improve performance and increase thermal efficiency.

New fuels require new technology and compatibility between the machine and fuel. This includes fuel supply and engine type, as well as the safety preparations.

Hydrogen-powered engines.
Hydrogen is high-octane fuel. However, hydrogen storage is one of the problems that need attention and solution. The hydrogen storage in the liquid state is necessary from the point of expanding distance range, but it is not likely if the car is stopped and not used for a long time, since the temperature has cooled liquid during the long stop cars lead to the lifting of the pressure in the hydrogen tank.

References

"Automobile - Wikipedia, the free encyclopedia." Wikipedia, the free encyclopedia. N.p., n.d. Web. 18 Nov. 2012. <http://en.wikipedia.org/wiki/Automobile>

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Tuesday, November 6, 2012

Houbara Bustards

The birds are endangered North African houbaras.
Their numbers have decreased in the past year, due to over-hunting and destraction of the dry grasslands where they live . Between opening in 1995 and last year the emirates Center for wild life propagation has produced more than 60,000 of the birds .
Chicks due for release are kept in wire cages covered with cloth , until they are just under nine months old , and they release six to 20 birds at 5km intervals , The success of the programme can be measured  though their density in the wild and by observing the number of nests.

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Reflection1


I started the class late and I didn’t even know how to do a summary
Mr. Hedley helped me make a summary and what I should write in the summary , what I should not write in the summary such as name’s and date’s . We made 4 summaries till now. They were about police horsemen patrols , desert survival , houbara bustards , and desert milk , With each summary I got better, and then Mr. Hedley showed us how to do a Reference by looking at Bibme.

In conclusion thanks to Mr. Hedley I learned in this course how to make a summary and make a reference and write reflections

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