Can someone help me?

Which of the following would not be taken into consideration when describing the quality of a sound

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j