does anyone know why my pet lorax has vietnam flashbacks, it keeps saying i am the lorax i speek for the trees but for some reason their speaking vietnamese, if somebody messes with my trees, watch out i will break your knees.

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?