The committee report was the first of three planned to deal with the release of the C.R.U.'s private e-mails on the Internet.
VOA: special.2010.04.27
b The repulsive term goes as some constant lower case b divided by R to the n. N is not the quantum number.
这种斥力很想一个固定的小写字母,被R到n分开的话,N不是量子数。
At very, very low values of r, one over r to the 10th dominates.
在很小很小的r是,1/r的10次方占主导。
The D.A.R. would not permit Anderson to perform in the concert hall because she was black.
VOA: special.2009.01.25
But the nymphs in all of their sensuous beauty, with "flow'r-inwov'n tresses," they have to experience the same fate.
但是年轻女神很美丽,但头发被扯断了“,她们不得不经历同样的命运。
Fans loved the special way she rolled her "r"s to create a sound like a cat.
VOA: special.2009.06.07
pV=RT dT here because the pressure is constant, dV=RdT/p so dV is equal to R over p dT.
因为对1摩尔气体有,于是。
When I was a young child in school, I had to learn the three R's.
VOA: special.2009.07.26
And when we define that as r being equal to zero, essentially we're multiplying the probability density by zero.
当我们定义r等于0处,事实上是把概率密度乘以0.
The e-mails included personal insults to dissenters of C.R.U.studies.
VOA: special.2010.04.27
You might want to say in the real world, if you go to a movie theater for this R-rated movie, "Are you 18 and over or are you with a parent?"
在现实世界中,你可能想说,如果你去电影院看R级电影,“你有18岁吗?,或者你跟随你的父母亲来的吗?“
R.J.Bell of Pregame.com says the number of possibilities to guarantee a perfect bracket are an astronomical 9.2 quintillion.
VOA: standard.2009.03.25
You have to discount something that's one period in the future by dividing it by 1+r.
你必须把未来一段时间内的资金通过,除以1+r来贴现
The song reached the Top 30 on the R&B chart, and led to a contract with Minit Records in her native New Orleans,Louisiana.
VOA: standard.2009.12.25
I'm going to write the particular case of R and take derivatives.
我会写出 R 的一个特例,然后对其求导
Irma continued to have success on both the pop and R&B charts in the 1960s,with her biggest hit coming in 1964, Wish Someone Would Care.
VOA: standard.2009.12.25
So, what's one over R to the 8th going to look like on this scale?
所以R分之一的8次方,在这种情况下会是什么样?
One over R to the sixth will come in, and then jump off precipitously.
/R的六次方会出现,然后陡然减少。
So if we take this term, which is a volume term, and multiply it by probability over volume, what we're going to end up with is an actual probability of finding our electron at that distance, r, from the nucleus.
如果我们取这项,也就是体积项然后,乘以概率除以体积,我们能得到的就是真正在距离,原子核r处找到电子的概率。
pV=RT p plus a over v bar squared times v bar minus b equals r t. All right if you take a equal to zero, these are the two parameters, a and b. If you take those two equal to zero you have p v is equal to r t.
我们就回到,也就是理想气体,状态方程,下面我们来看看,这个方程。
So, for example, if I have a sodium ion over here, and I have a chloride ion over here, where the distance from center to center r I'm denoting as r, this is nucleus to nucleus separation.
所以,比如这有一个钠离子,和一个氯离子,它们中心与中心间的距离,我把它设为,这是原子核和原子和的间距。
So, we can do that by using this equation, which is for s orbitals is going to be equal to dr 4 pi r squared times the wave function squared, d r.
用这个方程,对于s轨道,径向概率分布,4πr的平方,乘以波函数的平方,这很容易理解。
And then the repulsive term, some positive coefficient r and r to a very high number.
然后排斥力,一些正系数,以及具有很大数值的。
And we wrote something that looks, the energy is equal to minus the Madelung constant times Avogadro's number, 0R0 q1 q2 over 4 pi epsilon zero R zero.
我们写下了,晶格能等于负的马德隆常数,乘以阿伏伽德罗常数,乘以q1q2除以4πε
So, let's say we start off at the distance being ten angstroms. We can plug that into this differential equation that we'll have and solve it and what we find out is that r actually goes to zero at a time that's equal to 10 to the negative 10 seconds.
也就大约是这么多,所以我们取初始值10埃,我们把它代入到,这个微分方程解它,可以发现,r在10的,负10次方秒内就衰减到零了。
What we do is we take the interest rate, which I'll call r, and plug it into a formula, which I didn't actually do the arithmetic to their number.
我们只需将利率r,代入等式中,虽然我没有代入数字验证过...
If you go and work that out, log2 log of two and you have two log two, by math you can show that for the line r series m 2*log2 is equal to two natural log of two, which is 1 1.386 which is greater than one.
如果你把它计算出来,这二者的对数,你会得到2个,通过数学,你会得到第r列,第m个值,等于,也就是1。386,这大于。
If you want to write it as a vector equation, you want to write it as v square over r minus-- I want to say that it's pointing in the direction toward the center.
如果要写出矢量方程,就应该写成 -v^2 / r,也就是说,方向就向圆心
g has to be less than r for this to make sense because if g--if it's growing faster than the rate of interest, then this infinite series will not converge and the value would be infinite.
必须小于r才行得通,因为如果g比利率涨的还快,那么这个无穷序列就不会收敛,价值就是无穷了
We'll introduce in the next course angular nodes, but today we're just going to be talking about radial nodes, psi and a radial node is a value for r at which psi, and therefore, 0 also the probability psi squared is going to be equal to zero.
将会介绍角节点,但我们今天讲的是,径向节点,径向节点就是指,对于某个r的值,当然,也包括psi的平方,等于,当我们说到s轨道时。
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