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thientri1286
2 năm trước
Câu 6: Dùng máy bơm để bơm 4 m3 nước lên cao 10m. biết d nước= 10000 a. Tính trọng lượng nước cần bơm. b. Tính công cần thiết để bơm lượng nước trên ( công tối thiểu). c. Nếu hiệu suất máy bơm là 80% thì công máy bơm đã thực hiện là bao nhiêu? d. Biết công suất máy bơm là 7,5 kW. Tính thời gian bơm?
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