Find the mass of an object on earth that weighs 39 N?

3.9kg

Explanation:

From newton's second law of motion

F =ma

a = 10m/s^2

F=39N

a= F/m

a= 39/10

a= 3.9m/s^2

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

  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.