Chapter 6, Problem 22P

To obtain the value of an unknown electrical charge, a group performed an experiment. From the graph of the electric potential (voltage) V in volts, as a function of the inverse distance (1/r) in m^-1, the group obtained an angular coefficient 6838 Nm^2/C by the linear equation of the best straight line. Knowing that V=(kq)/r, calculate the value of the electric charge, in nC (nanocoulomb), from the slope provided by the best line. Round the answer to a whole number. Use: k = 8.9876 x 10^9 N⋅m^2⋅C^−2

The active volume of a laser constructed of the semiconductor GaAlAs is only 200 mm3 (smaller than a grain of sand), and yet the laser can continuously deliver 5.0 mW of power at a wavelength of 0.80 mm.At what rate does it generate photons?

Using the given charge-to-mass ratios for electrons andprotons, and knowing the magnitudes of their charges areequal, what is the ratio of the proton’s mass to the electron’s?(Note that since the charge-to-mass ratios are given to onlythree-digit accuracy, your answer may differ from theaccepted ratio in the fourth digit.)

At a certain temperature, the electron and hole mobilities in intrinsic germanium are given as 0.43 and 0.21 m2/V s, respectively. If the electron and hole concentrations are both 2.3 x 10'® m, find the conductivity at this temperature.

Check Your Understanding The vibrational frequency of the hydrogen iodide HI diatomic molecule is 6.691013Hz. (a) What is the force constant of the molecular bond between the hydrogen and the Iodine atoms? (b) What is the energy of the emitted photon when this molecule makes a transition between adjacent vibration energy levels?

What is the name of the rule that the emission usually takes place from thelowest vibrational level of the first excited singlet state, because of the rapidvibrational relaxation and internal conversion?

How do the elements exhibit a range of band gaps?

Calculate the number of Frenkel defects per cubic meter in potassium chlorideat 500degC. The energy required to form each Frenkeldefect is 2.6 eV, whereasthe density for KCl is 1.955 g/cm3.

Explain the reason that metal atomic chains have quantized G, different from bulk metals.