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• A dynamo transforms mechanical energy into electricity.

发电机使机械能转换

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• We didn't even talk about it when we did the conservation of mechanical energy.

我们甚至没有,我们运用机械能,守恒定理时候

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• There must be something fundamentally wrong with the conservation of mechanical energy.

肯定什么,基础性错误,这个机械能守恒定理

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• And mechanical energy is only conserved if the force is a conservative force.

机械能只有,恒定时恒定

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• So this is the conservation of mechanical energy.

因此,机械能守恒

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• Let's try the conservation of mechanical energy.

我们机械能守恒定律解答一下。

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• I turn to equation number five, which is the conservation of mechanical energy.

方程式就是机械能,守恒定律

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• In both cases, mechanical energy results.

情况中，机械能起的作用

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• I trust the conservation of mechanical energy 100%.

百分百相信,机械能守恒

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• LEWIN Shall we try the conservation of mechanical energy Is there anything wrong with that?

大声点。，LEWIN：，So，speak，up。,我们可以尝试机械能守恒定律吗？,这样什么问题吗？

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• When bent, a piezoelectric material turns that mechanical energy into electricity.

这种材料被挤压而发生弯曲压电材料就能够挤压机械能转化电能

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• That is what we need when we apply the conservation of mechanical energy.

我们运用,机械能守恒定理,需要

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• So with this in mind, I feel comfortable to pursue my conservation of mechanical energy.

记住这个我们能够很放心地,使用机械能守恒定理

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• We believe in the conservation of mechanical energy.

我们相信,机械能守恒定理

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• It follows immediately from the conservation of mechanical energy.

紧跟着,机械能,守恒定理产生

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• Mechanical energy is conserved, because gravity is a conservative force.

机械能守恒的，因为重力守恒

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• We only used the concept of mechanical energy, which is conserved.

仅仅利用机械能概念,守恒

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• Now I want to return to the conservation of mechanical energy.

现在回到,机械能守恒

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• I'm going to write down the conservation of total energy, mechanical energy.

写下整体,能量守恒机械能

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• So, a small increase in wind speed can lead to a big increase in the amount of mechanical energy you can harvest.

所以风速微小增加导致获得机械能大幅增加

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• We have also the conservation of mechanical energy.

还是机械能,守恒

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• And so the total mechanical energy is conserved.

所以机械能,守恒

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• mgh A waterfall is mechanical energy, mgh.

瀑布机械能

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• mechanical energy.

机械能守恒。

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• Thee change of electrical energy into mechanical energy is done in motors.

电能变为机械能通过电动机实现的。 。

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• One that uses light instead of mechanical energy.

激光器采用而不是机械能

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• Notice that not all mechanical energy is kinetic energy.

要注意并非所有机械能都是动能

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• The mechanical energy can be changed back into electrical energy by a generator.

利用发电机可以机械能再度电能

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• The mechanical energy can be turned into electrical one by a generator.

利用发电机可以机械能转变电能

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• The mechanical energy can be turned into electrical one by a generator.

利用发电机可以机械能转变电能

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