A thin uniform rod $($mass $=0\mathrm{.}33kg)$ swings about an axis that passes through one end of the rod and is perpendicular to the plane of the swing. The rod swings with a period of $1\mathrm{.}5$ s and an angular amplitude of $3\mathrm{.}5.($a$)$ What is the length of the rod? $($a$)$ What is the maximum kinetic energy of the rod as it swings?

$($a$)$ Number

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$($b$)$ Number $$ Units $$