The conversion of 6 kg of matter into energy would
release x10^17 J of energy. The largest
thermonuclear weapon ever tested, the "Tsar
Bomba", had a yield of approximately 2.38 x 10^17 J.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

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?

Aball horizontally thrown from a cliff at 8m/s