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| abstraction > hypothesis > theory > law > thermodynamics law > virial theorem | 
| virial theorem comparison table | |||
| Subject | is an instance of | is a kind of | has definition | 
|---|---|---|---|
| thermodynamics law | law | ||
| virial theorem | thermodynamics law | For a bound gravitational system the long-term average of the kinetic energy is one-half of the potential energy. | 
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