Use the graph to answer the question.

P-waves reach a seismogram 6 minutes after an earthquake occurs and the S-waves arrive 3 and a half minutes later. How far is the seismogram from the earthquakes epicenter?

A) 1000 km
B) 2000 km
C) 3000 km
D) 4000 km

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?