本题目来源于试卷: gc textbook chapter 7 Linear Momentum，类别为 通用国际物理
[问答题]
At a hydroelectric p.y* v n-v-d ddy+whuo8ucd4f.yzh)w -ower plant, water is dirk6a8tu29l) isw1vc:vu s qc,pected at high speed against turbine blades on an axle that turns an electric generator. For maximumw8v, 9sca ivuqp:)cksl61ut2 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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