Hot air enters a rectangular duct (20-cm-wide, 25-cm-high, and 5-m-long) at 100 kPa and 60 o C at an average velocity of 5 m/s. While air flows through the duct, it gets cool down (loses energy) so that air leaves the duct at 54 o C. Determine the rate of heat loss from the air under steady condition.

Difference Between Series and Parallel Circuits. The major difference is that the series circuits have the same amount of current flow through all the components placed in it. ... On the other hand, in parallel circuits, the components are placed in parallel with each other. This circuit splits the current flow.