Prokofiev VL - the solution of the entire version 08 on

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Task 4.8

What is the De Broglie wavelength of a thermal neutron having an energy equal to the average

Energy of thermal motion at a temperature of 300 K.

Task 4.18

The average lifetime of this meson is 2.4 × 10-19 s, and its rest energy is 549 MeV. Calculate

Minimum uncertainty of the particle mass.

Task 4.28

The particle is in an infinitely deep one-dimensional, potential well of width l on the second

Energy level. Determine the probability of detection of a particle in the range from 0 to l / 3.

Task 4.38

What is the smallest potential difference that must be applied to an X-ray tube with a tungsten

Anticathode, so that in the spectrum of characteristic X-ray radiation there are all lines of the K-series?

Task 4.48

What proportion of the initial amount of radioactive isotope decays during the lifetime of this

Isotope?

Task 4.58

Calculate the energy of the nuclear reaction p + 115 B -> 342 He.

Task 4.68

Find the ratio of the average number of phonons in a crystal that have an energy half as large

Maximum, to the average number of phonons with a maximum energy at a temperature of 300 K. Debaevskaya

The temperature of the crystal is 150 K.

Task 4.78

Determine the impurity electrical conductivity of a diamond containing indium at a concentration of 5 × 1021 m-3 and

Antimony with a concentration of 2 • 1021 m-3. The mobility of electrons and holes for a diamond is, respectively,

0.18 and 0.12 m2 / (B · s).