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

The Very Beginnings of the engine