say you have to fell a tree that is 22 inches in diameter. How many inches in should you make the horizontal face (1) cut if you follow the rule of going in a 1/4 of the diameter of the tree?

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)