Physics, 13.07.2019 21:10 imantahir1200345
Silicon crystallizes in the diamond structure with a lattice constant a 5.43a a) how many atoms does the cubic elementary cell contain? b) phosphorus atoms incorporated on si sites act as donors. calculate the ionization energy of such a donor impurity within the framework of the simple hydrogenic model (dielectric constant esi 12). c) calculate the radius ro of the first bohr orbital. what is the probability d) discuss the validity of the hydrogenic model and explain its shortcom- e) at what impurity concentration does interaction between the donor cen- of finding the electron in its ground state within a sphere of radius 2ro? how many si atoms are located within such a sphere? ings ters become important? the related impurity band conductivity is as- sumed to correspond to an average donor separation of 4ro 0.
Answers: 1
Physics, 22.06.2019 09:30
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 3
Physics, 22.06.2019 21:50
As microwave light travels through a liquid, it moves at a speed of 2.2 x 108 m/s. if the frequency of this light wave is 1.1 x 108 hz, what is the wavelength of this microwave?
Answers: 2
Physics, 22.06.2019 22:30
Find v1, the speed of the fluid in the left end of the main pipe. express your answer in terms of h1, h2, g, and either a1 and a2 or γ, which is equal to a1a2.
Answers: 2
Physics, 23.06.2019 09:30
One historical reason that people in the indian subcontinent have been reluctant to use livestock for food has been that a. their digestive systems are unable to handle meat and proteins b. they refused to eat meat in order to show resistance to british imperialism c. they are able to use cattle as a labor mainstay of their agriculture d. they can use the meat from cattle as fertilizer to make crops grow better
Answers: 1
Silicon crystallizes in the diamond structure with a lattice constant a 5.43a a) how many atoms does...
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