Cho sơ đồ chỉnh lưu hình tia 3 pha làm việc ở chế độ nghịch lưu phụ thuộc như hình 2-07-C2. Biết
ua=220
2
sin100t(V), ub=220
2
sin(100t-2/3)(V),
uc= 220
2
sin(100t+2/3)(V), La=1mH, E =-200V,
R = 2, L = ,  = 2
0
, Id = 27,2A. Hãy:
a) Xác định góc điều khiển .
b) Vẽ dạng sóng điện áp trên tải u’d.

What structural formula represents 4 electrons shared between two atoms?

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.

Aheat engine that operates on a carnot cycle has an efficiency of 0.420 when its low-temperature reservoir is at 10 ∘c.part aby how many degrees celsius must you increase the temperature of the high-temperature reservoir to increase the efficiency to 0.600 if you continue to use the same low-temperature reservoir?