Which of these shows acceleration? how much is the net force? question 6 options:   c is accelerating, the net force is 40 n up.   d is accelerating, the net force is 15 n up.   d is accelerating, the net force is 15 n down.   c is accelerating, the net force is 0 n.

C is not accelerating.  The forces shown are balanced.

Looking at Block-D, the 25N downward force cancels 25 of the 40N upward force.  But that still leaves another 15N of upward force.  So there's a net force of 15N up, and D is accelerating up. (2nd choice)

do you have a formula possibly

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.