Density involves the amount of a material in a certain volume. when a material changes phases, it changes in density in a predictable way as the amount of material stays the same but the molecules get farther apart or closer together. water has solid and liquid states that do not follow these predictions of density in the phases of matter.
what does that mean about the densities of the phases of water?
the solid state is the most dense, followed by the liquid state, then the gas state.
the solid state is more dense than the liquid state.
the liquid state is more dense than the solid state.
the gas state is the most dense, followed by the liquid state, then the solid state.

The appropriate answer is 'the liquid state is more dense than the solid state'. This phenomenon explains why ice floats when it is frozen. When water freezes it expands by approximately 10 percent. It also becomes less dense. This explains why only 10 percent of an iceberg is above the ocean water and the remaining 90 percent is below the waves. 

No it would not hope that

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction