Please help! Explain what happens at both the macroscopic and microscopic level in the diagram?

Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2