4x2-ft gate is hinged at a and is held in position by rod cd. end d rests against a spring whose constant is 828 lb/ft. the spring is undeformed when the gate is vertical. assuming that the force exerted by rod cd on the gate remains horizontal, determine the minimum depth of water d for which the bottom b of the gate will move to the end of the cylindrical portion of the floor

On a average work day more than work place firs are reorted

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

On solidification from a melt, the polymer polyethylene forms a semi-crystalline spherulite structure. (i) sketch an individual spherulite and label the amorphous and crystalline regions. (ii) draw a schematic to show the changes in specific volume with temperature during cooling from the melt, comparing it to the theoretical extremes of fully crystalline and fully amorphous (indicate tm and tg)