$v\left(a\right)\approx v\left(a_{\text{final}}\right)\approx 10\text{-}{10}^2$

$v\left(a_{\text{initial}}\right)$

$n_f$ (Equation (5))

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10³

~10²³

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10⁸

~10³

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10¹⁰

~10⁻⁶ (not measurable)