Answer
$\beta = 0.99498743 $
Work Step by Step
lorentz factor $\gamma=10$
We know that the formula for lorentz factor is;
$\gamma =\frac{1}{\sqrt (1-\frac{1}{\beta^2})}$
The speed parameter $\beta =\sqrt (1-\frac{1}{\gamma^2})$
We substitute $\gamma$ value i,e 10 in above formula and solve;
$\beta =\sqrt (1-\frac{1}{10^2})$
$\beta = 0.99498743 $
