How could density be used to determine the concentration of antifreeze in a cooling system of an automobile?

Answer 1

Good answer but it begs another engineering-type question. If the density is only different by 0.02, how accurately do you actually know that? Accurately, that is. Those numbers are only different by 4 units in a 100 or so, implying that you can make measurements of some kind at that level of accuracy (note that the word is not resolution here, it is accuracy). So, the answer given is true but I don't think that it is particularly practical to use it as a measurement. Might be wrong, maybe hygrometers are that good.