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.
What is an 'Operating Cost'. Operating costs are expenses associated with the maintenance and administration of a business on a day-to-day basis. The operating cost is a component of operating income and is usually reflected on a companyâs income statement.