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GUJARAT TECHNOLOGICAL UNIVERSITY, Prove that sphericity of sphere is unity 03 (b) , In a ball mill of diameter 2000 mm, 100 mm diameter steel balls are being used for grinding Presently, for the material being ground, the mill is run at 15 rpm At what speed will the mill have to be run if the 100 mm balls , Q5 (a) Explain minimum fluidization velocity 03 (b) ,

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