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Looking down 10 stories over Ground Zero, Marine Corporal Jonathan Rist said he hoped the new construction going on below would not remove every last shred of the buildings destroyed in the terrorist attacks of September 11,2001.
VOA: standard.2009.08.01
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B=0 There's going to be some temperature where B is equal to zero. In that case, your gas is going to look awfully like an ideal gas.
在某个温度,这时，实际气体的表现，十分接近理想气体,高于这一温度它是正的。
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So we can see if we look at the probability density plot, we can see there's a place where the probability density of is actually going to be zero.
就能看到,有些地方，找到一个电子的,概率密度,我们可以考虑。
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I could have done this in another way but I am going to just be extra deliberate so I make sure that this copy ends with back slash zero and voila, now, I have a copy.
我可以用另外一种方式来处理,我确保这个拷贝由反斜杠0结尾,那样，现在我得到了一个拷贝。
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We're still going to be able to write that dq=0 it's an adiabat so that dq equals zero.
绝热条件依然成立,于是。
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That's going to presumably be given--mathematically if we gave it a number, we'd slap a zero on that.
如果用数学解释,给它一个数字，给它一个零。
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If you're relentlessly selfish and calculating you would say, the chances that I decide the election are zero, so I'm just not going to bother.
如果你唯利是图,精于算计,你会说,我的投票能够决定选举的概率是零,所以我根本无需投票
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Somebody's up there going and it's actually the bass so we'll be wanting to zero in on the bass in a big way in music because that's oftentimes giving us much more information than the melody.
有些人在那唱,事实上那是低音,所以我们在音乐中,主要将注意力集中到低音上,因为大多数情况下,相比旋律而言,低音给我们的信息更多
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I know the energy in this first pair would equal -e^2 That is just going to equal minus e squared over 4 pi epsilon zero r naught.
我们明白第一对的能量将会等于,等于,/4πε0，R圈。
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So, for starters we'll keep that as our zero energy, we're going to change it soon to make something that makes more sense in terms of bonding, but we'll keep that as zero for now.
因此，首先我们将会保持零点能的这个定义，但很快我们就会对它进行修改,使它在讨论成键时更合理，但是目前我们还是暂时采用这种定义。
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And I'm going to call this the you can break even at zero degrees Kelvin law.
我把它叫做,你能在0下,保本定律“
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Angular nodes, we're not going to have any of those, we'll have zero, l equals 0, so we have zero angular nodes.
角向节点，当然,是没有的，０个，ｌ等于０，所以是０个角向节点。
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So my answer is always going to be zero and therefore almost always going to be wrong. Yeah?
所以我的答案总会是,因此，几乎这总是错误的，对不？
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And if that's equal to zero, that means that the Joule-Thomson coefficient for an ideal gas is also equal to zero. We're going to actually prove this later in the course.
说明理想气体的,焦耳-汤姆逊系数也等于0。,详细的证明过程,会在以后的课上给出。
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So, at this place where it hits zero, 0 that means that the square of the wave function is also going to be zero, right.
它达到0的地方，这意味着波函数的，平方也是,如果我们看概率密度图。
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> David: Yeah, it's going to count from zero 100 up to one hundred percent.
>，大卫：是的，它将从0开始,计数到。
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Now that already tells us what we know, which is that the efficiency is going to be something less than zero, right?
我们都知道这个，这结果就是说效率,是负的，对吗？
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And so now, instead of using these reference points for the Kelvin scale, we use the absolute zero, which isn't going to care what the pressure is.
就像理想气体温标,与气体的种类无关一样，具有普适性，在开尔文温标中。
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And so, the radial probability density at the nucleus is going to be zero, even though we know the probability density at the nucleus is very high, that's actually where is the highest.
所以径向概率密度,在核子处等于零，虽然我们知道在，核子处概率密度很大,实际上在这里是最大的，这是因为。
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So, the wave function at all of these points in this plane is equal to zero, so therefore, also the wave function squared is going to be equal to zero.
因此这里的,波函数平方也等于零，如果我们说在这整个平面上,任何地方找到一个ｐ电子的概率都是零。
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> It's going to count from zero.
>，它将从1开始计数到【听不见的】
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but right now you're going to have to take it for granted. So, if the Joule-Thomson coefficient is equal to zero, just like we wrote, du = Cv dT du = Cv dT for an ideal gas, we're going to dH = Cp dT have dH = Cp dT for an ideal gas as well.
但是现在请你们应该把它看成理所当然的,所以，如果焦耳-汤姆逊系数等于零,就像我们写的，对于理想气体,我们也可以得到对于理想气体。
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f Well, call toupper pass this lowercase F F to this function called toupper it's going to return capital F and so what do I assign to s2 bracket zero?
调用toupper函数，传递这个小写,然后返回的是大写的,那么我对s2【0】赋值多少？
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Going from two to three, that's an adiabatic expansion, so q is equal to zero in that step.
从第二点到第三点，是绝热膨胀，因此q等于零。
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It's well insulated. Heat is not going in or out adiabatic. q is equal to zero.
绝热性很好，热量不会变化,是绝热的，Q等于零。
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You can also have angular notes, and when we talk about an anglar node, what we're talking about is values of theta or values of phi at which the wave function, and therefore, the wave function squared, or the probability density are going to be equal to zero.
我们也可以有角向节点，当我们说道一个角向节点时，我们指的是在某个theta的值,或者phi的值的地方，波函数以及波函数的平方，或者概率密度等于零。
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It's not going to be zero this time because we have non zero heat exchange between the system and the environment, right.?
热力学量，但是现在让我们看一下,我们的特殊函数，这次它不会是零,因为系统与外界的热量交换并不是零，对吧？
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Why 1? It's arbitrary, but it's anything other than zero so I just exit because something went wrong and this program is just going to bail.
为什么是1？这是任意的，但它是非零的,因为出错了，我退出程序,然后这个程序就释放了。
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Just take a look: if this is 9, 5 divided by 9 is always going to be 0 point something, and if you thus have two integers and you're rounding down, which is what happens when you do integral math we're using this operator, I'm going to get zero times whatever.
稍微看一看：如果这是9，5除以9会得到,0点几，如果你用两个整型数,你舍去小数，这就是当你们,用整型数使用这个操作的所发生的事情，我将得到数值0乘以任何一个数字。
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The answer is always going to be zero.
那个答案总归是。
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