Water is drawn steadily by a pump at a volumetric flow rate of 0.8 m/min through a pipe with a 10 cm diameter inlet. the water is delivered to a tank placed at a height of 10 m above the pipe inlet. the water exits through a nozzle having a diameter of 2.5 cm. water enters at 25°c and 1 atm pressure but there is no significant change in pressure and temperature at exit. six percent of the power input to the pump is dissipated in the form of heat into the surroundings. take the value of acceleration due to gravity (g) equal to 9.8 m/s determine (a) the velocity of the water at the inlet and exit and (b) the power required by the pump.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

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?

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.