Timmy placed a horseshoe magnet on his desk. he then sprinkled some iron filings around the magnet. in the images below, the poles of the horseshoe magnet are shown in white. which of the following images best shows how the iron filings arranged themselves?

The 3rd image

Explanation:

A magnet has 2 poles, north and south. Magnetic fields originate from the north pole and the move to the south pole.

They are concentrated at the poles where they are strongest.

The best  image that demonstrates the arrangement of the magnetic fields is the 3rd image.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me