Homeostasis is a tool that your body uses to keep things in balance. Such as your body temperature. Too hot, you start to sweat. (which cools you down as it evaporates) And when you're too cold, your body starts to shiver, effectively warming you up by making your body move rapidly.
Their phenotypes because it just is I learned about it recently
The heat of fusion of the ice is the amount of energy that is required in order to melt one gram of ice. In this item, in order to solve for the heat of fusion, we simply have to divide the given energy by the mass.
heat of fusion = 16650 J / 50 g = 333 J/g
Thus, the heat of fusion of the ice is 333 J/g.