There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements. CROSS SECTION shows Earth's structure.
â The operating margin was an especially useful metric or ratio during the meeting as we wanted the discussion to include revenue statistics.
Profit Margin. Definition. Profit margin represents the percentage of revenue that a company keeps as profit after accounting for fixed and variable costs. It is calculated by dividing net income by revenue. The profit margin is mainly used for internal comparisons, because acceptable profit margins vary between industries.