Engineering, 08.10.2020 14:01, laneake96
Measurements on sodium have provided the following data:.
resistivity 4.7 × 10–8 ohm m, Hall coefficient –2.5 × 10–10 m3 C–1, critical wavelength of transparency 210 nm, and density 971 kg m–3.
Calculate
(i) the density of electrons,
(ii) the mobility,
(iii) the effective mass,
(iv) the collision time,
(v) the number of electrons per atom available for conduction.
Electric conduction in sodium is caused by electrons. The number of atoms in a kg mole is 6.02 × 1026 and the atomic weight of sodium is 23.
Answers: 3
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Engineering, 04.07.2019 18:10, wyattlb97
Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?
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Engineering, 04.07.2019 18:20, moneywaydaedae
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Answers: 1
Measurements on sodium have provided the following data:.
resistivity 4.7 × 10–8 ohm m, Hall coeffi...
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