How does increasing the tension of a spring affect a wave on the spring

i think the answer is a, hope this is right, that would be my best guess.

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

3.2x10^7

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.