A coil of 500 turns and resistance 20 ohm is wound uniformly on an iron ring of mean circumference 50 cm and area of cross-section 4 cm2 . It is connected to a 24V DC supply. Under these conditions, the relative permeability of iron is
800. Calculate
(a) MMF of the coil,
(b) magnetizing force,
(c) total flux in the iron and (d) reluctance of the ring.​

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet