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I need help with part b

thank you in advance
In a region of free space, the electric field at an instant of time is E [(-60.0)i + (75.0)j + (30.0JK] N/C, and the magnetic
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-60.07 + 15.0] + 300k N/ B 0.143 1 + 0.100] +0.040 P PT Poynting Vector 3 - I (EXB) Mo O om a i k os V Ez - 60 75 30 Ex Ey Bo

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