Câu 2 (5 điểm): Cho một MBA 1 pha có các số liệu sau đây: Sam = 8000 KVA: Um ,=35/10 KV; điện áp ngắn mạch i%=4,9; tổn hao không tải Po = 27000W. Giả thiết U₂dm I-I;x=x. Tính R0,X0,Z0 ?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)