Measurements of stellar velocities show that a galaxy gets its basic shape from the way that the stars move within it. The difference between the motion of stars in the central roundish bulge of a spiral galaxy and the surrounding flattened disk with spiral arms. Given that elliptical galaxies are relatively round, ranging in shape from spheres to more squished spheroids similar to an American football, which of the following statements most accurately describes the orbits of stars in an elliptical galaxy?
A. All the stars orbit in the same direction around the center of the galaxy.
B. The stars take spiral orbits from the bottom to the top of the galaxy, and then back down again.
C. The stars all have irregular orbits in all directions about the center.
D. The stars in half the galaxy all orbit in one direction around the center, and the stars in the other half orbit together in the opposite direction.

hey , the answer is c

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

god i hope this !