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 ?

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.

When solid surfaces slide over each other the kind of friction that occurs is called friction