Aconverging-diverging nozzle exits smoothly to sea-level standard atmosphere. it is supplied by a 65-m3 tank initially at 500 kpa and 100°c. assuming isentropic flowin the nozzle, estimate (a) the throat area and (b) the tank pressure after 10 s of operation. the exit area is 10 cm².

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.

What is creep? what is stress relaxation?