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BWV
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I cannot get past thinking of it like air pressure
BWV said:I cannot get past thinking of it like air pressure
In GR, pressure refers to the force per unit area that a substance exerts on its surroundings. This can be a result of the substance's internal energy and motion of its particles.
In GR, pressure contributes to the energy-momentum tensor, which is a mathematical representation of the distribution of matter and energy in spacetime. This tensor affects the curvature of spacetime, and thus, pressure plays a role in shaping the gravitational field.
Yes, pressure can change the trajectory of an object in GR. This is because pressure affects the energy-momentum tensor, which in turn affects the curvature of spacetime. As objects move through curved spacetime, their trajectories are influenced by the surrounding matter and energy, including pressure.
The principle of equivalence in GR states that the effects of gravity are indistinguishable from the effects of acceleration. Pressure plays a role in this principle as it contributes to the energy-momentum tensor, which is used to describe the curvature of spacetime. This tensor is what determines the gravitational field, and thus, pressure is a factor in the equivalence of gravity and acceleration.
Yes, pressure can be negative in GR. This is known as negative pressure or tension. In some cases, negative pressure can counterbalance the effects of positive pressure, resulting in a net pressure of zero. This can have implications for the curvature of spacetime and the overall behavior of the universe.