Suppose a railroad rail is 2 kilometers and it expands on a hot day by 20 centimeters in length. approximately how many meters would the center of the rail rise above the ground?

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.

it made them more prductive and efficent but with the change of polcies less and les got into the navy