A nuclear stress test is similar to the exercise stress test or pharmacological (chemical) stress test, but a small amount of radioactive substance is used to determine the health of the heart and blood flow to the heart.
The following are the four basic types of economics resources: Land â natural resources such as iron ore, gold, diamonds, oil, etc. Labor â human resources such as wage-earning workers. Capital â plants and equipment used in the production of final goods, such as assembly lines, trucks, heavy duty machinery, factories, etc.
Hence four types of economies may be distinguished: first, an economic system based only on the market mechanism, without planning; second, an economic system based only on administrative centralized day-to-day management, without planning; third, a planned economy with administrative centralized day-to-day management; and fourth, a planned economy ...