Nuclear Binding Energy: Is Conservation of Energy Violated?

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Discussion Overview

The discussion revolves around the concept of nuclear binding energy and whether the apparent difference in mass between individual nucleons and a nucleus leads to a violation of the law of conservation of energy. The scope includes theoretical considerations and conceptual clarifications related to nuclear physics.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants assert that individual nucleons are heavier than the nucleus, suggesting that this difference implies a higher gravitational potential energy for nucleons compared to the nucleus, which raises questions about conservation of energy.
  • One participant proposes that the negative nuclear binding energy could be interpreted as having "negative weight," which might offset the gravitational potential energy difference.
  • Another participant expresses confusion about the initial reasoning, questioning how the heavier particles having more gravitational potential energy could violate conservation of energy.
  • A different participant states that the binding energy being negative resolves the concern about conservation of energy, indicating that it does not violate the principle.

Areas of Agreement / Disagreement

Participants express differing views on the implications of nuclear binding energy and gravitational potential energy, with no consensus reached on whether the initial claim about conservation of energy holds validity.

Contextual Notes

Some assumptions regarding gravitational potential energy and binding energy are not fully explored, and the discussion does not clarify the relationship between these concepts in the context of general relativity.

talksabcd
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We know that induvidual nucleons are heavier than the nucleus. So Nucleons
should have more gravitational potential energy with respect to the rest of the universe than the nucleus. Doesn't this violate the law of conservation of energy ?
 
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talksabcd said:
We know that induvidual nucleons are heavier than the nucleus. So Nucleons
should have more gravitational potential energy with respect to the rest of the universe than the nucleus. Doesn't this violate the law of conservation of energy ?

I'm not an expert in this, but I think that an approximate answer is that the negative nuclear binding energy sort of has "negative weight" and therefore has negative gravitational potential energy WRT the rest of the universe. That makes up for the difference.

I also think that the answer is weirder (and more complete) in general relativity, which I don't understand. I hope one of the real physicists answers this soon, I'm interested.
 
OP - I'm not following your reasoning here, why would heavier particle having more gravitational PE violate the law of conservation of energy?

Claude.
 
talksabcd said:
So Nucleons
should have more gravitational potential energy with respect to the rest of the universe than the nucleus. Doesn't this violate the law of conservation of energy ?
No it does not because the binding energy is negative in value !

marlon
 

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