Một mạch điện 3 pha đố xứng Ud =380[V], cung cấp điện cho hai
tải đối xứng: tải 1 tiêu thụ P1
=6[kW], Q1
=4[kVAr]. Tải 2 tiêu thụ
P2
=8[kW], Q2
=2[kVAr]
a. Tính dòng điện dây của mỗi tải.
b. Hãy xác định dòng điện dây Id
của nguồn cung cấp cho hai tải trên.

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm(red) and 486 nm (blue). light from a hydrogen lamp illuminates a diffraction grating with 520lines/mm , and the light is observed on a screen 1.5m behind the grating. part a what is the distance between the first-order red and blue fringes? express your answer to two significant figures and include the appropriate units.

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