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.
The worldâs economic systems fall into one of four main categories: traditional economy, market economy, command economy and mixed economy; however, there are unlimited variations of each type.An economic system must define what to produce, how to produce it and for whom to produced it.he worldâs economic systems fall into one of four main categories: traditional economy, market economy, command economy and mixed economy; however, there are unlimited variations of each type.