On earth, water exists as
a. a solid.
c. a gas.
b. a liquid.
d. all of the above.

D. All of the Above

This is because water we drink or water in oceans & seas exists in liquid from. Water on the top of mountains exists in solid state (ice) because mountains are cold places. Water in air exists in gas in the form of Water Vapours.

Where is the table ? you can take a picture of it

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