A hard disk consists of a stack of aluminum, and alloy, or glass platters, with magnetizable metal oxide. After manufacturing, there is no information whatsoever on the disk. Before the disk can be used, each platter must receive a low-level format done by software. What does this format include

i would say psc (pensacola state college)

answer inspecting packets in isolation from their context;

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.