I have another blog that doesn't suck. Archive:
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Suppose you are sitting in a room and there is a flock of ducks outside. You hear the ducks quacking and you can count the rate of quacking !!r_q!! in quacks per minute. Maybe you also know how much a typical duck will quack. Let's called that !!v_q!!, measured in quacks per duck. Then you can find the quotient $$\frac{r_q}{v_q}$$ which is in ducks per minute. More things should be measured in ducks per minute.
