The dimensionless parameter $$ is used frequently in relativity. As $$ becomes larger and larger than $1,$ it means relativistic effects are becoming more and more important.

Part $($a$)$

What is $$ if $v=0\mathrm{.}22c?$

$=I$

$$

$$

Part $($b$)$

What is $$ if $v=0\mathrm{.}48c?$