Suppose that the moment of inertia of a skater with arms out and one leg extended is 3.3 kg⋅m2 and for arms and legs in is 0.90 kg⋅m2 . If she starts out spinning at 4.2 rev/s , what is her angular speed (in rev/s) when her arms and one leg open outward?

Water flows through a garden hose which is attached to a nozzle. the water flows through hose with a speed of 2.19 m/s and through the nozzle with a speed of 19.8 m/s. calculate the maximum height (in m) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed.