半圆形闸门半径为R(米),将其垂直放入水中,且直径与水面齐,设水密度p=1。若坐标原点取在圆心,x轴正向朝下,则闸门所受压力P为( )。 A. B. ...

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问题 半圆形闸门半径为R(米),将其垂直放入水中,且直径与水面齐,设水密度p=1。若坐标原点取在圆心,x轴正向朝下,则闸门所受压力P为( )。 A. B. C. D.
选项
答案 C
解析

相关内容:半圆形,闸门,半径,放入,水中,直径,水面,密度,坐标,原点,圆心,压力

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