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9th Class Science Work and energy Question Bank 9th CBSE Science Work and energy

  • question_answer
       How much time will a pump of 1 kW power takes to lift 500 kg of water to height of 40m? [g =10]   

    Answer:

             Here, m = 500 kg, h = 40 m, P = 1 kW = 1000 W, t = ? Now,   


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