7 Which of the following shows two vehicles with equal velocities?
A. two identical cars traveling at the same speed in
different directions

B. two identical cars traveling
at different speeds in
the same direction

C. a car and a motorcycle traveling at the same
speed in opposite directions

D. a car and a motorcycle traveling at the same
speed in the same direction

b.a device that inputs heat into a cool object

  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.

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures