Show the relationship between linear expansivity and superficial expansivity​

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

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?