C4H10 AND C2H5 have the same empirical formula
It might be 23% because 77% of water covers earth and most of the water is either polluted or salt water.
Answer:Physical systems differ from social systems because a physical system refers to systems that rely on a group of physical parts to perform a function. Examples of a physical systems are solar systems or even an animals digestive system. Social systems are systems like an ant colony, wolf pack, or a town.
Explanation: