Select the correct answer. The motion of a car on a position-time graph is represented with a horizontal line. What does this indicate about the car's motion?
OA.
It's not moving.
OB It's moving at a constant speed.
OC. It's moving at a constant velocity.
OD. It's speeding up.

The answers would be: 1: the liquid only contains one compound4: the liquid is a pure substance

Your answer is c. explanation: plasma  is the fourth state of matter, derived from the gaseous state of matter.  plasma  can contain free  electrons  and/or  ions. while  plasma is never neutral, it can either be positively or negatively charged.  gases, however, are electrically neutral.