The density of gasoline is 690kg/m^3 and the density of turpentine is 870kg/m^3 Suppose you find a 5L can that is full of one of these liquids. You do not know which, and the label has fallen off, How could you tell the difference ?

Question

andrefontex · Answer

mixing a sample from that can with a compound with density near 780 Kg/m^3.
If the compound goes down, and the liquid of the can stays up, density of the compound is higher, and then it would be the gasoline with d=690 on top. If the compound went up, above the liquid you want to determine, density is less then that, and the liquid below would be the turpentine

anonymous · Answer

Weigh it and compute the density, of course.