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[" A fan is making "600" rev/min.If it m...

[" A fan is making "600" rev/min.If it makes "1200" rev/min,what is the increase in its "],[" angular velocity? "],[[" (A) "10 pi rads^(-1)," (B) "20 pi rads^(-1)," (C) "60 pi" rads "^(-1)," (D) "40 pi" rads "^(-1)]]

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