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This category is within the scope of WikiProject Time, a collaborative effort to improve the coverage of
Time on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.TimeWikipedia:WikiProject TimeTemplate:WikiProject TimeTime articles
This category is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of
Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
This category is within the scope of WikiProject Energy, a collaborative effort to improve the coverage of
Energy on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.EnergyWikipedia:WikiProject EnergyTemplate:WikiProject Energyenergy articles
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