60 résultats pour "motores"

• Lärmbelästigung - geographie.

  Die modernsten Hochgeschwindigkeitszüge wurden so entworfen, dass sie - trotz zum Teil wesentlich höherer Geschwindigkeiten - nicht lauter als ältere Züge sind. Dieneuen Streckenverläufe mussten sorgfältig geplant werden, und Lärmschutzvorkehrungen wurden eingeführt, um den Umweltnormen zu entsprechen. 5.3 Flugverkehr Nach dem 2. Weltkrieg wuchsen die Bedenken über den Fluglärm rapide an. Gegen Mitte der sechziger Jahre waren sie so stark angestiegen, dass Luftfahrtbehörden undFlugzeugherstelle...

• Koala - biology.

  V REPRODUCTION Female koalas become sexually mature around 18 to 24 months of age. They can produce one offspring a year until they reach about 13 years of age. Males begin toproduce sperm around age 2 and, in the absence of older, stronger males, they may breed at that young age. More often, however, a male must grow big enough tocompete with other males for females, and mating generally begins for males at about 4 years of age. The breeding season for koalas is from October to May, during the...

• Poliomyelitis.

  Physical therapy helps patients with paralytic polio stretch and move affected muscles. This movement minimizes the atrophy, or shrinkage, of affected muscles andlimbs and builds strength. Exercises can also retrain working muscles to compensate for other muscles that have permanently lost the ability to move. Rehabilitativetherapy trains patients to use braces, crutches, and other devices that provide support and aid mobility. V PREVENTION OF POLIO Immunization with polio vaccine is the best w...

• Acid Rain.

  the Adirondack Mountains of New York State, a quarter of the lakes and ponds are acidic, and many have lost their brook trout and other fish. In the middleAppalachian Mountains, over 1,300 streams are afflicted. All of Norway’s major rivers have been damaged by acid rain, severely reducing salmon and trout populations. E Plants and Animals The effects of acid rain on wildlife can be far-reaching. If a population of one plant or animal is adversely affected by acid rain, animals that feed on tha...

• Submarine.

  B Propulsion Modern submarines use either diesel-electric or nuclear power to drive the sub's propeller and to provide internal electric power. Diesel-electric power emerged as themost efficient propulsion system for submarines in the early 20th century, following unsuccessful attempts to use steam or gasoline power. While on the surface, thesubmarine uses a diesel engine to drive the propeller and generate electricity. When submerged, a battery-driven electrical motor takes over for propulsion...

• Madrid - geography.

  stores and offices on the first one or two levels. While many people rent their apartments, most own them and participate in cooperatives that maintain the building.Because living spaces are small by American standards, madrileños do most of their socializing in the streets, bars, restaurants, and parks of their neighborhoods. Onlya few very wealthy areas north of the city have single family houses with gardens and yards similar to those in American suburbs. Many of the newest neighborhoodsare c...

• Michigan - geography.

  The interior location of Michigan in the northern part of North America results in a continental climate, characterized by four definite seasons with moist, mild to hotsummers and snowy, cold winters. Winds off of Lakes Michigan and Superior in winter create heavy snow accumulations in nearby areas. The tempering effects of LakeMichigan account for the presence of the state’s famous fruit-growing belt along the lake’s shore. Since the water is colder than the land in spring, the westerly windspa...

• Michigan - USA History.

  The interior location of Michigan in the northern part of North America results in a continental climate, characterized by four definite seasons with moist, mild to hotsummers and snowy, cold winters. Winds off of Lakes Michigan and Superior in winter create heavy snow accumulations in nearby areas. The tempering effects of LakeMichigan account for the presence of the state’s famous fruit-growing belt along the lake’s shore. Since the water is colder than the land in spring, the westerly windspa...

• Communism.

  In Britain, Robert Owen, a philanthropic Welsh manufacturer, strove against the social problems brought about by the Industrial Revolution and sought to improve thewelfare of workers. As manager of a cotton mill, he enhanced the environment of his workers by improving their housing, modernizing mill equipment for greater safetyand sanitation, and establishing low-priced stores for the workers and schools for their children. Owen believed that workers, rather than governments, should createthe in...

• Communism .

  In Britain, Robert Owen, a philanthropic Welsh manufacturer, strove against the social problems brought about by the Industrial Revolution and sought to improve thewelfare of workers. As manager of a cotton mill, he enhanced the environment of his workers by improving their housing, modernizing mill equipment for greater safetyand sanitation, and establishing low-priced stores for the workers and schools for their children. Owen believed that workers, rather than governments, should createthe in...