Happiness, in psychology, a state of emotional well-being that a person experiences either in a narrow sense, when good things happen in a specific moment, or more broadly, as a positive evaluation of one's life and accomplishments overall—that is, subjective well-being.happiness, in psychology, a state of emotional well-being that a person experiences either in a narrow sense, when good things happen in a specific moment, or more broadly, as a positive evaluation of one's life and accomplishments overall—that is, subjective well-being.Hii..
Microeconomics is the study of economics at an individual, group, or company level. Whereas, macroeconomics is the study of a national economy as a whole. Microeconomics focuses on issues that affect individuals and companies. Macroeconomics focuses on issues that affect nations and the world economy
Therefore, the total mass is not conserved. This is the limitation of the conservation of mass. The other limitation of conservation of mass is according to Einstein's theory, the relation between two quantities is given by E = mc2, which means that energy and mass are interconvertible.