Does Energy Gravitate? Answers Here

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Discussion Overview

The discussion revolves around the question of whether energy is affected by gravity and how this relationship scales. Participants explore theoretical implications, particularly in the context of general relativity and the inertia of energy.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • Some participants assert that energy is affected by gravity, referencing the Eddington experiment of 1919 as evidence of light rays being influenced by gravitational fields.
  • One participant discusses the relationship between energy and inertia, suggesting that energy contributes to an object's weight and inertia in a proportional manner, specifically citing the equation relating energy and inertia.
  • A hypothetical scenario is presented where heating an iron cannonball increases its weight and inertia due to the added energy, illustrating the proposed relationship between energy and gravitational effects.

Areas of Agreement / Disagreement

Participants express varying viewpoints on the relationship between energy and gravity, with some agreeing on the influence of energy on inertia while others focus on specific examples or implications without reaching a consensus.

Contextual Notes

The discussion includes assumptions about the proportionality of energy and inertia, and the implications of general relativity, but does not resolve the complexities of these relationships or the mathematical details involved.

wolram
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I know this question has been asked before but i can not find it, if energy is effected by gravity how does it scale.
 
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Light rays are affected by gravity. 1919 Eddington experiment matched a prediction of general relativity.
 
wolram said:
I know this question has been asked before but i can not find it, if energy is effected by gravity how does it scale.

Energy contributes to a thing's inertia, and to the amount is pulled by gravity, exactly in the proportion you would expect. energy = c2 times inertia
inertia = energy/c2

So if you have an iron canonball and you heat it, so it absorbs a little energy. Then its weight will increase proportionally by that amount. (that is, how much it is pulled)
and its inertia will increase in the same proportion as its weight does
 
Thanks.
Mathman, Marcus
 

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