Cho ĐMđl có: Pđm=16 Kw, U=220 V, Iđm=70 A, n=1000 vòng/phút ,Xác định ω khi Mc=0,6 , Mđm và Rưi=0,52 Ω ; Rư=0,28 Ω

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?