Answer the following questions (just give answer, no complex equations please): To measure the dispersive of...
Answer the following questions (just give answer, no complex equations please):
- To measure the dispersive of phonon, we used neutron inelastic scattering method. Please tell me why a traditional Raman scatting facility which is able to measure the phonon energy cannot do it?
- To measure the effective mass of a hole or electron in a material, usually we have to go to low temperature. Why is that?
- If I have one solid, I heat it up; the lattice constant increased by 1%, what will be the Fermi energy changed?
- At near room temperature, the electron conductivity of a metal decreases as the temperature increases, while in a typical semiconductor, the electron conductivity increases as the temperature is raised. Can you explain why?
(Please ALL answer be as brief as possible but clearly written)
Homework Answers
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Answer the following questions (just give answer, no complex
equations please):
To measure the dispersive of...
1. When a hole moves from the p-side of a junction to the n-side, why does...
1. When a hole moves from the p-side of a junction to the n-side, why does its energy increase? 2. Discuss how a missing atom at a lattice side contributes to the conductivity of a semiconductor 3. Estimate the energy of a photon of X rays. (Answer: 12 keV) 4. On the one hand, we say that electrons in atoms have discrete energies; on the other hand, we say that there is inherent uncertainty in our ability to measure energies....
Please write a clear and direct answer, no need for further explanations The course name is...
Please write a clear and direct answer, no need for
further explanations
The course name is Nanomaterials
4 (15 pt) As you learned from the Professor Samuelson's research in this class, we can measure the electron transport in (InAs/InP/InAs/InP/ ) semiconductor nanowire along with its longitudinal direction. One of the components with a higher energy band gap acts as a barrier layer for the electron transport. Consider the experimental data for the electron single superlattice structured a transport. Temperature (C)...
Problem #11) Please answer to the following questions: i) Conceptually there is one characteristic that can...
Problem #11) Please answer to the following questions: i) Conceptually there is one characteristic that can be used to distinguish between a glass and a crystalline material. Describe this characteristic in 2 bullet points or less. ii) Semiconductor materials like Si and GaAs have electron-hole pairs as their intrinsic point defects. Using bonding as the starting point briefly explain why these materials don't have vacancies like metals or Schottky or Frenkel defects like ionic ceramics, as their primary intrinsic point...
Problem #11) Please answer to the following questions: Semiconductor materials like Si and GaAs have electron-hole...
Problem #11) Please answer to the following questions: Semiconductor materials like Si and GaAs have electron-hole pairs as their intrinsic point defects. Using bonding as the starting point briefly explain why these materials don't have vacancies like metals or Schottky or Frenkel defects like ionic ceramics, as their primary intrinsic point defects.
please answer these two questions and explain why 5, An electron is forced to move from...
please answer these two questions and explain
why
5, An electron is forced to move from a positively charged plate toward a negatively charged plate by an external nonconservative force. A. Its potential energy and total energy both B. Its potential energy and total energy both C. Its potential energy increases; its total increase decrease energy stays the same. D. Its potential energy decreases; its total energy stays the same. Its potential energy increases; its total energy decreases. E. 6....
Please answer all parts of questions (20 to 26) 20: Make use of the following information...
Please answer all parts of
questions (20 to 26)
20: Make use of the following information for calculating the electron Affinity of C AH = -216 kJ A H2 249 kJ AH3 = + 240 kJ A H4 ? A H5 786 kJ A Ho-411 kJ 1: 2Na 2: ½ Na(g 3: Cl2() 4: Cl eg) 5: Na () Cl 6: Nas 2Nas ½ Na () 2Ck Deposition Energy Ionisation Energy Atomization Energy Electron affinity Lattice Energy Standard Enthalpy of...
Please answer the following stats questions. These data measure the "recognition score" for children exposed to...
Please answer the following stats questions. These data measure the "recognition score" for children exposed to a certain medium. The two factors are Medium Type (levels: TV, Audio Tape, Written Material) and Exposure Time (levels: 5, 10, 15, 20 minutes). (a) Why are these data considered unbalanced? (b) Which sums of squares are the proper ones to examine here if we wish to study the effect of the factors on recognition score? (Type I SS or Type III SS?) data...
i just wanna double check whether i answered correct or not please. Why do we measure...
i just wanna double check whether i answered correct or not
please.
