Andy classified some substances as shown in the table. andy's table -magnetic- -non-magnetic- steel plastic cobalt paper leather wood why is andy's table incorrect? a)wood is a magnetic substance. b)paper is a magnetic substance. c)cobalt is a non-magnetic substance. d) leather is a non-magnetic substance.

Silica, sio2, is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when silicon is exposed to o2 gas at an elevated temperature. at 900˚c, it takes 90 minutes for the oxygen to diffuse from the surface to form a 0.06 micron (0.06 x 10-6 m) thick layer of sio2 on

In an energy pyramid, which level has the most available energy?

What happens when an acid dissolves?