Does the Theory of Relativity Affect the Concept of Mass?

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Discussion Overview

The discussion centers on the nature of mass and its relationship to gravity, particularly in the context of the Theory of Relativity. Participants explore whether mass is an absolute property or if it varies with gravitational fields, as well as the implications of relativistic effects on mass.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions whether mass is absolute or dependent on gravity, emphasizing a distinction between mass and weight.
  • Another participant explains that mass is the proportionality constant in the equation F = ma, noting that while weight varies with gravity, mass remains constant regardless of location.
  • A different viewpoint suggests that mass appears to increase in stronger gravitational fields due to the energy associated with being in a gravitational field, indicating a relationship between mass and gravitational energy.
  • One participant proposes a personal idea that mass is related to charge, suggesting that mass exists in charged particles but not in massless entities like light.
  • A later reply seeks clarification on whether the Theory of Relativity implies any changes to mass when objects move at particular speeds.

Areas of Agreement / Disagreement

Participants express differing views on the nature of mass, with no consensus reached on whether mass is absolute or influenced by gravitational fields and relativistic effects.

Contextual Notes

Some claims rely on specific interpretations of gravitational effects and the relationship between mass and energy, which may not be universally accepted or fully resolved within the discussion.

Merkur
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Hallo everybody!


Now I’ve got another problem:

Is „mass“ really absolute or does it depend on the gravity?

(Here, I really think of „mass“, not of „weight“)


Thank you!
 
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The word "mass" refers essentially to the proportionality constant between applied force and experienced acceleration:

F = m a

Weight is force -- the force pulling you to the Earth right now, for example. On the Moon, a body with a mass of 1 kg will not weight 9.8 Newtons like it does on Earth -- it will weigh less. However, if you apply the same force to the 1 kg mass on both the Earth and the Moon, the mass will accelerate the same way in both places.

- Warren
 
From what I understand of GR, mass is more massive in a stronger gravitational field, because the field equation has a sort of positive feedback. In other words, a mass in a g-field has an energy because it is in the g-field. This energy contributes to the amount of gravitation, which is directly related to the mass.
 
i feel....

before i begin, this is my own idea not any sort of a theory. i feel mass is something that exist when there is a charge. Look at an atom it has charge(inside it) and it has mass. but now look at light, it has no charge and it has no mass. So i feel that mass is something caused by charge in space time.

I might be wrong, if i am please correct me.

-Benzun
All For God.
 
Originally posted by chroot
The word "mass" refers essentially to the proportionality constant between applied force and experienced acceleration:

F = m a

Weight is force -- the force pulling you to the Earth right now, for example. On the Moon, a body with a mass of 1 kg will not weight 9.8 Newtons like it does on Earth -- it will weigh less. However, if you apply the same force to the 1 kg mass on both the Earth and the Moon, the mass will accelerate the same way in both places.

- Warren

Thank you for your answers ... :smile:


But I do know the difference between mass and weight ...

But does the relativity theory cause any mutation of mass, too (when anything passes anything with a particular speed)?


Mille grazie!
 

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