What is the energy, in keV, of 60 keV x-ray photons that are backscattered (i. e., scattered directly back toward the source) by the electrons in a target

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

Which atomic model was proposed as a result of j. j. thomson’s work?

The energy released by a nuclear fusion reaction is produced when