Is inertial mass of gas the same as its rest mass

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SUMMARY

The discussion centers on the relationship between inertial mass and rest mass of a gas within a box subjected to acceleration. It concludes that when a force is applied to accelerate the box, the work required increases due to the effects of Lorentz contraction, which compresses the gas. This indicates that the inertial mass of the gas is indeed greater than its rest mass when considering the additional energy required for compression during acceleration. The implications of this phenomenon are significant for understanding relativistic physics.

PREREQUISITES
  • Understanding of Lorentz contraction in special relativity
  • Basic principles of gas behavior under pressure
  • Familiarity with inertial mass versus rest mass concepts
  • Knowledge of Newton's laws of motion
NEXT STEPS
  • Study the implications of Lorentz contraction on gas dynamics
  • Explore the relationship between energy and mass in relativistic contexts
  • Investigate the effects of acceleration on different states of matter
  • Learn about relativistic momentum and its applications in physics
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Physicists, students of relativity, and anyone interested in the fundamental principles of mass and acceleration in the context of relativistic physics.

kahoomann
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Suppose we have a box at rest that is filled with a uniform gas. We denote the volume by V and the pressure by p. Suppose next that we apply a small force to the box and accelerate it until it has a speed v. The key question is: Is it harder to accelerate the gas because it takes work not only to accelerate the existing energy but also to compress the gas as the Lorentz contraction demands? In other words, is the inertia of the box is larger than just its rest mass?
 
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