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какое давление на прессуемое тело,если поршень имеет площадь 40м в квадрате и давит с силой 1600Н?
Ответы 1
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Давление для твердых тел имеет формулу: P=F/S где F - сила с которой тело давит на поверхность, S - площадь поверхности, на которую давят.P=F/S=1600/40•40=1 Па
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Автор:
zain - 6 лет назад
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Полные ответы По тексту Чикаго Chicago.
Chicago is the centre of the Midwest and a typical American city.
It is situated on. Lake Michigan. Waterways (and later railroad lines) have made Chicago a natural link between the products of the Midwest and the markets of the East. For a long time now Chicago has been an important centre of meatpacking and grain storage/There are also many factories in Chicago which produce farm equipment. Chicago has played a great role in the growth of the Midwest and of the United States. The population of Chicago has also grown rapidly. In 1850 its population was 50 thousand people. Now it is one of the most populated cities in the United States.
In 1871 there was a great fire, which destroyed nearly the whole of Chicago. The city needed rebuilding. The skyscraper — a typical feature of America — appeared in the course of this rebuilding.
In the 1880's and 1890's Chicago attracted engineers and architects from America and Europe. These men are now known as the Chicago school. In later years, the traditions which they began have been developed by others who worked in Chicago and other places.
Like New York, Chicago is a city of skyscrapers. Chicago's tallest buildings are the John Hancock1 Tower (or "Big John", as they call it), the Standard Oil Building ("Big Stan") and the Sears Tower2, which is the tallest building in the world.
Although Chicago is situated far away from any ocean, it is famous for its beaches. Most of the area along Lake Michigan is taken up by beaches and parks.
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1.were is Chicago situated?
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4.What is the Chicago school of architects?
5.Which are the tallest buildings in Chicago?
6.What is Chicago famous for in spite of its being situated far from any ocean ? Where are the beaches?
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