the lawnmower running over guy’s foot in the mad men episode is an illustration of the principle called

~kinetic ~potential

explanation:

kinetic and potential energies would be types of mechanical energies.

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.

answer; environmental science;