Cho động cơ một chiều kích thích song song: 9,36hp; 500v; 17,1A. Tcs độ định mức 1750 vòng/ phút, điện trở quấn dây kích thích 576 ohm, nội trở phần ứng là 1,48 omh. Tốc độ không tải lý tưởng của động cơ?

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges