Given four int variables that have been given values, octet1, octet2, octet3, and octet4, write a string expression whose value is the string equivalent of each these variables joined by a single period so if octet1, octet2, octet3, and octet4, had the values 129, 42, 26, and 212 the expression's value would be "129.42.26.212". alternatively, if octet1, octet2, octet3, and octet4, had the values 192, 168, 1and 44 the expression's value would be "192.168.1.44".

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?

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux