Which is a difference between the focus of a nuclear engineer and the job of a nuclear chemist? O Nuclear engineers are concerned with the design, construction, and operation of nuclear reactors; nuclear

chemists study nuclear reactions, radioactive elements, and nuclear power.

O Nuclear chemists are concerned with the design, construction, and operation of nuclear reactors, nuclear

engineers study nuclear reactions, radioactive elements, and nuclear power

O Nuclear engineers are concerned with the production and use of radioactive sources, nuclear chemists study the

absorption of radiation.

O Nuclear chemists are concerned with the production and use of radioactive sources; nuclear engineers study the

absorption of radiation.

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical