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, 21.06.2019 23:20, stormserena
The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.
Answers: 3
Physics, 22.06.2019 04:50, ineedhelpplz40
Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?
Answers: 1
Physics, 22.06.2019 09:00, atsuedem974
Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic
Answers: 2
Silicon crystallizes in the diamond structure with a lattice constant a 5.43a a) how many atoms does...
History, 23.01.2020 17:31
Chemistry, 23.01.2020 17:31
Social Studies, 23.01.2020 17:31
Chemistry, 23.01.2020 17:31
Social Studies, 23.01.2020 17:31