When scientists use one of their five senses to gather information, they are making an observation.
Much of scientific knowledge has been gained through observation. By using the senses of sight, smell, touch, taste, and hearing, there are many things about the world that can be learned.
Density is m/V. Also, 1 liter = 1000 . So, we get 0.890/(5*1000) = g/cm^3. You can convert this to kg/m^3 as well by multiplying it by 10. Depends which one you want.
