The temperature of air changes from 0 to 10°c while its velocity changes from zero to a final velocity, and its elevation changes from zero to a final elevation. at which values of final air velocity and final elevation will the internal, kinetic, and potential energy changes be equal?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?