Create a statement trigger called "bt_maj_adv_trigger" that would be work with both advisor as well as major table. If a record is inserted, deleted or updated in either of the table, the system will insert the user name, table name, date, and the dml command executed on the table. To insert this information, create an appropriate "log_maj_adv" table first before you create the trigger.

Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 atm and 25°c. the air moves at 5 m/s in cross flow over the tubes. each tube is 1 m long and has an outside diameter of 10 mm. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?