Astudy of the properties of electrons electrons of a plasma and high-energy electrons of a solid crystal (able to move in the solid) are examples of fermions. that is, particles that follow fermi-dirac statistics. (for discrete energy levels) exp t or (for a continuum of energy) exprt the quantity e is the fermi energy and g(e) the energy density function. this energy will be assumed constant unless otherwise indicated let us focus on the function f(e)- occupation of an energy level, ε. l. a) study the properties of this function for different temperature values, t, starting at which denotes the probability of exp)1 i. b) derive a linearized expression for f(e) for small r 1.c) discuss on how to fill the energy levels by using a to distinguish electrons in valence conductors

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

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.

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car