Air at 3 104 kg/s and 27 c enters a rectangular duct that is 1m long and 4mm 16 mm on a side. a uniform heat flux of 600 w/m2 is imposed on the duct surface. what is the temperature of the air and of the duct surface at the outlet?

Efficiency is an action of doing something. for example when you take a test. good efficiency means you did well but bad effeciency or no effiency means you did bad.

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.

Iknow the first part it is the average star i am not 100% sure

Need more information like a picture