Consider a two-band model for an intrinsic semiconductor. the effective mass for electrons in the conduction band is 1.4 me. the effective mass for holes in the valence band is 0.50 me. at room temperature, the scattering time for electrons is 1.4 x 10-13 s, and the scattering time for holes is 0.5 x 10-13s . the effective mass for electrons in the conduction band is 1.4 me, and the effective mass for holes in the valence band is 0.50 me . the hole and electron densities are each 1x 1017 m-3. what is the electrical conductivity?
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Chemistry, 21.06.2019 20:00
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Chemistry, 22.06.2019 02:00
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Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
Chemistry, 22.06.2019 18:50
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Answers: 3
Consider a two-band model for an intrinsic semiconductor. the effective mass for electrons in the co...
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