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PROFESSOR BAWENDI: The only But it's hard to imagine an irreversible compression the way we can just imagine an irreversible expansion.
,但是我们很难,像描述不可逆膨胀一样,来描述不可逆压缩。
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I suppose to a lesser literacy skill of being a good listener or viewer and have information push condensed.
假设一名优秀的聆听者,或观众需要较少的文化素养,我会将信息压缩。
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So the force that you're pushing down on here is the external pressure times the area.
或者压缩功的概念,在活塞上施加压力。
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In fact, this example would compile because you can use curly braces in this way to encapsulate lines of code, but realize for now, that, not good.
实际上，这个例子可以编译,因为你可以用这种方式来压缩代码行,但是请认识到，那个，不太好。
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If you connect the body to a spring, which is neither compressed nor extended, there's no force acting on it.
如果将一个弹簧连在这个物体上,弹簧既没有被压缩也没有被拉伸,也不会有力作用在它上面
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If, in fact, a gold nucleus was this size here, we would need to use another lecture hall in order to find a place to put this nucleus right here.
那么这个实验就太诡异了，所以我们决定,把距离压缩一下，我们要考虑到这一点。
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It's a wonderfully compressed argument in which the Soul and the Heart make competing claims for Christianity and classical and literary wisdom.
这里压缩的争论很精彩,其中心和灵魂关于基督教义和,古典的文学的智慧提出相对立的主张。
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A cellist is always shortening and lengthening the strings.
大提琴演奏家总是在压缩或拉长弦
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All right, so you're saying it compresses the range.
你说的意思是压缩范围
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These molecules of DNA, very long molecules of DNA, are condensed and packaged within the nucleus of every cell in your body.
这些DNA分子是非常长的,它们通过折叠等方式压缩形成染色体后,被装配在你身体内的每一个细胞内
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We transition to actually real world applications later on like a compression-- how do you take a huge amount of data ; and actually whittle it down into something more manageable; something that uses less of your disk space.
然后我们会讲生活中的应用程序,比方说压缩文件——,把大量的数据分解使其更易管理;,并占用尽量少的磁盘空间。
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So I've got, this piston here is compressed, and I slowly, slowly increase the volume, drop the temperature.
这样，这个活塞就被压缩了，然后我再很慢很慢地增加它的体积，降低温度。
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You've just done an adiabatic compression of the ideal gas, you can pretend there is an ideal gas.
这就是对理想气体的,绝热压缩，---我们把空气近似作为理想气体处理。
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And you can find these compressibility factors in tables. If you want to know the compressibility factors for water, for steam, at a certain pressure and temperature, you go to a table and you find it.
各种气体的压缩系数,想知道水或者水蒸气,在某个温度和压强下的，压缩系数，查表就行了，这是实际气体状态方程的。
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It's something that someone else wrote or maybe you wrote, but you can encapsulate all of your ideas or your functionality inside this thing called a function.
它是别人或你自己写的，但是你可以压缩你所有的想法,或者你这个东西里面的功能叫做一个函数。
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The spring is getting squashed because you are pushing down and the floor is pushing up.
弹簧现在被压缩了,因为你在往下压,地面在往上推
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If it's positive, it means you've stretched it, if it's negative, it means compressed.
如果它为正值,就说明弹簧被拉伸了,如果它为负值,就说明弹簧被压缩了
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You do it so quickly that the heat flow between the inside of the bicycle pump and the outside is too slow compared to the speed at which you compress.
我们用力很大,于是压缩得很快,打气筒内外热传递的速度,与之相比要慢得多。
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There's p1 here, and p2 here So I'm starting at p1, V1. I'm starting right here And I'm going to end right here.
它的分子间作用力很小,十分接近理想气体,对它做一个压缩过程。
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You're taking the air inside of the pump and you're compressing it. You're doing it so fast that there's not enough time for heat to come out of the gas that's inside the pump towards the walls of the pump.
你把空气吸进气筒里并且压缩它,你的动作很快以至于,没有足够的时间让热量,从气筒里面跑出来,传递到气筒壁上。
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Our constraint is going to be an adiabatic expansion or compression.
现在约束改成了,绝热膨胀，或者压缩。
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The first one uses something called Z a compressibility factor, z.
下面我们就来看几个例子,第一种办法是引入压缩系数。
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So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.
也就是当活塞,压缩气体的时候，做的功是正的，按照这一规定,我们需要在这里，加上一个负号，这是习惯规定。
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A compression is a little bit more complicated.
压缩要复杂一些。
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I'm not sure it does compress the range.
但是我不太确定这是否压缩了范围
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Remember it's the external pressure that's important. In this case, because it's a reversible process, the external pressure turns out to be always the same as the internal pressure.
是过程非常缓慢,比如我把体积，从V1压缩到V2时，我做得十分缓慢,在过程中的任何一点。
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In the opposite case, if you have a compression, then it's the opposite of expansion.
绝热压缩，的情况，与此相反。
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You have to do it awfully fast to get your irreversible compression.
我们要压缩得非常快,才能实现不可逆压缩。
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Then we're going to have another isothermal step, a compression to some point four.
然后有另外一个绝热过程，绝热压缩到4点。
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Your compressing it really fast, all right, so you're changing the pressure.
你把它压缩的非常快，好的，那么你改变了压力。
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