### Expanding Universe

##### Score: 3 Points

Our universe is continuously expanding. To measure its expansion, we use a time-dependent parameter called the scale factor. It works in such a way $\delta x=a(t)\delta x_0$

Using this we can find a relation,

$\dot a(t)/a(t) \propto 1/(a(t))^p$

Determine the value of P.

Note: Total energy is zero.

Astrophysics

#### Statistics

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