BRAINLIEST AWARD PLZ HELP :)

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

An ice cube with a volume of 45.0ml and a density of 0.9000g/cm3 floats in a liquid with a density of 1.36g/ml. what volume of the cube is submerged in the liquid