Pleae Answe How can you make a magnet with electricity? *
10 points
Wrap a wire around a nail and pass electricity through the wire.
Spin a coil of wire inside a magnetic field or move a magnet inside a coil of wire.
Place two permanent magnets near each other.
Rub two magnets together.

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.