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linhkiu755
2 năm trước
Hãy xác định điện năng tiêu thụ của tivi. Biết rằng sau khi mở tivi,quan sát đĩa công tơ thấy đĩa nhôm của công tơ quay được 2900 vòng. Biết hằng số của công tơ 900 vòng/ Kwh
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