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.
Definition of operating profit (loss) The difference between revenues and costs generated by ordinary operations, before deducting interest, taxes, investment gains/losses and various non-recurring items. The term is general; specific definitions depend on the relevant accounting standard or tax jurisdiction.