The Very Beginnings of the engine

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Domanda English Risposta English
Give two examples of simple prehistoric machines
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the club, the oar
What kind of power did this machines use?
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human, animal, water, wind, steam
How was the power in these machines transformed?
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With the forces multiplied and the speed reduced
What were gears(toothed wheels) used for?
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to regulate the speed of rotation
what is a crank?
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A crank is a device for changing reciprocating motion into rotary motion or vice versa
What is transportation?
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Transportation is a physical movement or flow of goood
What mode of transport is a cheapest
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water
what mode of transport is the most expensive and fastest
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air
What type of products are water-based modes of transport used for?
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commodity type products, such as grain, coal, and ore
What is ICA?*
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the Interstate Commerce Act
What is intermodal transport
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transport that uses more that one mode of transportation
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