Examlex
A 20% efficient heat engine that must do 50 J of work each cycle requires a heat input of 250 J per cycle.
Basic Nature
The fundamental qualities or characteristics inherent in something or someone, often considered innate or essential.
Heraclitus
An ancient Greek philosopher known for his doctrine that change is the fundamental essence of the universe, famously captured in the phrase "You cannot step into the same river twice."
Electrical Charges
A fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types: positive and negative.
Emptiness
In philosophic and spiritual contexts, a concept highlighting the absence of inherent existence or essence in phenomena; in everyday use, the state of being empty.
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