What are constraints? 1 po
What are the requirements of the design? What features does it need to have, how will
it behave?
What is the design supposed to do? For example, transmit a current, measure
temperature or switch on a light. Designers will categorize them into primary and
secondary functions.
How does the design accomplish the desired function?
What are the limitations or restrictions on the design? Constraints take into
consideration factors including safety, standardization, client/customer requirements,
cost and market.
O I don't know but I do know I like 7-11.
Other:

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.