What is y-y0? The final y is 0, the initial y is 15. You solve for that equation and you will find the final velocity.
-y0是什么,末态的y是0,初态的y是15 你们已经得到,然后你可以找到最终速度
If its in Cartesian form I'll pass in an x and y and compute what a radius and angle is.
来得到的这个点,我都可以得到这个点的,全部的这种信息。
So, what we end up having is three of these pi -- 2 p y 2 p y bonds, we can have one between these two carbons here.
我们剩下的有三个π键-,2py2py键,在这两个碳原子之间会有一个。
And just as with variables, you should use some common sense, some style here, and the function's name should X Y communicate what it does, calling it X or Y or Z is generally not all that helpful.
就像变量,你使用一些常识,一些类型,和函数名需要,传达它所做的事情,把它叫做,或者Z通常是没有什么用处的。
What we can actually do is we could solve out for the X and for the Y.
实际上我们能够解出X和Y的值
If you go to another neighboring country, that's what they think is naturally x and y.
如果你们到了另一个相邻的国家,这就成了他们所惯用的 x 和 y 方向
And what is all this stuff? Y is at one, one-half, one-third?
那这一些是什么,呢,Y在1,1/2,1/3上?
Three ounces of meat might have x calories or it might have y calories depending on what the meat is, how much salad dressing gets thrown on a salad, how much of this gets or that gets put in a food will vary its calorie content a lot.
三盎司的肉也许有x卡路里,也许有y卡路里,取决于肉的种类,色拉中放了多少色拉酱,在食物中有多少这个或那个,也会导致卡路里含量的差异
If it's in polar form I passed in a radius and angle and I'll compute what the x- and y- value is.
以及半径和角度,但是现在是这样的,不管我是以哪种形式。
Second possibility, if Mr. X enters but Mr. Y wins, then X's payoff is what?
第二种可能,如果X先生参选但是Y先生获胜,X先生的收益是什么
Well you know what a point is, it's got an x- and a y- coordinate, it's natural to think about those two things as belonging as a single entity.
把这两个坐标认为,是属于一个独立的实体,是理所当然的事情,因此实现这个目的的。
Now, we are done because now we can ask how high does it go, and you go back to your y of 1 is 15+10-5, which is what?
现在问题解决了,因为我们可以算出,最高点的高度,你回到这个式子,求出y=15+10-5,是多少
And similarly, actually, if we're looking at our polar coordinates here, what we see is it's any place where theta is equal to is what's going to put up on the x-y plane.
类似的,如果我们,看这里的极坐标系,我们能看到只要在theta等于,多少的地方就是xy平面。
The value 2 is still in what we called Y. It's now also in what we called X, but notice inside of main and here's the power.
数值2还是在y中,现在,它也在x中,但注意在main中,这是那个能力。
I then print what Y is.
然后打印Y是什么。
If you say, "Add the vectors, " I would just add the x to the x and the y to the y and I'm keeping track of what the sum is.
如果你们说 " 将矢量相加 ",我就把同为 x 轴方向的分量相加,同为 y 轴方向的分量相加,然后就能得出这两个矢量的和是多少了
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