What will be evidence of a galaxy moving toward earth? a. the galaxy has a loose, disorganized appearance b. the stars in the galaxy appear to twinkle . c. the galaxy appers to be acceleratin. d. the light wavelenghths coming from the galaxy are becoming shorter

Choice D). is on the right track, but it's stated incorrectly.

The wavelengths of light coming from a galaxy that's moving toward us are
shorter than they were when they left the galaxy.  When we see them, they're
shorter than they should be.

(This is called a "blue shift" in the spectrum of the galaxy, because blue is the
short-wavelength end of the spectrum of visible light.  If the wavelength of some
light somehow becomes shorter, then the color of the light changes toward the
direction of blue.)

If the source of light is moving toward us, then the wavelength we see is shorter
than it should be.  If the source is moving away from us, then the wavelength
we see is longer than it should be.  The whole trick to this is knowing what the
wavelength of the light we see should be !

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