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.

SOORRY DUDE I NEED THE POINT

Explanation:

Explanation:

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.