The way to read this diagram is it's as if it were my brain and I am facing this way.
查看这张示意图的方法是,设想这是我的大脑,面朝这个方向
Be disciplined in order to continue to take the small steps that you're taking in order to really work towards that.
做好计划使你能够不断地朝这个方向慢慢进步。
So, if instead you put your particle somewhere down here on the electric field, or on the wave, the electric field will now be in the other direction so your particle will be pushed the other way.
还有方向,所以如果,你把粒子放在这下面,电场的方向相反,粒子会朝另一个方向运动。
And we're going to have q2 prime, and we're going to draw the arrows in the positive direction in these cases.
还有q2一撇,在这个例子中,我们把箭头朝正方向。
Because once things started moving, it tends to move in that direction.
因为一旦事物开始改变,他们就会有朝这个方向运动的倾向。
Then you guys know, you just told me, acceleration is -9.8, We call it "minus" because it's accelerating down and up was taken to be the positive direction.
然后你们都知道,你告诉我,加速度是-9.8,我们取负号是因为加速度方向朝下,而正方向为竖直向上
So the pink line is going to move towards the vertical, and the blue line is going to move towards the horizontal, and notice that the amount of effort that we generate, goes down dramatically, goes down in this direction.
粉色的线最后会趋向垂直,蓝色的线最后会趋向水平,请大家注意下我们付出的努力,会朝这个方向大幅减少
So, then we go to thermodynamics and chemical equilibrium, and this is really about chemical reactions -- weather a reaction will go, will it be spontaneous, if there an equilibrium, what direction will the reaction be shifted in.
然后我们要讲到热力学和化学平衡,这都和化学反应有关,一个反应是否能发生,是不是能自发反应,如果存在化学平衡,它会朝什么方向移动。
So you can see, if it's spinning on its own axis in this direction we'd call it spin up, where as this way it would be what we call spin down.
你们可以看到,如果它绕自己的轴朝这个方向转,我们就说它是自旋朝上,这个方向我们叫它自旋朝下。
Heat is flowing this way.
热是朝这个方向流动的。
By the way, I didn't tell you this but I think you know that I picked my origin to be here and measured y positively to be upwards and I called that 15 meters.
顺便说一下,虽然我没明确指出,但我想你们应该都知道,我把原点取在这里,并规定y的正方向朝上,我设把这里的高度为15米
Specifically, it's always the z that forms the sigma orbital, and the reason is at least at a minimum for this class we always define the internuclear axis as the z axis, so this is always the z axis, so it's always going to be the 2 p z's that are coming together head-on.
特别的,z总是形成sigma轨道,这是因为至少在这个课里面,我们总是定义核间轴为z轴,所以这总是z轴,所以2pz轨道总是,朝一个方向出现。
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