Free Electron Model of Metals
If the electron number density (N/V) of a metal increases by a factor 8, what happens to the Fermi energy \(\left(E_{\mathrm{F}}\right)\)?
Text Transcription:
E_F
tran (mmt2449) – Homework 02 – yao – (56695) 1 This print-out should have 27 questions. A river has a steady speed of 0.342 m/s . A Multiple-choice questions may continue on student swims upstream a distance of 1.5 km the next column or page – find all choices and returns to the starting point. before answering. If the student can swim at a speed of 1.31 m/s in still water, how long does the 001 10.0 points trip take An escalator is 19.8 m long. If a person stands on the escalator, it takes 42.9 s to ride fromCorrect answer: 2457.58 s. the bottom to the top. If a person walks up the moving escalator Explanation: The total time of the trip = time upstream with a speed of 0.567 m/s relative to the plus time downstream. Let v be the speed of escalator, how long does it take the person to get to the top the swimmer in still water, andrv the speed of the river. Correct answer: 19.2506 s. d tup= Explanation: v − r Basic Concepts: 1.5 km × 103 = vpg= ▯vpe+▯veg 1.31 m/s − 0.342 m/s
