本题目来源于试卷: gc textbook chapter 7 Linear Momentum，类别为 IB物理学
[问答题]
At a hydroelectric p/8zpx y e rb)r/e: fbf;9gxh:t0s/zcm owerxcfl*hl x h(n7: l:2jq plant, water is directed at high speed against turbine b:chhlljln:7 *fx2( q xlades on an axle that turns an electric generator. For maximum power generation, should the turbine blades be designed so that the water is brought to a dead stop, or so that the water rebounds?
参考答案:
The turbine blades should be designed so that
the water rebounds. If the water
rebounds, that means that a larger momentum change for the water has occurred
than if it just came to a stop. And if
there is a larger momentum change for the water, there will also be a larger
momentum change for the blades, making them spin faster.
本题详细解析:
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