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nguyetmama2002
2 năm trước
1 máy bơm hút dầu mỏ từ độ sâu 400m lên với lưu lượng là 1000 lít trong 1 phút a, tính công bơm thực hiện được trong 1h cho biết trọng lương riêng của dầu là d = 8000N/m3.Bỏ qua ma sát c,tính công xuất máy bơm
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