Last 25 puts. Gave away 1k already today

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

What occurs during a combustion reaction

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?