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"If that happens, we don't see car sales going into negative territory."
VOA: standard.2009.03.13
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So that means that the more stable molecule is going to be this molecule here, which actually puts the negative charge on be more electronegative atom.
因此这意味着更稳定的分子,应该是这一个，它真正把负的电荷放到了,电负性更高的原子上。
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This thing better start turning negative soon or we are going to change the way the world works here.
它们很容易一开始就转化成负的,或者我们将取改变那儿工作方式。
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So this is not going to be a favorable process, we're going to find that the electron affinity is actually a negative 7 kilojoules per mole for nitrogen.
因此这并不是一个容易发生的过程，我们会发现氮的电子亲和能,应该是负的，7，千焦每摩尔。
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They're going to move from a negative pole to a positive pole, so they're going to move through this gel.
它们会从负极移向正极,会通过这块凝胶板
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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
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So zero is supposed to be neither positive nor negative, and here I am just simplifying and saying it's actually going to be negative.
所以0不是一个正数，也不是负数，在这里我只是简单地,说明它实际上会是负数。
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Above some temperature is going to be positive, below some temperature is going to be negative.
低于这一温度它是负数，我们一般忽略这些高阶项。
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And I'm going to get minus 2, which came from here: minus 2 and that is in fact negative, which is what I wanted to know.
最后只剩下-2了,2是一个负数,这正是我想要的
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10 Even if your content subtotal was negative ten, that doesn't mean you're not better off alive, because negative ten plus the extra hundred points for the mere fact that you're alive is still going to give you a positive total, 90 plus 90.
就算你的生活内容部分总和是，那也不意味着你活得不够好，因为-10加上额外的100分说明了,你活着得到的总和仍然是正数，超过。
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It's going to run through the loop, accumulating the answers, but because I'm subtracting, x it's just going to keep making x more and more negative as it goes along, again it's off into an infinite loop.
它一直在循环，不断的累加答案，这是因为我一直在对x做减法，这使得作为负数的,变的越来越小，又进入一个无限循环了。
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Right, because when we think of an energy diagram, that lowest spot there is going to have the lowest value of the binding energy or the most negative value of binding.
对因为当我们考虑,一个能量图时那里最低的点,是具有最低的结合能,或者最不活跃的结合能。
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And that's going to be equal to the negative the binding energy of 2 s in b, in neutral boron.
它应该等于中性硼原子中,2，s，电子的束缚能的负值。
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And this end is going to be negative.
末尾将是负的。
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So you'll notice that I'm just going to put in numbers here and then the negative of the number and the numbers are roughly like this: . So the numbers are , , , , and .
你们会注意到我会先写一个正数,然后再写出它的相反数,收益大概如下,分别为,和
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If we want to talk about two hydrogen atoms, then we just need to double that, so that's going to be negative 2 6 2 4 kilojoules per mole that we're talking about in terms of a single hydrogen atom.
而要讨论两个氢原子，我们只需要把它乘以二，因此应该是负的，2624，千焦每摩尔,这就是单个的氢原子的情况。
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So, we need to actually add on this fourth quantum number, 1/2 and it's either going to be plus 1/2 or negative 1/2.
所以我们需要加上这第四个量子数，它等于1/2或者负的。
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So let's look at a case where it's actually going to be negative.
那么让我们来看一个它是负值的例子。
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So you don't want to put in a negative energy, that's not going to help you out, you need to put in positive energy to get an electron out of the system. So that's why you'll find binding energies are always negative, and ionization energies are always going to be positive, or you could look at the equation and see it from there as well.
因为这对电离没有帮助,你需要一个正的能量,使得电子脱离这个系统,这就是为什么你会发现,结合能总是负的而电离能总是正的,或者你们看这个方程也可以发现这一点。
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And since we have two bars that are together like this, once they're both loaded up with electrons there's going to be negative charges that repel, so the electrons will want to get as far away as possible, and they're on their slow way to doing that, to getting as far away from each other as possible.
因为我们有两个棒像这样在一起，一旦它们加载了电子,就会因为有负电荷而排斥，所以这些电子就会,互相离开的尽可能远，它们的这个过程很慢，离开的尽可能远。
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Delta v is going to be negative. w is going to be negative. Sorry, I got it backwards again.
这样就对外界做了功,这时候ΔV是正的。
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Convention, OK, this negative sign is just a pure convention. You just got to use it all the time. If you use an old textbook, written when I was taking thermodynamics, they have the opposite convention, and it's very confusing. But now we've all agreed on this convention, and work is going to be with the negative sign here.
系统对外界做功的符号为负,这就是我们,在本课中的规定，纯粹出于统一符号的需要，有些教科书中，可能会使用相反的符号规定,注意不要混淆了，这门课上,我们将一直使用。
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Yes. The point is, it's not going to work, and she caught both of them, impressive, it's not going to work because iters left is already negative, it's just going to skip the whole loop, and I'm in trouble, so thank you for catching that.
是的，重点是，程序不会运行的，她发现了两个错误，很令人敬佩，程序不会运行,因为iters，left已经是负数了，它会跳过整个循环，然后就有麻烦了，谢谢你提出这个问题。
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So the allowed values for m sub l 0 are going to be negative l, all the way up to 0, l and then up to positive l.
所以m小标l的可能值,是从负l，一直到，然后到正。
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Now if you're at the temperature which is b higher than the inversion temperature, in that case here, a over RT is small compared to b, and this is going to turn out to be negative.
T>Tinv】,这时a/bR小于,结果是负数，因此如果温度。
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So, for example, in a hydrogen atom, if you take the binding energy, the negative of that is going to be how much energy you have to put in to ionize the hydrogen atom.
例如在氢原子里面,如果你取一个结合能,它的负数就是。
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When t is equal to 10,000 years or 10,000 seconds, you're going to find y is some huge negative number.
当t为一万年或一万秒时,我们得到y是一个极大的负数
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And that's going to be equal to negative z effective squared times r h over n squared.
有效的z的平方,乘以RH除以n的平方。
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So we know that we can relate to z effective to the actual energy level of each of those orbitals, and we can do that using this equation here where it's negative z effective squared r h over n squared, we're going to see that again and again.
我们知道我们可以将有效电荷量与,每个轨道的实际能级联系起来，我们可以使用方程去解它,乘以RH除以n的平方,它等于负的有效电荷量的平方,我们将会一次又一次的看到它。
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And it turns out that if we have a, for example, for s, a very large z effective or larger z effective than for 2 p, and we plug in a large value here in the numerator, that means we're going to end up with a very large negative number.
结果是如果我们有一个，举例来说对于s一个很大的有效电荷量或者,比2p大的有效电荷量，并且我们将一个较大的值代入计算器，那意味着我们最后会得到,一个非常大的负数。
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