Question 14 (4 points) You are planning to buy a new couch for your family room. Before you leave for the furniture store, you measure the available space and
conclude that the couch should be between 5' 10" and 6' 8" long. At the strore you find a couch that you like but it is sectional and comes in
two parts. The specification sheet on the couch indicates that the couch is 65 inches long and the chaise is 36 inches wide. What is the total
length of the couch in feet and inches?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

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?