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Physics

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Một bếp điện 220V - 1000W mỗi sử dụng 30 phút
a, cần mặc vào bếp một hiệu điện thế là bao nhiêu để bếp hoạt động bình thường
b, nếu giá điện sử dụng là 1750 đồng 1kw/h , tính tiền điện trong 1 tháng
c, tính nhiên liệu mà bếp tỏa ra trong 15 giây

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