Iron is good for creating solenoids because its _(blank)_ and _(blank)_ allow it to be magnetized and demagnetized quickly.

high susceptibility; high retentivity
high susceptibility; low retentivity
low susceptibility; high retentivity
a
low susceptibility; low retentivity

d is the correct answer

real, smaller and upside-down.   so the answer should be b.

  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 right answer is 0.3 meters per second