Question

简要回答有关水电站的下列问题：
(1)从能量转化的角度说明水电站的工作原理：                                                                         ．
(2)建设水电站选址时，从能量利用角度来看，你将选择图甲所示A址还是选择图乙所示B址?                                        ．其理由是                                                                                 ．
(3)水坝的横截面建成上小下大的梯形，
其理由是                                                                                                                                   ．

甲                                              乙

Answer 1

(1)水的机械能转化为电能   
(2)B址；B处距上水库水面的落差大，水具有的机械能大．    
(3)水的压强随深度的增加而增大上小下大的梯形．