The student applies a force of 40 N to 20 kg box Assume there is negligible friction between the box and the floor. Calculate the magnitude of the box’s acceleration.

cant be calculated since there is no direction and magnitude needs direction

Explanation:

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.