Si la longitud de cada riel es de 5 metros y la temperatura cambia de 17°C a 32°C, determina la longitud final de cada riel y la separación mínima que debe existir entre ellos; considera que los rieles son de cobre​

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

An object's buoyant force and weight mean the same thing.a. trueb. false

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?