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a-pointer" target="_blank"> (2024高一下·許昌期末) </a> 科技廣場噴泉噴出水柱的場景如圖所示。已知噴泉噴出的豎直水柱高度為h，噴管的直徑為d，重力加速度大小為g，水的密度為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi%3E%CF%81%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，假設(shè)給噴泉噴水的電動機的能量全部用來轉(zhuǎn)化為水的動能，不計空氣阻力，則給噴泉噴水的電動機的輸出功率（　?。?p style="text-align:left;"><img src="http://tikupic.21cnjy.com/ct20241o/93/cd/93cd36476f89317a9e70ee8ac2df0ac8.png" width="105" height="109" style="max-width:100%;"></p> </h1> <div id="vr9fmb4" class="exam-s"> <span id="jjqutos" class="op-item"><span id="4h9q9j9" class="op-item-nut">A . </span><span id="q9ju4v4" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfrac%3E%3Cmrow%3E%3Cmi%3E%CF%81%3C%2Fmi%3E%3Cmi%3E%CF%80%3C%2Fmi%3E%3Cmsup%3E%3Cmi%3Ed%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmi%3Eg%3C%2Fmi%3E%3Cmi%3Eh%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmn%3E4%3C%2Fmn%3E%3C%2Fmfrac%3E%3Cmsqrt%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmi%3Eg%3C%2Fmi%3E%3Cmi%3Eh%3C%2Fmi%3E%3C%2Fmrow%3E%3C%2Fmsqrt%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="4l4qoc4" class="op-item"><span id="ihkabbx" class="op-item-nut">B . </span><span id="cq8z984" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfrac%3E%3Cmrow%3E%3Cmi%3E%CF%81%3C%2Fmi%3E%3Cmi%3E%CF%80%3C%2Fmi%3E%3Cmi%3Ed%3C%2Fmi%3E%3Cmi%3Eg%3C%2Fmi%3E%3Cmi%3Eh%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmn%3E4%3C%2Fmn%3E%3C%2Fmfrac%3E%3Cmsqrt%3E%3Cmrow%3E%3Cmfrac%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmi%3Eg%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmi%3Eh%3C%2Fmi%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmsqrt%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="s4aftcv" class="op-item"><span id="a4j4pjq" class="op-item-nut">C . </span><span id="wygjvco" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfrac%3E%3Cmrow%3E%3Cmi%3E%CF%81%3C%2Fmi%3E%3Cmi%3E%CF%80%3C%2Fmi%3E%3Cmsup%3E%3Cmi%3Ed%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmsup%3E%3Cmi%3Eg%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmsup%3E%3Cmi%3Eh%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmsup%3E%3C%2Fmrow%3E%3Cmn%3E4%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="ntybyur" class="op-item"><span id="ouu9iaq" class="op-item-nut">D . </span><span id="n4c4agr" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfrac%3E%3Cmrow%3E%3Cmi%3E%CF%81%3C%2Fmi%3E%3Cmi%3E%CF%80%3C%2Fmi%3E%3Cmsup%3E%3Cmi%3Ed%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmsup%3E%3Cmi%3Eg%3C%2Fmi%3E%3Cmi%3Eh%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmfrac%3E%3Cmsqrt%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmi%3Eg%3C%2Fmi%3E%3Cmi%3Eh%3C%2Fmi%3E%3C%2Fmrow%3E%3C%2Fmsqrt%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="r9hs4m4" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="l4j9ky8" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=57909337" width="140px" height="140px" alt=""> <p style="text-align:center;margin-top: 10px">微信掃碼預覽、分享更方便</p> </div> <div 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