E ship is subjected to a drag forceFDon its hull, created by waterpassing over and around its surface. This drag force is a function of properties of water (i. e.,densityand viscosity), characteristic length of the shipL, velocity of the shipV, and nally, since waves are produced, the weight of waves de ned by gravityg. Formulate this ow usingdimensional analysis [25 poi

Fluids at rest possess no flow energy. a)- true b)- false

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature