a uniformly charged solid cylinder, of radius R, of length L and total charge Q, is centered at the origin with the cylinder axis coinciding with the z axis. The cylinder is spinning at a constant angular velocity about the z axis. Find its magnetic dipole moment

  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.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

there are no contact forces mentioned on the list of choices that you've provided.