绕轴O转动的自动开启式水闸,当水位超过H=2 m时,闸门自动开启。若闸门另一侧的水位h=0.4 m,角α=60°,试求铰链的位置x为()https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/0738779e7135457994676fc94d1db3f8.png
举一反三
- 图示绕铰链 [tex=0.786x1.0]5SeCOJOzMwSNbX8MGx2Qsg==[/tex] 转动的倾角 [tex=2.857x1.071]z7opkeLRldjTaMX1PsKn0NKYP4nY39x0UQ624967pgs=[/tex]的自动开启式矩形闸门, 当闸门左侧水深[tex=3.643x1.214]Ixt3rw77/+hsLJxV8+YZig==[/tex], 右侧水深 [tex=4.429x1.214]VUKNtftlmVhiSiwSHinuFw==[/tex]时,闸门自动开启, 试求铰链至水闸下端的距离 [tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex] 。[img=341x184]17ad3d0098956e8.png[/img]
- 图示绕铰链 [tex=0.786x1.0]wDL9VikuQQw4+SVk5ZdprQ==[/tex] 转动的倾角 [tex=2.857x1.071]z7opkeLRldjTaMX1PsKn0NKYP4nY39x0UQ624967pgs=[/tex] 的自动开启式矩形闸门, 当闸门左侧水深 [tex=3.071x1.214]VVb60UfUdFj1BZwYG9wpLKrmA9ix9EVEtgwhSqX1yyQ=[/tex], 右侧水深 [tex=3.857x1.214]AFuNscC5HD0IY9HCnMxfquFjnwWdnfcY3zfRvRkSTxA=[/tex] 时, 闸门自动开启, 试求较链至水闸下端的距离 [tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex] 。[img=377x200]17a8dc0f149b2e6.png[/img]
- 图示矩形闸门,已知a及h,当()时,闸门可绕O轴自动打开。 A: B: C: D:
- 一洒水车以等加速度a=0.9807 m/s2在平地行驶,水车静止时,B点的位置为x=1.5 m,水深h=1 m,运动后该点的水静压强为()https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/a6d6a260dade47a98949dc5c8785e1a9.png
- 设D:全总个体域,F(x):x是病人,G(x):x是医生,H(x, y):x相信y。则命题“所有的病人都相信医生”的逻辑符号化为( ) A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/3bdf051eb63a487ebe8cee0b418e2422.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/bfae84737f674bd0b1d8ba7d206c1edf.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/d6d343e235594926aec9dbfcc9ef4b30.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/6d189695377347739a4c0478956d9248.png" />