A machine converts 40% of electrical energy into mechanical energy and 60% into heat energy. What statement explains the law of conservation of energy? a. Machines always convert only a part of electrical energy to another form of energy.

b. Electrical energy always produces heat energy.

c. The machine changes the form of the electrical energy but cannot create or destroy energy.

d. Electrical energy is always accompanied by mechanical energy.

graphing motion: mastery test

209be

what is the instantaneous acceleration of

the particle at point b?

0 meters/second?

10 meters/second?

12 meters/second?

velocity imetersisecond

15 meters/second?

20

time (seconds)

answer: 0 meters/second^2

  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.

i think its c if i'm wrong