Engineering, 14.12.2021 14:00 itzia00
Cho sơ đồ chỉnh lưu thyristor ba pha, kiểu tia . Mach tải gồm điện trở R nối tiếp với điện cảm L. Nguồn điện áp xoay chiều có trị hiệu đụng điện áp pha U-220v/50Hz, R = 40, a = 80°. Hãy tính xem L phải bằng bao nhiêu để thiết bị chỉnh lưu làm việc trên ranh giới giữa dòng liên tục và dòng gián đoạn.
Answers: 3
Engineering, 03.07.2019 15:10
Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.
Answers: 1
Engineering, 04.07.2019 18:10
Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.
Answers: 2
Engineering, 04.07.2019 18:10
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
Answers: 1
Engineering, 04.07.2019 18:20
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.
Answers: 3
Cho sơ đồ chỉnh lưu thyristor ba pha, kiểu tia . Mach tải gồm điện trở R nối tiếp với điện cảm L. Ng...
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