I have an idea but I just want to be sure

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?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?