Mr. Wang works in a recycling center. Recyclable materials arrive at the center mixed together. Workers use magnets to separate steel cans
from other items. Which two statements are true about the force
between a steel can and a magnet?
A. Gravity pushes the can toward the magnet.
B. The force between the can and the magnet is a noncontact force.
C. The attraction between the can and the magnet is a pull.
D. The attraction between the can and the magnet is a push.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?