Air at a temperature of 27.0°C (P = 1.00 atm) and a velocity of 12.7 m/sec flows over the top of a flat mold in order to cool it down (assume this is a flat plate). The mold has dimensions of 1.50 m wide by 0.450 m long (the 0.450 meters dimension is in the direction of the air flow); and is at a temperature of 127.0°C. a) Find the heat transfer rate from the mold to the air (q). b) Calculate the drag force on the mold due to the air flow.

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

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?