So delta u is just equal to the work but we also know what happens T2 because the temperature is changing from T1 to T2.
所以Δu等于输出的功,但我们也知道它会发生,同时我们知道温度从T1变到。
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
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