How much heat flows per second through a well lagged bar of alummium of thermal cond7ctivity 230W ,the bar has length of 300mm and a cross sectional area of 100 mm² with a temorature difference of 40°c between the ends of the bar

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?