"a jack-in-the-box is a toy in which a figure in an open box is pushed down, compressing a spring. the lid of the box is then closed. when the box is opened, the figure is pushed up by the spring. the spring in the toy is compressed 0.070 meter by using a downward force of 12.0 newtons.

calculate the spring constant of the spring. [show all work, including the equation and substitution with units."

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.