What rule did you observe about the energy before impact the energy after impact

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

Write maxwell's equations and discuss the terms involved and the results of each equation in classical electrodynamics. if it is possible to write these equations in integral form, give the integral forms. find the wave equation for electromagnetic waves from the maxwell equations. what is the propagation velocity of electromagnetic waves in space according to the wave equation you find?

How do you tell if someone actually cares about you? and just say they do?