Answered: Show that (ƏT· V др Cp (%) -1 H

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter7: Quantum Mechanics

Section: Chapter Questions

Problem 7.1CYU: Check Your Understanding If a=3+4i , what is the product a* a?

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Q:: A Si sample is doped with 107 cm3 As. What is the equilibrium hole concentration at 300 k? and where is Ep relative to E,? Take n = 1.5 x 1010 cm-. (Ans. 2.25 x 10'cm,0.407ev).
The concentration of H+ ions outside a membrane is 14 % of the concentration inside the membrane. What must be the Nernst potential across the membrane to maintain that concentration difference when the temperature is such that the Remember, the Boltzmann probability factor: KBT quantity =27 mV. - e ΔΕ Z = e¯¯kBT, Boltzmann's constant is kg = 1.38 x 10-23 J kB K and the = +1.6 x 10-19 C. Express your answer in mV = charge on a proton is e = milli-Volts = 10-3 Volts
Check Your Understanding If a=3+4i , what is the product a* a?
“Diffusion” sounds slow—and over everyday dis-tances it is—but on the scale of a cell it is very fast. The aver-age instantaneous velocity of a particle in solution—that is,the velocity between the very frequent collisions—isv = (kT/m)½where k = 1.38 × 10–16 g cm2/K sec2, T = temperature in K(37°C is 310 K), and m = mass in g/molecule.Calculate the instantaneous velocity of a watermolecule (molecular mass = 18 daltons), a glucose mol-ecule (molecular mass = 180 daltons), and a myoglobinmolecule (molecular mass = 15,000 daltons) at 37°C. Justfor fun, convert these numbers into kilometers/hour. Before you do any calculations, try to guess whether themolecules are moving at a slow crawl (<1 km/hr), an easywalk (5 km/hr), or a record-setting sprint (40 km/hr).
The hole density n silicon is given by p() 10 e WPx>0)where L-2x 10 cm Assume the hole diffusion coefficient is D.8 cm/s. Determine he hole dif. fusion current density at (a) X 0, (b) x2× 10 cm, and (c) x 10om.
The pressure in a chemical reaction chamber at time t minutes is given by p(t) = 60 arctan(2 + 3t2) kilopascals. (a) Find p'(2). Include the correct units (b) Give a complete sentence interpretation of your answer to part (a) in the context of this problem.
The concentration of H+ ions outside a membrane is 18 % of the concentration inside the membrane. What must be the Nernst potential across the membrane to maintain that concentration difference when the temperature is such that the КВТ quantity =29 mV. e ΔΕ Remember, the Boltzmann probability factor: 1.38 x 10-23, and the J 10-19 C. Express your answer in mV = Ze BT, Boltzmann's constant is kB charge on a proton is e = +1.6 x milli-Volts = 10³ Volts K Your Answer: -49.73 mV Answer units
Given the sample data {1, 2, 3, 2, 7} (a) Calculate the mean.
Starting from the internal energy equation, using the relations for enthalpy h = e + p/p and hT = h + u?/2 for the total enthalpy, get the following energy equation. DhT др + div(kVT) + at a (Tij'u;) + pfiu; Dt
if 0=300 between A¯and B find q value? A¯=2î +2f +4k , B`=qî +ĵ -2K
Find the K.E. (1) per cm³ (2) per mole (3) per gram and (4) per molecule of nitrogen at N.T.P. (Molecular weight of N₂ 28, Normal pressure = 76 cm of mercury, density of Hg 13.6 gm/cm³ g = 980 cm/s², Avogadro's number 6.023 x 1023 molecules/mole. (R = 8.314 x 10² erg/mole K)
(a) Compute the average speed, root-mean-square velocity, and most probable velocity for Ar at 200 K.(mAr=39.948g/mol) (b) The averageatomic momentum for a sample of Ar is 2.41 x 10 -20 g·m/sec. What is the temperature of this sample (in K).

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