Cual es la energía cinética en Joules de un balón de fútbol cuya masa es de 460g y lleva una velocidad de 20m/s?

How do you tell if someone actually cares about you? and just say they do?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

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?