Aship 90 meters long is floating on an even keel at 6 m draft. the half-ordinates, commencing from forward, are as follows: 0, 4.88, 6.71, 7.31, 7.01, 6.40, and 0.9 m respectively. the half-ordinates 7.5 meters from bow and stern are 2.13 and 3.35 m respectively. the change in draft if 153 tonnes of cargo are loaded with its center of gravity vertically over the center of flotation. find the water plane area (wpa); and lcf from the aft perpendicular.

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?

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.