And typically, we'll be treating at least some cases where we're dealing with ideal gases in which case we can easily get delta u.
那么我们也可以定出功,对吧?,典型地,我们至少会处理,一些理想气体的情况。
Now, you know with constant volume, H now it's not going to be delta H that's U straightforward to measure, it's going to be dealt u, all right.
好,现在你们知道在体积恒定的条件下,我们得到的不是Δ,我们直接测量到的是Δ,好,但这基本上也是一样的。
This sense, this glamour thinking, along with price increases, caused Los Angeles to boom; so it's the boomiest U.S. City.
某种意义上,群星荟萃加上房价上涨,推动了洛杉矶房地产的繁荣,所以它成为了全美房产最繁荣的地方
This curve here with the square shows you how many millions of vaccine doses were distributed across the U.S.
这个带方形的曲线图显示了,在美国数以百万计的,疫苗是如何使用的
I don't know if any of you watched tennis recently, but the U.S. Open has been shown and there's an Oreo advertisement with the William sisters and so you--that's why people know about these foods.
不知道你们最近看没看网球赛,美国网球公开赛上有一则奥利奥广告,是由威廉姆斯姐妹做代言的,人们以这种方式听说这类食品
They've become forces of nature in the U.S. Economy, in the sense that people accept these letter grades with great authority.
他们和美国经济密不可分,在这种情况下,人们笃信机构的字母评级
I managed to find price indexes for Norway and Netherlands going back to 1890 and compared that with the U.S.
我找到了挪威和荷兰1890年的,价格指数数据,和当时的美国作比较
So, I just want to write a few examples down with a few values for delta u or delta H or delta S, and see whether we can get any clues from what we see.
我先写一些例子,例子包含一些内能,自由焓和熵的变化数值,然后看从中,我们能不能得到一些启示。
The SEC was very controversial at first because it was seen as interfering with business and the U.S. Has been built on principles of individual freedom; this seemed like unnecessary government intrusion.
起初,证券交易委员会引起了许多争议,因为人们认为它会干扰商业运作,个人自由是美国的立国之本,政府的干预似乎并非必要
We call an instrument of the U.S. Treasury with a maturity less than or equal to one year--we call that a bill and they used to be the only discount bonds issued by the U.S. Government.
我们把期限小于或等于一年的,国库券品种称为短期国库券,它们曾是美国政府,唯一发行的贴现债券
Now remember that only appears in DNA and appears in RNA, and so can also form a hydrogen binding pair with .
还要记住T只出现在DNA中,而U出现在RNA中,U和A也可以通过氢键结合就可以了
How happy I am with x dollars is called U.
我对于x美元的满意程度设为U
OK, so for a constant volume process, du we can write du, partial derivative of dT u with respect to T at constant V, dT, dv plus partial derivative of u at constant V, dV.
好,对于一个恒定体积的过程,我们可以写出,等于偏u偏T,V不变,加上偏u偏V,T不变。
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