Magnetic field lines around a bar magnet a. are only perpendicular to the magnet. b. spread out from one pole and curve around to the other. c. cross back and forth over one another. d. are perfectly straight.

b. spread out from one pole and curve around to the other.

Explanation:

A magnet is a metal in which the domains are aligned in single direction. Magnetic field lines are produced which represent the regions where magnetic force is exerted. A magnet has two poles - North pole and south pole. The field lines originate from North pole and enter south pole. These field lines are curved paths. Inside the magnet, field lines are straight lines from south pole to north pole. These lines do not cross each other.

Option (B)

Explanation:

A magnet has both the north pole and south pole. This magnet when it comes under the influence of a magnetic field, it produces magnetic field lines that go out from the north pole and eventually goes in through the south pole. These field lines maintain a curvy path. But these field lines are straight and directly moves from south pole to north pole inside the bar magnet. These field lines never intersect one another.

Thus, the magnetic field lines around a bar magnet spread out from one pole and curve around the other.

Hence, the correct answer is option (B).

a physical change is being made.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .