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Again we have the charge of the nucleus on plus 2, +2 but let's say this time the electron now is going to be very, very close to the nucleus.
对于我们的氦原子，我们有一次得到了原子核电荷量为,但是我们说这次电子。
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V+dV And this is going to be here V plus dV.
这里是。
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J++ Now here's the semicolon, J less than N, where N is this, J plus, plus; so what am I doing?
现在这里是一个分号，J小于N，N是这个，那么我在做什么？
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If I reduce that it would be 3 plus t of b minus 3, so in general 3*k+t this is 3 k plus t of b minus k. OK.
把b减去一个,在外面加个3就可以了,因此也就是。
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One thing I can guarantee from past experience in this class, is that the median grade will be a B+.
不过从教学经验看,中间成绩应该是B+
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You know that if you took a derivative of this, you will find v of t is v0+at.
如果你对这个式子求一次导,你将会得到v=v0+at
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This point here then is the present value of your income; it's Y today + / .
直线与x轴的交点表示收入的现值,它等于
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So we are really looking at this reaction here H+ for ionization. It is H gas neutral goes to H plus in the gas phase plus the electron. And, furthermore, we can have multiple ionization energies.
所以我们真正看到的是,电离，它是在气相中H变为,和电子的过程，还有，我们能电离能加倍。
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You can verify, in this simple example, that A + B is the same as B + A.
在这个例子中还可以验证,A + B = B + A
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This is 3 plus 3 plus t of b minus 2. Right?
+3+t对不对？
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This is only true for an ideal gas. Since it's true for an ideal gas, then we can go ahead and replace this with Cv, and then we have Cp=Cv+R Cp with Cv plus R, which is what we were after.
常犯的一个错误，这只对理想气体成立,因为对理想气体成立,所以我们可以继续，用Cv代替,这项，最后得到。
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This is A + A. We're going to call it 2A.
这就是 A + A,我们也把它称为 2A
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counter++ So this is like counter ++.
用C语言表示就是。
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Consequently, for this object the position y, at any time t is known to be 15+10t-5t^.
因此,对这个物体来说,在任意时刻的位移y,就应该为15+10t-5t^
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So basically the idea is that the more these firms produce, so the more the total quantity produced q1 + q2, the lower is the price in the marketplace for this product.
核心思想就是两家企业生产得越多,即产量,q1 + q2,越大,该产品的市场价格就越低
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This is A + A.
这就是 A + A
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