Great Britain had large amounts of coal; however, there were not yet efficient means by which to produce mechanical energy or to power machinery.
英国有大量的煤；然而，当时还没有有效的方法来产生机械能或为机器提供动力。
Mechanical energy rules supreme, and that's dictating where equilibrium lies.
机械能占据主导地位，他决定了平衡的位置。
When you don't have to worry about criteria like that ordinary, mechanical energy rules supreme, and that's dictating where equilibrium lies.
如果你不担心像这样的要求,通常的机械能就占据主要地位，并且决定平衡位于何处。
When you don't have to worry about criteria like that ordinary, mechanical energy rules supreme, and that's dictating where equilibrium lies.
如果你不担心像这样的要求，通常的机械能就占据主要地位，并且决定平衡位于何处。
This is visualizing the process of the conversion of mechanical energy into chemical and electrical energy very nicely.
这一模拟恰到好处地演示了,机械能到化学能和电能的转换过程。
I believed in the conservation of mechanical energy and I overlooked the tension.
我相信，机械能守恒定理，我忽略了张力。
You see it on the general exams for physics, and it's simply a matter of conservation of mechanical energy.
你会在一般的，物理考试中见到，这只是一个，机械能的问题。
Okay, I start off, point A is at a distance h h above this level, and so I apply now the conservation of mechanical energy.
好的我开始了，点A距离这个平面,高度差，现在运用,机械能守恒定理。
There is mechanical energy, MGH comes out in the scoops, and what does he notice?
是有机械能，来自于勺子，他看到什么？
James Joules The physicist James Joules, after we we call after him the unit of work was the first to demonstrate that heat energy and mechanical energy are really equivalent.
物理学家，我们以他命名功的单位,他是第一个演示出,热能和机械能相等的人。
And therefore almost every mountaineer has with him or her a device which converts mechanical energy into electricity.
因此几乎所有登山者，都会携带一种，能把机械能转化为电的装置。
Kinetic energy can be converted back to potential energy, can be converted back, - but the sum of them — which we call "mechanical energy" — is conserved.
动能可以转化，成为势能，也可以转化为动能，但是总和-，我们叫做的，机械能，是恒定的。
I was so convinced that the conservation of mechanical energy was going to work - that I almost killed myself — - not quite — with this huge, 15?
我坚信，机械能守恒定理，会起作用，我几乎杀了自己-，近乎杀了自己-，那个球大概15公斤？
We have already seen a demonstration in class whereby we converted mechanical energy when someone was rotating, into electric energy.
课堂上我们已经看到,怎样在物体旋转时,将机械能,转化成电能的，演示例子。
So they convert mechanical energy of rotation to magnetic energy, 1 which is not part of 801 so I will not go into how they do that.
它们将旋转的机械能，转化成磁能，这不是801的部分1，所以我不会讲怎么做。
We were able to apply the conservation of mechanical energy because spring forces are conservative forces.
我们也可以运用，机械能守恒，因为弹力，是恒力。
I used first the conservation - of mechanical energy — there was no friction — and then I showed you that it's completely consistent with the work-energy theorem, so what would you do now?
首先，我用了机械能，守恒定律-，这里没有摩擦力-，我会向你们展示，这，和功能定理完全一致，现在你会怎么做呢？
Then we have the conservation - of mechanical energy — the sum of kinetic energy and potential energy.
我们知道，机械能守恒定律-，动能和，势能的总和。
The big disadvantage of free-standing turbines is that they are less efficient in transforming the mechanical energy of water into electrical energy than turbines in dams are.
独立式涡轮的最大缺点是他们将机械能转化为电能的效率低于大坝内安装的涡轮。
This is part of 802, and I'm sure all of you are looking forward to 802, and that's when you will see how you can convert mechanical energy into magnetic energy.
这是802的部分，我很肯定你们都，很向往802章，那时候你们就能看到，怎样把机械能，转化成磁能。
And so you could have used the work-energy theorem or you can use the conservation of mechanical energy.
所以你也可以用，功能定理，或者是机械能，守恒定律。
Nuclear energy can be converted into heat, and that can be converted into mechanical energy and again into electricity.
核能也可以转化为热量，能转化为机械能，再转成电力。
When people open or close a door, the door produces mechanical energy that could be turned into electric energy.
人们开关门时，门所产生的机械能可转化成为电能。
Now, I am such a strong believer of the conservation of mechanical energy that I am willing to put my life on the line.
现在，我很相信，机械能守恒，我愿意把我的生命，放到这条线上。
5 times the radius, conservation of mechanical energy tells you that that is the minimum it takes to just go through that point.
5倍于半径的高度，机械能守恒定理，告诉我们照着书，要经过这点的最小值。
In the dynamo, mechanical energy is used for rotating the armature in the field.
在直流发电机中机械能用来使电枢在磁场中转动。
A generator can not produce energy, what it does is to convert mechanical energy into electrical energy.
发电机不能产生能量，它只是把机械能变为电能。？(省译“它所做的事”)。
For any given portion of air, the greater expansion ratio allows more energy to be converted from heat to useful mechanical energy meaning the engine is more efficient.
对于任何给定的空气部分，更强大的扩展比允许更多的精力从热量转换为有用的机械能，这意味着发动机效率更高。
For any given portion of air, the greater expansion ratio allows more energy to be converted from heat to useful mechanical energy meaning the engine is more efficient.
对于任何给定的空气部分，更强大的扩展比允许更多的精力从热量转换为有用的机械能，这意味着发动机效率更高。
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