9. Buffers do not minimize the effects of an acid or base on pH. 10. Neutralization is a chemical reaction between an acid and another acid. 11. A salt is a compound formed when the negative ions from an acid combine with the positive ions from a base. 12. In filtering, a solution of known concentration is used to determine the concentration of another solution. 13. Soaps are organic salts. TRUE OR 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?