Examlex
Which of the following is an example of an open system?
Petroleum
A naturally occurring, yellowish-black liquid found beneath the Earth's surface, used primarily as a fuel source in its refined form.
Commercial Energy
Energy that is produced and sold for profit, including fossil fuels, nuclear, and renewable energy sources used in industrial, commercial, and residential settings.
United States
A federal republic located in North America, comprising 50 states and known for its significant global economic, cultural, and military influence.
Breeder Reactors
Nuclear reactors designed to generate more fissile material than they consume, thereby extending the use of nuclear fuel resources.
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