In the standard model of the expansion of the universe, the total energy of a standard mass m is assumed to be zero.When we solve the resulting energy equation for the critical mass density of the universe, we find that the critical mass density is given by:

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The Answer of In the standard model of the expansion of the universe, the total energy of a standard mass m is assumed to be zero.When we solve the resulting energy equation for the critical mass density of the universe, we find that the critical mass density is given by:

In the Standard Model of the Expansion of the Universe