The ends of a cylindrical steel rod are maintained at two different temperatures. the rod conducts heat from one end to the other at a rate of 10 cal/s. at what rate would a steel rod twice as long and twice the diameter conduct heat between the same two temperatures?

Will you chech and finish these for me, because i am stumped with them.

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?

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy