You are asked to explain the earth's magnetic field. which is the best reply?

a.) the earth's magnetic south is similar to the north pole of a magnet.

b.) the earth's core has a strong magnetic charge similar to the south pole of a magnet.

c.) the earth's geomagnetic south is similar to the south pole of a magnet.

d.)the earth's magnetic charge is not centered at either pole; it varies based on location.

(8%) problem 12. a bowling ball of mass mb 3 kg 's rolled down the lane with a velocity ofy-2/ m s lt strikes a single remaining pin mp 0.93 kg head on. after the collision the bowling ball has a velocity (in the same direction) of v2 1.1 m/s. = ▲ 33% part (a) write an expression for the velocity of pin in the horizontal direction after the impact, im ,, 33% part (b) what is the pins speed in ms? 33% part (c) assuming the coefficient of friction s μ,-0.1. how far in meters could the pin slide before stopping if it doesn't topple?