Why do we measure the volume of the flask in this experiment with water rather than using the volume listed on the side? Select all correct answers that apply. Must include all correct answers for full credit. The volume is not accurate on a flask to the number of significant figures required for this experiment The volumetric markings on the flask do not extend to it's full height...
Please help urgent( will rate):) hi so the right answer to these questions are the ones ive circled but i just dont und...
Please help urgent( will rate):)
hi so the right answer to these questions are the ones ive
circled
but i just dont understand why.
thanks
the
answer to 15 is D
28 6. He ions are prepared with the electron in the T=X state. The electrons relax to lower energy states, by one or more transitions, and produce an emission spectrum with light at 6 difference wavelengths. What is the value of X? A. 3 B. 4 С. 5 D....
Please answer all questions for chemistry!! Place the following compounds in order of decreasing strength of...
Please answer all questions for chemistry!!
Place the following compounds in order of decreasing strength of intermolecular forces. I. CH_3CH_2CH_2CH_2CH_2CH_3 II. (CH_3)_3CCH_3 III. (CH_3)_3CCH_2CH_3 A) III > II > I B) I > III > I C) I > II > III D) II > III > I E) III > I > II Identify the place which has the lowest boiling point of water A) Death Valley, 282 feet below sea level B) New Orleans, sea level C) Mt....
Please write a clear and direct answer, no need for
further explanations
The course name is Nanomaterials
4 (15 pt) As you learned from the Professor Samuelson's research in this class, we can measure the electron transport in (InAs/InP/InAs/InP/ ) semiconductor nanowire along with its longitudinal direction. One of the components with a higher energy band gap acts as a barrier layer for the electron transport. Consider the experimental data for the electron single superlattice structured a transport. Temperature (C)...
Problem #11) Please answer to the following questions: i) Conceptually there is one characteristic that can be used to distinguish between a glass and a crystalline material. Describe this characteristic in 2 bullet points or less. ii) Semiconductor materials like Si and GaAs have electron-hole pairs as their intrinsic point defects. Using bonding as the starting point briefly explain why these materials don't have vacancies like metals or Schottky or Frenkel defects like ionic ceramics, as their primary intrinsic point...
Problem #11) Please answer to the following questions: Semiconductor materials like Si and GaAs have electron-hole pairs as their intrinsic point defects. Using bonding as the starting point briefly explain why these materials don't have vacancies like metals or Schottky or Frenkel defects like ionic ceramics, as their primary intrinsic point defects.
please answer these two questions and explain
why
5, An electron is forced to move from a positively charged plate toward a negatively charged plate by an external nonconservative force. A. Its potential energy and total energy both B. Its potential energy and total energy both C. Its potential energy increases; its total increase decrease energy stays the same. D. Its potential energy decreases; its total energy stays the same. Its potential energy increases; its total energy decreases. E. 6....
Please answer all parts of
questions (20 to 26)
20: Make use of the following information for calculating the electron Affinity of C AH = -216 kJ A H2 249 kJ AH3 = + 240 kJ A H4 ? A H5 786 kJ A Ho-411 kJ 1: 2Na 2: ½ Na(g 3: Cl2() 4: Cl eg) 5: Na () Cl 6: Nas 2Nas ½ Na () 2Ck Deposition Energy Ionisation Energy Atomization Energy Electron affinity Lattice Energy Standard Enthalpy of...
i just wanna double check whether i answered correct or not
please.
Why do we measure the volume of the flask in this experiment with water rather than using the volume listed on the side? Select all correct answers that apply. Must include all correct answers for full credit. The volume is not accurate on a flask to the number of significant figures required for this experiment The volumetric markings on the flask do not extend to it's full height...
Please help urgent( will rate):)
hi so the right answer to these questions are the ones ive
circled
but i just dont understand why.
thanks
the
answer to 15 is D
28 6. He ions are prepared with the electron in the T=X state. The electrons relax to lower energy states, by one or more transitions, and produce an emission spectrum with light at 6 difference wavelengths. What is the value of X? A. 3 B. 4 С. 5 D....
Please answer all questions for chemistry!!
Place the following compounds in order of decreasing strength of intermolecular forces. I. CH_3CH_2CH_2CH_2CH_2CH_3 II. (CH_3)_3CCH_3 III. (CH_3)_3CCH_2CH_3 A) III > II > I B) I > III > I C) I > II > III D) II > III > I E) III > I > II Identify the place which has the lowest boiling point of water A) Death Valley, 282 feet below sea level B) New Orleans, sea level C) Mt....
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