Atoms in a solid are in continuous vibrational motion due to thermal energy. At room temperature, the

Question:

Atoms in a solid are in continuous vibrational motion due to thermal energy. At room temperature, the amplitude of these atomic vibrations is typically about 10-9, and their frequency is on the order of 1012 Hz.
(a) What is the approximate period of oscillation of a typical atom?
(b) What is the maximum speed of such an atom?