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I am new to this, if somebody could help me:

The energy density in stress-energy-tensor is the amount of energy stored in a given system per unit mass. The T00=energy density.

In a 4x4 matrix, we generally start with 1,1. Why it is 0,0?

Secondly, what does energy density mean mathematically? I am unable to get over the concept.

Thanks,

-- Shounak

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# Energy density in Stress Energy Tensor

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