What pounds per square inch is required by a bubbler system to produce bubbles at a depth of 4 ft 7 in water?

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)

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above

How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s