Water from a reservoir passes over a dam through a turbine and discharges from a 60-cm ID pipe at a point 40 m below the reservoir surface. The turbine delivers 1 MW. a. Draw the system and write the relevant form of the mechanical energy balance. b. Calculate the required flow rate of water in m3 /min if friction is neglected. (Note: The equation you will solve in this problem has multiple roots. Find a solution that is physically relevant.) c. If friction were included, would a higher or lower flow rate be required

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?

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false