Question

What is the value of the variation stress energy tensor?

Answer 1

The stress–energy tensor, sometimes stress–energy–momentum tensor or energy–momentum tensor, is a tensorquantity in physics that describes the densityand flux of energy and momentum in spacetime, generalizing the stress tensor of Newtonian physics. It is an attribute of matter, radiation, and non-gravitational force fields. The stress–energy tensor is the source of the gravitational field in the Einstein field equations of general relativity, just as mass density is the source of such a field in Newtonian gravity.

Answer 2

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the value of the variation stress energy tensor

Generalizing the stress tensor of Newtonian physics.

It is an attribute of matter radiation, and non-gravitational force fields.

The stress–energy tensor is the source of the gravitational field in the Einstein field equations of general relativity just as mass density is the source of such a field in Newtonian gravity.

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