12. 2. challenge query operators a sql-1-4.sql file has been created and opened for you. write the following sql statement: select all the records from the basic_info table where birthdays are less or equal to 2016 get the records only if the id is between 1 and 5 order by id in a descending order

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

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)