For a given level of technology, there is a maximum density of "bits" of information that can be stored on a computer's hard-drive disk. the data are stored in a tight spiral, so that "tracks" are essentially circles of increasing radius from inner to outer parts of the disk. as the disk spins at a constant rate, data are read at a constant rate regardless of the radius of the track being read.

The answer is orbit around nucleus

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

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