Q (2) Mohammed and Ali drive from Baqubah to Hillah with total displacement of 135.7 km (32.1° north of east) which takes 1.5 h. Then they drive 51.9 km (25.9° south of east) to Najaf for one hour. (a) Find the average velocity for the entire trip. (b) Find the average speed for the entire trip. Answer (a) (v=67.6 km/h²,0 = 17° north of east) Answer (b) average speed =75 km/h.

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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.