So we've seen one example of this, this idea of walking through all the integers looking for the square root.
现在计算机速度很快了,我可以把这个数字设的更大点,计算机会去很快的做这个事情。
So, if we do this calculation for an electron, saying it moves at 10 to the 5 meters per second, then what we end up with for a wavelength is 7 times 10 to the -9 meters.
如果我们已知电子以,10的5次方每秒的速度运动,那么做一个计算,可以得知它的波长是,7乘以10的负9次方米。
Well, so much for the speed of the computer.
好的,计算机的速度就这么快。
Just take the derivatives and that's the velocity vector.
直接计算对时间的导数就是速度矢量
What it means is if you'd release a rock at that location one second before with a certain speed that we can calculate, it would've ended up here with precisely the position and velocity it had at the beginning of our experiment.
它的意义在于,若在该处以特定速度抛出一个物体,这个速度可通过计算得到,一秒之后,物体会运动至我们设定的起点,并且速度为我们设定的初速度
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