某离心泵当转速为2900r/min时，功率为7kW，若转速提高一倍，则功率为（）kW。_仪表维修工高级技师_全学科试题题库

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某离心泵当转速为2900r/min时，功率为7kW，若转速提高一倍，则功率为（）kW。
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