So if we wanna know the rateofchange of neutrons as a function of time we will write this expression.
所以,当我们想要知道中子的变动率,那是时间方程,我们会写下这个表达式。
2
Remember angular velocity is just the rateof the change of the angle over time.
角速度,是角度随时间改变的快慢。
3
How else are you going to calculate how much your parts costs have gone up, or automatically give a limited-time discount to a valued customer, or calculate the effect of a retroactive ratechange?