Which of the following is not an example of an entrepreneur? a. madeline runs a neighborhood lemonade stand by herself. b. cindy has a yard sale once a year. c. diane molberg started by request, a successful home bakery business that guarantees that any item it sells is no more than 24 hours old. d. donna cook wanted to start a little home business 10 years ago; now she has a company that produces and markets more than 150 dry cooking mixes. e. elmer olsen created the successful bayfield apple jam company using a recipe from his wife and some investment capital.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.