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Where is an observer's nadir?
Japan
An island country located in East Asia, known for its rich culture, technological advancements, and economic power.
Opportunity Cost
The expense of not choosing the second-best option while making a choice.
Machinery
Mechanical devices or assemblies, often powered by electricity or engines, that perform specific tasks, commonly used in industries for production processes.
Petroleum
A natural, flammable liquid found in the Earth's formations, composed of a complex mixture of hydrocarbons and used primarily as fuel.
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