What is the total energy of the universe?

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Discussion Overview

The discussion centers around the concept of the total energy of the universe, specifically focusing on the idea of "gross energy" as opposed to "net energy." Participants explore the definitions and implications of these terms within the context of physics.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant seeks clarification on the concept of gross energy, indicating a preference for a measure that is not net energy, which they believe is zero.
  • Another participant questions the meaning of gross energy, suggesting it might refer to the absolute value of all positive and negative energies combined.
  • A third participant argues that gross energy may not be a well-defined concept, citing the existence of different reference frames that could yield varying descriptions of energy, such as kinetic and gravitational potential energy.
  • A later reply acknowledges the complexity of the discussion and mentions knowledge of four laws of thermodynamics, implying a connection to the broader topic of energy in physical systems.

Areas of Agreement / Disagreement

Participants express differing views on the definition and validity of the concept of gross energy, indicating that multiple competing perspectives remain without a consensus.

Contextual Notes

There are unresolved questions regarding the definitions of gross and net energy, as well as the implications of different reference frames on energy measurements.

Char. Limit
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What is the total energy of the universe?

I would like a gross energy, not a net energy, as I saw somewhere that the net energy of the universe is zero.
 
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There is no reason to think that Gross energy is a well-defined concept. Presumably there are two different references frames describing the same universe, one with a lot of kinetic energy and gravitational potential energy, and one with less kinetic energy and gravitational potential energy. This could be done just by rescaling the coordinates.
 
Indeed.

Interesting discussion... So now I know of four laws of thermodynamics.
 

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