Cho mạch điện có: R1 = 20 Ohm; R2=R3 = 10 Ohm f = 60 Hz; L1 = L2 = 0,3 H; L3 = 0,1 H; C1=C2=C3 = 0,01 F
Tính giá trị các tổng trở Z1, Z2, Z3

Abarometer contains mercury with a density of 13600 kg/m3. atmospheric conditions are 95.8 kpa and 20 °c at 20 °c, the vapor pressure of the mercury is 0.000173 kpa. the column of mercury will rise to a height of most nearly. select one: a)- 0.38 m b)- 0.82 m c)- 0.48 m d)- 0.72 m