-
So energy expert Eric Potter says it is too early to know how the new gas shale reserves will affect the market.
VOA: special.2009.10.23
-
Now, your temptation is to keep the first answer because you know energy is not going to be negative.
你肯定想保留正根,因为你知道能量不会是负值
-
so he came back with the whole new aspect to the game, whole, you know, renewed energy.
所以他回来带给比赛崭新的一面，你知道，整个全新的能量。
-
And I know energy is related to Cv through Cv dT etcetera.
我们可以计算,这两个过程中的能量差。
-
And, if you ever get confused, the way to remember these is that you know energy is the integral of a force moving through a distance.
如果你感到很困惑的话，可以这么来记,能量是在沿力的方向进行路径积分。
-
The second piece of information we need to know is what actually the kinetic energy is of the ejected electron, and that's something we can just measure by measuring its velocity.
其次，我们需要知道的信息是,出射电子的动能，这可以通过,测量它们的速度得到。
-
I mentioned previously that we do not know a lot about how the mechanical stimulation is being converted into chemical and electrical energy.
先前我曾说过,对于机械刺激到化学和电能的转换,我们还知之甚少。
-
I was just going to--I don't know if this is one of the things, you can eat it and you can metabolize it and trap the energy.
我想说,我也不知道说的对不对,可以食用,被代谢,并从中获取能量
-
Because you see, also motivation and energy-- you don't need research for that, you know that when you are feeling good, you have more motivation, you have more energy-- of course, there is a lot of research to back that up.
因为动力和精力-,不需要研究就能明白，你知道感觉好时，动力和精力更充沛-,当然有很多研究支持这一点。
-
And it's nice way to, you know, not be stressed out and just release some energy.
这是很好的方式，你知道，让自己不要压力过大，释放一些活力。
-
you know, it's an energy in Hollywood that you don't find most places, you know.
你知道吗？ 好莱坞有一种大部分地方没有的能量。
-
You know, we've done a bunch of thermochemistry, and we've kind of seen that the energy of mixing, your energetics don't change too much as a function of temperature.
我们做过很多的化学热力学习题，某种程度上我们发现混合的能量，并不随着能量,发生大的改变。
-
Because I know energy doesn't care about the path.
由于能量不依赖于路径。
-
So we know we always want to have our systems in as low an energy as possible, so it makes sense that a bond would happen any time we got a lower energy when we combine two atoms, versus when we keep them separate.
我们知道我们总是希望使我们的系统,处于能量尽可能低的状态，因此就应该有化学键产生,一旦我们合并两个原子之后体系的能量变得更低，相较于分开时。
-
Because you know the energy of one pair.
因为你们知道一对的能量。
-
So we should be able to calculate a z effective for any atom that we want to talk about, as long as we know what that ionization energy is.
我们应该可以计算出任何一个,我们想要谈论的原子的有效电荷量，只要我们知道电离能是多少。
-
And what they could come up with, what they reasoned, is that there must be some intrinsic property within the electron, because we know that this describes the complete energy of the orbital should give us one single frequency.
他们想到着一定和，电子的本征性质有关，因为我们知道这个轨道的,完整描述会给出单一的频率。
-
So, we do this here for the photoelectric effect, and in terms of the photoelectric effect, what we know the important point is that the incoming photon has to be equal or greater in energy then the work function of the metal.
所以，我们做这个是为了说明，光电效应，在光电效应方面，我们知道的最重要的事情,就是入射的光子能量必须等于,或者大于金属的功函数。
-
And what we predict as an energy difference between two levels, we know should correspond to the energy of light that's either emitted, if we're giving off a photon, or that's absorbed if we're going to take on a photon and jump from a lower to a higher energy level.
我们预测，两个能级之间的能量差，我们知道，它要么和发出的光有关,如果它发出光子的话，要么它吸收光子,从低能级跃迁到，更高能级上去。
-
In other words, now I know how to tell how the Helmholtz free energy changes as a function of temperature.
换句话说，我现在知道如何写出亥姆赫兹,自由能作为温度的函数。
-
So, in a sense, it says, you know, if you wanted to build a boat that took energy out of the warmth of the air to sail around the world, you can do that.
因此，某种意义上说，它宣称如果你想要造一艘船,通过从空气中获取热量,这是可以做到的。
-
You know, if you want to measure the potential energy of something in a gravitational field, you have to define the zero somewhere, right, because it's arbitrary. You can set it anywhere you want. It's the same with enthalpy.
你知道，如果你想测量重力场,中某种东西的势能，你需要，在某处定义一个零点，对吧？,因为势能的值是任意的,你可以把它设定在。
-
So if you demonstrate something by writing an intelligent answer just by outlining it and saying, well, what I would do is I would equate the energy lambda and then solve for lambda, I can see that you know what is going on.
如果你想证明一些东西,通过写下一些很天才的答案,仅仅大致说一下，好的，我想做的是能量相等,然后解出，我能看到你知道怎么做。
-
I would ask you to see how such energy level diagrams rationalize what we know to be true.
我想问你，看看这种能级图,如何证实我们知道的是正确的。
-
Well, the energy of the photon, hv we know from Planck, is h nu, which is hc over lambda.
好吧，光子，我们从普朗克那得知，它是，即hc/lambda，波长。
-
So we know that we're in the n equals 5 state, so we can find what the binding energy is here.
我们知道,我们在n等于5的态，我们可以找到结合能是多少。
-
What Einstein then clarified for us was that we could also be talking about energies, and he described the relationship between frequency and energy that they're proportional, if you want to know the energy, you just multiply the frequency by Planck's constant.
爱因斯坦阐述的是我们,也可以从能量的角度来谈论，他描述频率和能量之间的关系,是成比例的，如果希望知道能量值，你用普朗克常数乘以频率就可以了。
-
This intuitively should make a lot of sense, because we know we're trying to minimize electron repulsions to keep things in as low an energy state as possible, so it makes sense that we would put one electron in each orbital first before we double up in any orbital.
这个直观上讲得通，因为我们知道尝试去最小化电子排斥力,从而尽可能的保持处于一个较低的能态,所以它讲得通,在我们在同一个轨道放入两个电子之前,我们首先把电子放入每一个轨道。
-
Now, what do you know about energy?
现在，你对能量了解多少？
-
we start high and go low, we're dealing with emission where we have excess energy that the electron's giving off, and that energy is going to be equal the energy of the photon that is released and, of course, through our equations we know how to get from energy to frequency or to wavelength of the photon.
当我们从高到低时，我们说的,是发射,电子有多余的能量给出，这个能量等于，发出,光子的能量，当然我们可以通过方程,从能量知道，光子的频率，和波长。
应用推荐