The figure shown above shows the energy levels for the hydrogen atom. What is the energy of the photon emitted when the electron in a hydrogen atom drops from the energy level E5 to energy level E2?
Please show work in guess method if possible. ( givens, unknown, equation, substitute, solve )

How does the space charge width change with forward and reverse bias? also, calculate the space charge width for a reverse bias of 4v on a silicon pn junction at t = 300k and doping concentrations of na = 5x1015cm-3 , nd = 5x 1016 cm-3 .

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?